Administration for Network

Connectivity for Avaya

Communication Manager

555-233-504
Issue 12
February 2007
© 2007 Avaya Inc.
All Rights Reserved.

Notice
While reasonable efforts were made to ensure that the information in this
document was complete and accurate at the time of printing, Avaya Inc. can
assume no liability for any errors. Changes and corrections to the information
in this document may be incorporated in future releases.
For full legal page information, please see the documents,
Avaya Support Notices for Software Documentation, 03-600758, and
Avaya Support Notices for Hardware Documentation, 03-600759.
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 Contents

About this document . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Purpose. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Changes from the previous version . . . . . . . . . . . . . . . . . . . . . . . . . 11
Content . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Chapter 1: Networking overview . . . . . . . . . . . . . . . . . . . . . . 13

About “network” terminology. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
About digital telephone calls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
About network regions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Establishing inter-switch trunk connections . . . . . . . . . . . . . . . . . . . . 15
Interconnecting port networks . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Networking branch offices . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Control networks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Enabling spanning tree protocol (STP) . . . . . . . . . . . . . . . . . . . . . 16
Inter-Gateway Alternate Routing (IGAR) . . . . . . . . . . . . . . . . . . . . . 17
Dial Plan Transparency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Network quality management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
About VoIP-transmission hardware . . . . . . . . . . . . . . . . . . . . . . . . . 18
Processor Ethernet (PE). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Providing LAN security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Connection Preservation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
H.248 and H.323 Link Recovery. . . . . . . . . . . . . . . . . . . . . . . . . . 21
Auto fallback to primary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Local Survivable Processor (LSP) . . . . . . . . . . . . . . . . . . . . . . . . 22
Enterprise Survivable Server (ESS) . . . . . . . . . . . . . . . . . . . . . . . 22
Standard Local Survivability (SLS) . . . . . . . . . . . . . . . . . . . . . . . . 22
Port network configurations with S8500 and S8700-series Media Servers . . . . 23
Fiber-PNC and IP-PNC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Reliability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
S8500 Media Server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
S8700-series Media Server . . . . . . . . . . . . . . . . . . . . . . . . . . 24
S8500 IP-PNC (single control network). . . . . . . . . . . . . . . . . . . . . . 26
Duplicated TN2602AP circuit packs in IP-PNC PNs . . . . . . . . . . . . . 27
S8500 direct-connect (single control network) . . . . . . . . . . . . . . . . . 29
TN2602AP circuit packs for duplicated bearer. . . . . . . . . . . . . . . . 31
Rules for TN570B circuit pack placement with SCC1/MCC1
Media Gateways . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Issue 12 February 2007 3

Contents

S8700-series IP-PNC (single control network) . . . . . . . . . . . . . . . . . . 33

S8700-series IP-PNC (duplicated control network) . . . . . . . . . . . . . . . 36
S8700-series IP-PNC (duplicated control and duplicated bearer network) . . 38
Sample S8700-series IP-PNC configuration (duplicated control
and duplicated bearer) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
S8700-series direct-connect (single control network) . . . . . . . . . . . . . 42
TN2602AP circuit packs for duplicated bearer. . . . . . . . . . . . . . . . 44
S8700-series direct-connect (duplicated control network) . . . . . . . . . . . 46
S8700-series direct-connect (duplicated control and bearer networks) . . . . 48
Rules for TN570B circuit pack placement with SCC1/MCC1
Media Gateways . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
S8700-series Center Stage Switch (single control network) . . . . . . . . . . 52
TN2602AP circuit packs for duplicated bearer. . . . . . . . . . . . . . . . 54
S8700-series Center Stage Switch (duplicated control network) . . . . . . . . 57
TN2602AP circuit packs for duplicated bearer. . . . . . . . . . . . . . . . 57
S8700-series Center Stage Switch (duplicated control and bearer networks) 60
TN2602AP circuit packs for duplicated bearer. . . . . . . . . . . . . . . . 60
S8700-series ATM Switch (single control network) . . . . . . . . . . . . . . . 63
TN2602AP circuit packs for duplicated bearer. . . . . . . . . . . . . . . . 63
S8700-series ATM Switch (duplicated control networks) . . . . . . . . . . . . 68
TN2602AP circuit packs for duplicated bearer. . . . . . . . . . . . . . . . 68
S8700-series ATM Switch (duplicated control and bearer networks) . . . . . 71
TN2602AP circuit packs for duplicated bearer. . . . . . . . . . . . . . . . 71
Distance options with fiber-optic connections . . . . . . . . . . . . . . . . . 74
Fiber connections up to 200 feet (61 meters) . . . . . . . . . . . . . . . . 74
Fiber connections up to 22 miles (35.4 kilometers) . . . . . . . . . . . . . 75
Fiber connection up to 200 miles . . . . . . . . . . . . . . . . . . . . . . . 76
Metallic cable for intracabinet connections . . . . . . . . . . . . . . . . . 78
Configurations with both IP-PNC and fiber-PNC PNs . . . . . . . . . . . . . . . . 79
Possibilities for combining IP-PNC and fiber-PNC PNs
in a configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Media gateway combinations . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Options for multiple levels of reliability . . . . . . . . . . . . . . . . . . . . . 82
Administering an S8700-series Media Server for duplicated
and single control networks . . . . . . . . . . . . . . . . . . . . . . . . . 82
Dedicated and non-dedicated control networks . . . . . . . . . . . . . . . . . 82
Requirements for using both IP-PNC and fiber-PNC PNs. . . . . . . . . . . . 82
TN2602AP circuit packs in fiber-PNC PNs . . . . . . . . . . . . . . . . . . 84
Examples of combining IP-PNC and fiber-PNC PNs . . . . . . . . . . . . . . 84
Example of combining direct- and IP-PNC PNs . . . . . . . . . . . . . . . 84
Example of IP-PNC PNs with different reliability levels . . . . . . . . . . . 86

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Example of combining IP- and fiber-PNC PNs with different

reliability levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Example of combining IP- and ATM-connected PNs and different
reliability levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
MCC1 Media Gateway with IP-PNC PNs or a combination of IP-
and fiber-PNC PNs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Options for IP-PNC PNs in an MCC1 Media Gateway . . . . . . . . . . . . 94
Options for combined IP- and fiber-PNC PNs in an MCC1 Media
Gateway (single control network) . . . . . . . . . . . . . . . . . . . . . . 95
Options for combined IP- and fiber-PNC PNs in an MCC1 Media
Gateway (duplicated control networks) . . . . . . . . . . . . . . . . . . . 96
Options for combined IP- and fiber-PNC PNs in an MCC1 Media
Gateway (duplicated control and bearer networks) . . . . . . . . . . . . 97
Example of MCC1 IP-PNC . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Example of MCC1 with IP- and fiber-PNC PNs . . . . . . . . . . . . . . . . 99
ESS support for combined IP- and fiber-PNC PNs . . . . . . . . . . . . . . . 102

Chapter 2: Control Networks for S8700-Series and S8500 Media Servers 103
Control network C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
CNC configuration: Multi-site private CNA, CNB,
with remote PNs on public LAN . . . . . . . . . . . . . . . . . . . . . . . . . 104
Combining fiber-connected and IP-connected port
networks in a single configuration . . . . . . . . . . . . . . . . . . . . . . . . . 105
Sample configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Network connectivity between S8700-series servers and port networks . 105
Control network on customer LAN (CNOCL) . . . . . . . . . . . . . . . . 111

Chapter 3: Administering converged networks . . . . . . . . . . . . . . 115

About Voice over IP converged networks . . . . . . . . . . . . . . . . . . . . . . 115
Providing a network assessment . . . . . . . . . . . . . . . . . . . . . . . . . 116
Setting up VoIP hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
TN464HP/TN2464CP Universal DS1 circuit packs and
MM710 T1/E1Media Module . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
Working with echo cancellation . . . . . . . . . . . . . . . . . . . . . . . 118
Administering echo cancellation on the DS1 circuit pack
or MM710 media module . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
Administering echo cancellation on trunks . . . . . . . . . . . . . . . . . 120
TN799DP Control LAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
Physical addressing for the C-LAN board . . . . . . . . . . . . . . . . . . 122
IP addressing techniques for the C-LAN board . . . . . . . . . . . . . . . 123
Installing the TN799DP C-LAN . . . . . . . . . . . . . . . . . . . . . . . . 123
Administering the C-LAN bus bridge (Avaya DEFINITY Server csi only) . 123

Issue 12 February 2007 5

Contents

Installing C-LAN cables to a hub or ethernet switch . . . . . . . . . . . . 124

Assigning IP node names . . . . . . . . . . . . . . . . . . . . . . . . . . 125
Defining a LAN default gateway . . . . . . . . . . . . . . . . . . . . . . . 126
Setting up Alternate Gatekeeper and
C-LAN load balancing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
TN2302AP IP Media Processor . . . . . . . . . . . . . . . . . . . . . . . . . . 128
Improving theTN2302AP transmission interface . . . . . . . . . . . . . . 129
Supporting TN2302AP hairpinning . . . . . . . . . . . . . . . . . . . . . . 129
Testing TN2302AP ports. . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
Enabling a survivable remote EPN . . . . . . . . . . . . . . . . . . . . . . 129
TN2602AP IP Media Resource 320 . . . . . . . . . . . . . . . . . . . . . . . . 129
Load balancing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Bearer duplication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Combining duplication and load balancing . . . . . . . . . . . . . . . . . 131
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
Firmware download . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
I/O adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
TN2312BP IP Server Interface (IPSI) . . . . . . . . . . . . . . . . . . . . . . . 133
MM760 VoIP Media Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
What is the MM760 Ethernet interface . . . . . . . . . . . . . . . . . . . . 134
Supporting voice compression on the MM760. . . . . . . . . . . . . . . . 134
TN8400AP Media Server circuit pack . . . . . . . . . . . . . . . . . . . . . 135
TN8412AP S8400 server IP Interface . . . . . . . . . . . . . . . . . . . . . 135
Administering Avaya gateways . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136
Administering IP trunks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
Administering SIP trunks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
Administering H.323 trunks . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
Setting up H.323 trunks for administration . . . . . . . . . . . . . . . . . 138
Administering H.323 trunks . . . . . . . . . . . . . . . . . . . . . . . . . . 150
Dynamic generation of private/public calling party numbers. . . . . . . . 157
Administering Avaya phones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
Administering IP Softphones . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
Administering the IP Softphone . . . . . . . . . . . . . . . . . . . . . . . 159
Installing and administering Avaya IP telephones . . . . . . . . . . . . . . . 163
About the 4600-series IP telephones . . . . . . . . . . . . . . . . . . . . . 163
About IP telephone hardware/software requirements. . . . . . . . . . . . 164
Administering Avaya IP telephones . . . . . . . . . . . . . . . . . . . . . 165
About hairpinning and shuffling . . . . . . . . . . . . . . . . . . . . . . . . . 166
What hardware and endpoints are required . . . . . . . . . . . . . . . . . 167
What are shuffled audio connections . . . . . . . . . . . . . . . . . . . . 167

6 Administration for Network Connectivity for Avaya Communication Manager

 Contents

What are shuffling examples . . . . . . . . . . . . . . . . . . . . . . . . . 168

What are hairpinned audio connections . . . . . . . . . . . . . . . . . . . 170
What is an example of a hairpinned call . . . . . . . . . . . . . . . . . . . 171
Hairpinning and shuffling administration interdependencies . . . . . . . . . 173
About Network Address Translation (NAT) . . . . . . . . . . . . . . . . . . . 174
What are the types of NAT . . . . . . . . . . . . . . . . . . . . . . . . . . 175
What are the issues between NAT and H.323 . . . . . . . . . . . . . . . . 176
Avaya Communication Manager NAT Shuffling feature. . . . . . . . . . . 176
Administering hairpinning and shuffling. . . . . . . . . . . . . . . . . . . . . 177
Choosing how to administer hairpinning and shuffling. . . . . . . . . . . 177
Administering hairpinning and shuffling at the system-level. . . . . . . . 178
Administering hairpinning and shuffling in network regions. . . . . . . . 180
Administering H.323 trunks for hairpinning and shuffling . . . . . . . . . 183
Administering IP endpoints for hairpinning and shuffling . . . . . . . . . 184
Administering FAX, modem, TTY, and H.323 clear channel calls over IP Trunks . 187
What is relay mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187
What is pass-through mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . 188
Overview of steps to administer FAX, TTY, modem,
and clear channel calls over IP trunks . . . . . . . . . . . . . . . . . . . . . 190
FAX, TTY, modem, and clear channel transmission modes and speeds . . . 191
Considerations for administering FAX, TTY, modem,
and clear channel transmission . . . . . . . . . . . . . . . . . . . . . . . . . 194
Bandwidth for FAX, modem, TTY, and clear channel calls over IP networks . 197
Media encryption for FAX, modem, TTY, and clear channel . . . . . . . . . . 198
SRTP media encryption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199
Platforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200
Administering SRTP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200

Chapter 4: Network quality administration . . . . . . . . . . . . . . . . 201

About factors causing voice degradation . . . . . . . . . . . . . . . . . . . . . . 201
Packet delay and loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203
Echo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203
Echo cancellers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204
Echo cancellation plans (TN464HP/TN2464CP circuit packs) . . . . . . . 204
Echo cancellation plans (TN464GP/TN2464BP circuit packs) . . . . . . . 205
Transcoding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208
Bandwidth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208

Issue 12 February 2007 7

Contents

About Quality of Service (QoS) and

voice quality administration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209
Layer 3 QoS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209
DiffServ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209
RSVP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210
Layer 2 QoS: 802.1p/Q. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210
Using VLANs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210
Administering IP CODEC sets . . . . . . . . . . . . . . . . . . . . . . . . . . 213
Administering IP network regions . . . . . . . . . . . . . . . . . . . . . . . . 220
Defining an IP network region . . . . . . . . . . . . . . . . . . . . . . . . 221
Call Admission Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . 227
Setting up Inter-Gateway Alternate Routing (IGAR) . . . . . . . . . . . . . 230
Setting up Dial Plan Transparency . . . . . . . . . . . . . . . . . . . . . . 231
Network Region Wizard (NRW) . . . . . . . . . . . . . . . . . . . . . . . . 234
Manually interconnecting the network regions . . . . . . . . . . . . . . . 235
Administering inter-network region connections . . . . . . . . . . . . . . 236
Pair-wise administration of IGAR between network regions . . . . . . . . 237
Port network to network region mapping for boards other than IP boards 239
Status of inter-region usage . . . . . . . . . . . . . . . . . . . . . . . . . 240
Reviewing the network region administration . . . . . . . . . . . . . . . . 241
Setting network performance thresholds . . . . . . . . . . . . . . . . . . . . 241
Enabling spanning tree protocol (STP). . . . . . . . . . . . . . . . . . . . 243
Adjusting jitter buffers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245
Configuring UDP ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245
About Media Encryption. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 246
What is Media Encryption? . . . . . . . . . . . . . . . . . . . . . . . . . . . . 246
What are the limitations of Media Encryption? . . . . . . . . . . . . . . . . . 247
What types of media encryption are available? . . . . . . . . . . . . . . . . . 247
Is there a license file requirement?. . . . . . . . . . . . . . . . . . . . . . . . 249
Is Media Encryption currently enabled? . . . . . . . . . . . . . . . . . . . . . 249
Administering Media Encryption . . . . . . . . . . . . . . . . . . . . . . . . . 250
Administering Media Encryption for IP Codec Sets . . . . . . . . . . . . . 250
Administering Media Encryption for signaling groups . . . . . . . . . . . 252
Viewing encryption status for stations and trunks . . . . . . . . . . . . . 254
About legal wiretapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 254
About possible failure conditions . . . . . . . . . . . . . . . . . . . . . . . . 254
How does Media Encryption interact with other features? . . . . . . . . . . . 255

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About network management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 256

About H.248 link loss recovery . . . . . . . . . . . . . . . . . . . . . . . . . . 256
Auto fallback to primary controller for
H.248 media gateways . . . . . . . . . . . . . . . . . . . . . . . . . . . . 257
Basic feature operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 258
G250 interworking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 259
G350 interworking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260
G700 interworking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260
Older media gateway loads . . . . . . . . . . . . . . . . . . . . . . . . . . 261
Administering auto fallback to primary . . . . . . . . . . . . . . . . . . . 261
Enterprise Survivable Servers (ESS) . . . . . . . . . . . . . . . . . . . . . . . 267
Controlling QoS policies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 268
Monitoring network performance . . . . . . . . . . . . . . . . . . . . . . . . . 270

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 271

Issue 12 February 2007 9

Contents

10 Administration for Network Connectivity for Avaya Communication Manager

About this document

Purpose
This document describes procedures for implementing Voice over IP (VoIP) applications on IP
networks using Avaya Communication Manager administration. It is intended primarily for
persons involved in planning, designing, or administering VoIP networks. For installation or
upgrade procedures between VoIP components or for connecting adjuncts and peripherals to a
configuration, refer to the upgrades and installation documents for the respective equipment.

Changes from the previous version

This version of Administration for Network Connectivity, Issue 12, has been changed to focus
more closely on procedural information related to IP telephony implementation. The following
changes were made:
● Modification of chapter 1, "Networking Overview." Most of the information previously in this
chapter is duplicated in other documents and has been condensed or removed. A large
section providing descriptions of port network connectivity (PNC) configurations, including
detailed diagrams, has been added to this chapter and removed from the Hardware
Description document.
● Update of chapters 3 and 4, "Administering Converged Networks" and "Network Quality
Administration." These chapters have been updated for release 4.0 of Communication
Manager.
● Removal of chapters 5 and 6: "Administering Dedicated Networks" and "Feature
Interactions and Considerations." These chapters contain mostly descriptive information
about circuit-switched Definity networks and can be accessed in the previous version of
this book, Issue 11, February 2006.
● Removal of Appendixes A and B: "Using IP Routes" and Internet Control Message
Protocol (ICMP) ECHO messages." The material in these appendixes is unchanged for
the release 4.0 of Communication Manger and can be accessed in the previous version of
this book, Issue 11, February 2006.
The descriptive material that was removed from this version of Administration for Network
Connectivity is available in the previous version: Issue 11, February 2006. Some of the removed
material is duplicated by similar material in:
● Hardware Description and Reference for Avaya Communication Manager, 555-245-207
● Avaya Application Solutions: IP Telephony Deployment Guide, 555-245-600

Issue 12 February 2007 11

About this document

Content
The information in this book is presented as follows:
● Chapter 1: Networking overview provides an overview of network connectivity and IP
addressing.
● Chapter 2: Control Networks for S8700-Series and S8500 Media Servers provides
information on how to set up control networks.
● Chapter 3: Administering converged networks provides procedures for initial
administration of server-to-gateway connections, including a sample network configuration
procedure with administration screens, IP trunks using H.323 IP connections, DCS AUDIX
and CMS adjunct administration, installing and administering Avaya IP telephones, and
administering IP-to-IP connections.
● Chapter 4: Network quality administration provides instructions for administering Quality of
Service on telephony and network equipment.

12 Administration for Network Connectivity for Avaya Communication Manager

Chapter 1: Networking overview

This chapter provides background information to help you understand and use the information
in this book. Telephony delivered over digital networks capitalizes on the flexibility of technology
itself, and can be implemented in a variety of ways. Users might find that they need to reference
only a portion of the information in this book. Other readers might need most of its information
before understanding how to tailor a telephony network to suit their needs.

About “network” terminology

An Avaya Communication Manager network can contain multiple interconnected media servers
and all of the equipment, including data networking devices, controlled by those media servers.
Such equipment may be geographically dispersed among a variety of sites, and the equipment
at each site may be segregated into distinct logical groupings, referred to as network regions. A
single media server system has one or more network regions. Each network region is a logical
grouping of endpoints, including stations, trunks, and media gateways. In cases where one
media server is insufficient for controlling all of the equipment, multiple systems can be
networked together. So, one or more network region(s) comprise a site, and one or more sites
comprise a system, which in turn is a component of a network.
For the purposes of this book and to clarify what we mean by the word, consider these uses of
the word “network”:
● Businesses often have a “corporate network,” meaning a Local Area Network (LAN) or a
Wide Area Network (WAN), over which they distribute E-mail, data files, run applications,
access the Internet, and send and receive fax and modem calls.
We use non-dedicated to describe this type of network and the traffic that it bears. This
means that the network is a heterogeneous mix of data types.
● When a non-dedicated network carries digitized voice signals along with other data types,
we call this a converged network, because it is a confluence of voice and non-voice data.
● Network segments that exclusively carry telephony traffic are dedicated, since they carry
only telephony-related information.
● When a digital network carries telephony and non-telephony data in a packet-switched
(TCP/IP), instead of a circuit-switched (TDM) environment, we call this an IP network.

Issue 12 February 2007 13

Networking overview

About digital telephone calls

A digital phone call consists of voice (bearer) data and call-signaling messages. Some
transmission protocols require sending signaling data over a separate network, virtual path, or
“channel,” from the voice data. The following list describes the data that are transmitted
between switches during a phone call:
● Voice (bearer) data — digitized voice signals
● Call-signaling data — control messages
- Set up the call connection
- Maintain the connection during the call
- Tear down the connection when the call is finished
● Distributed Communications System (DCS) signaling data — an Avaya DEFINITY®
Server proprietary signaling protocol also supported by Avaya IP Telephony Systems.
Distributed Communications System (DCS) allows two or more communications switches to
be configured as if they were a single switch. DCS provides attendant and voice-terminal
features between these switch locations. DCS simplifies dialing procedures and allows
transparent use of some Communication Manager features. Feature transparency means
that features are available to all users on DCS regardless of the switch location.

About network regions

A network region is a group of IP endpoints that share common characteristics and resources.
Every IP endpoint on an Avaya Communication Manager system belongs to a network region.
By default, all IP endpoints are in network region 1. If left that way, all IP endpoints would all
share the same characteristics defined by network region 1 and use the same resources. But in
many cases, this is not sufficient to allow for certain differences that may be based upon
location or network characteristic, and therefore multiple network regions should be configured.
The most common of these cases are:
● One group of endpoints requires a different CODEC (COder-DECoder) set than another
group.
This could be based on requirements related to bandwidth or encryption.
● Calls between separate groups of endpoints require a different codec set than calls within
a single group of endpoints, again based on requirements related to bandwidth or
encryption.
● Specific C-LAN or MedPro or other resources must be accessible to only a specific group
of endpoints.

14 Administration for Network Connectivity for Avaya Communication Manager

 Establishing inter-switch trunk connections

● One group of endpoints requires a different UDP port range or QoS parameters than
another group.
● One group of endpoints reports to a different VoIP Monitoring Manager server than
another group.
Somewhat related to network regions is the concept of locations. The location parameter is
used to identify distinct geographic locations, primarily for call routing purposes. In other words,
the location parameter is used primarily to ensure that calls access the proper trunks, based on
the origin and destination of each call.

Establishing inter-switch trunk connections

Connected switches enable people within an enterprise to communicate easily with one
another, regardless of their physical location or the particular communications server they use.
Inter-switch connections also provide shared communications resources such as messaging
and Call Center services.
Switches communicate with each other over trunk connections. There many types of trunks that
provide different sets of services. Commonly-used trunk types are:
● Central Office (CO) trunks that provide connections to the public telephone network
through a central office.
● H.323 trunks that transmit voice and fax data over the Internet to other systems with H.323
trunk capability.
H.323 trunks that support DCS+ and QSIG signaling.
● Tie trunks that provide connections between switches in a private network.
These and other common trunk types are described in the Administrator Guide for Avaya
Communication Manager, 03-300509.

Interconnecting port networks

Note:
Note: See Port network configurations with S8500 and S8700-series Media Servers on
page 23 for detailed examples of IP-connected (IP-PNC) and fiber-connected
(fiber-PNC) port networks.
Avaya systems with more than three fiber-connected port networks (fiber-PNC, formerly called
"Multi-Connect") must use a center stage switch (CSS) or an ATM configuration to interconnect
the port networks.

Issue 12 February 2007 15

Networking overview

Networking branch offices

For Avaya Communication Manager environments, The MultiVOIP™ voice over IP gateways
(Multi-Tech Systems, Inc.) provide distributed networking capabilities to small branch offices of
large corporations. MultiVOIP extends the call features of a centralized Avaya Media Server
and provides local office survivability to branch offices of up to 15 users using analog or IP
phones.
For more information, see: http://www.multitech.com/PARTNERS/Alliances/Avaya/.

Control networks
Control networks are the networks over which media servers, such as the S8700-series or
S8500 Media Servers, exchange signaling data with the port networks through the IPSI circuit
packs.
With Communication Manager 3.0 and later, Avaya extends “Control Network on Customer
LAN” functionality to simplify network configuration by allowing both IP-PNC and fiber-PNC port
networks in a single configuration. With this combined port network functionality, enterprises
can attach IP-connected, ATM-connected, or center-stage-connected port networks to their
S8700-series or S8500 media servers.
To support combined port networks, Avaya has enhanced the flexibility of control networks for
port network attachment. In addition to private control networks A and B, Avaya allows the
“Customer LAN” Ethernet interface to be used as a third, public control network, control network
C.
Note:
Note: See Chapter 2: Control Networks for S8700-Series and S8500 Media Servers on
page 103 for more information about control networks.

Enabling spanning tree protocol (STP)

Spanning Tree Protocol (STP) is a loop avoidance protocol. If you don't have loops in your
network, you don't need STP. The "safe" option is to always leave STP enabled. Failure to do so
on a network with a loop (or a network where someone inadvertently plugs the wrong cable into
the wrong ports) can lead to a complete cessation of all traffic.
However, STP is slow to converge after a network failure, and slow to allow a new port into the
network (~50 sec by default).
A modified version of STP, Rapid Spanning Tree converges faster than the earlier STP, and
enables new ports much faster (sub-second) than the older protocol. Rapid Spanning Tree
works with all Avaya equipment, and is recommended by Avaya.

16 Administration for Network Connectivity for Avaya Communication Manager

 Network quality management

Inter-Gateway Alternate Routing (IGAR)

For single-server systems that use the IP-WAN to connect bearer traffic between port networks
or media gateways, Inter-Gateway Alternate Routing (IGAR) provides a means of alternately
using the PSTN when the IP-WAN is incapable of carrying the bearer connection. IGAR may
request that bearer connections be provided by the PSTN under the following conditions:
● The number of calls allocated or bandwidth allocated via Call Admission Control-
Bandwidth Limits (CAC-BL) has been reached.
● VoIP RTP resource exhaustion in a MG/PN is encountered.
● A codec set is not specified between a network region pair.
● Forced redirection between a pair of network regions is configured.
IGAR takes advantage of existing public and private-network facilities provisioned in a network
region. Most trunks in use today can be used for IGAR. Examples of the better trunk facilities for
use by IGAR would be:
● Public or Private ISDN PRI/BRI
● R2MFC
IGAR provides enhanced Quality of Service (QoS) to large distributed single-server
configurations.

Dial Plan Transparency

Dial Plan Transparency (DPT) preserves the dial plan when a media gateway registers with an
LSP or when a port network registers with an ESS due to the loss of contact with the primary
controller. DPT establishes a trunk call and reroutes the call over the PSTN to connect
endpoints that can no longer connect over the corporate IP network.

Network quality management

A successful Voice over Internet Protocol (VoIP) implementation involves quality of service
(QoS) management that is impacted by three major factors:
● Delay: Significant end-to-end delay may result in echo and talker overlap.
● Packet Loss: Under peak network loads and periods of congestion, voice data packets
may be dropped.
● Jitter (Delay Variability): Jitter results when data packets arrive at their destination at
irregular intervals as a result of variable transmission delay over the network.

Issue 12 February 2007 17

Networking overview

Note:
Note: For more information about these QOS factors and network quality management,
see:
- Chapter 4: Network quality administration on page 201
- Avaya Application Solutions: IP Telephony Deployment Guide, 555-245-600

About VoIP-transmission hardware

The following circuit packs are essential in an Avaya telecommunications network.
For more information about these and other Avaya hardware devices, see Hardware
Description and Reference for Avaya Communication Manager, 555-245-207.
For information about the administration tasks for this equipment, see Setting up VoIP
hardware on page 117.
● TN799DP control LAN (C-LAN) interface
The TN799DP control LAN (C-LAN) interface provides TCP/IP connectivity over Ethernet
between media servers and gateways or Point to Point Protocol (PPP) between media
servers and adjuncts.
● TN2312BP IP Server Interface (IPSI)
The IPSI provides for the transport of control messages between media servers and port
networks.
● TN2302AP IP Media Processor and TN2602AP IP Media Resource 320
The TN2302AP and TN2602AP provide high-capacity VoIP audio access to the switch for
local stations and outside trunks.
● TN8400AP Media Server circuit pack
The TN8400 Media Server circuit pack is the hardware platform for an S8400 Media Server,
which is a Linux-based server that occupies a single slot in a standard TN carrier.
● TN8412AP S8400 server IP Interface (SIPI)
The SIPI is used in an S8400-based system to provide transport of control messages
between the S8400 Media Server and the media server’s port network (PN) using direct
connections.
● H.248 media gateways
The H.248 media gateways include the G700, G250, G350, G860, and IG550.
The H.248 media gateways provide:
- Extension of Communication Manager telephony features to branch offices when
controlled by a remote media server.

18 Administration for Network Connectivity for Avaya Communication Manager

 About VoIP-transmission hardware

- Standalone telephony systems when controlled by an embedded S8300 Media Server.

- Local Survivable Processor (LSP) backup for a remote media server.
● MM760 VoIP Media Module
The MM760 VoIP Media Module is a clone of the G700 motherboard VoIP engine. The
MM760 provides an additional 64 VoIP channels in the G700.

Processor Ethernet (PE)

Much like a C-LAN board, Processor Ethernet provides connectivity to IP endpoints, gateways,
and adjuncts. The PE interface is a logical connection in the Communication Manager software
that uses a port on the NIC in the server (that is, the s-called “native NIC”). No additional
hardware is needed to implement PE. Processor Ethernet uses the PROCR IP-interface type.
During the configuration of a server, the PE is assigned to a Computer Ethernet (CE). The PE
and the CE share the same IP address, but are very different in nature. The CE interface is a
native computer interface while the PE interface is the logical appearance of the CE interface
within Communication Manager software. The interface that is assigned to the PE can be a
control network or a corporate LAN. The interface that is selected determines which physical
port the PE uses on the server. For more information on how to configure the server, see the
Administrator Guide for Avaya Communication Manager, 03-300509.
The PE interface is enabled automatically on a Local Survivable Processor (LSP) or an
Enterprise Survivable Server (ESS). On an LSP, the H.248 and the H.323 fields default to a yes
on the ip-interface procr screen to allow the registration of H.248 gateways and H.323
endpoints using the PE interface. While the PE interface on a simplex ESS provides support for
adjunct connectivity, it does not support H.248 gateway and H.323 endpoint registration.
Therefore the H.248 and H.323 fields on the ESS’ ip-interface procr screen default to a no.
Note:
Note: The PE interface can be enabled but not administered with no adverse effects on
the system.

! CAUTION:
CAUTION: Both the ESS and the LSP require the use of the PE interface to register to the
main call server. Do not disable the PE interface on an ESS server or an LSP.

Issue 12 February 2007 19

Networking overview

Providing LAN security

Some customers are concerned that a user could access the switch using the INADS line, gain
access to C-LAN, and then access to the customer’s LAN. The Avaya architecture prevents
access to the customer’s LAN as depicted in Figure 1: Security-related system architecture on
page 20, which shows a high-level switch schematic with a TN799 (C-LAN) circuit pack.

Figure 1: Security-related system architecture

PSTN Processor C-LAN

Avaya
Communication Firmware
Modem Manager

Internal
bus
INADS Ethernet
UART
line T/R

segment
LAN
cydflan1 LAO 031105

Logins through the INADS line terminate in software; software communicates with firmware
over an internal bus through a limited message set. There are two main reasons why a user
cannot access a customer’s LAN through the INADS line:
● A user logging into software cannot obtain direct access to the C-LAN firmware.
The user can only enter SAT commands that request C-LAN information or to configure
C-LAN connections.
● The C-LAN application TFTP is currently disabled and cannot be enabled by Avaya
Communication Manager.
TELNET only interconnects C-LAN Ethernet clients to the system management application
on the switch. FTP exists only as a server, is used only for firmware downloads, and it
cannot connect to the client network.

20 Administration for Network Connectivity for Avaya Communication Manager

 Connection Preservation

Connection Preservation
The Connection Preserving Migration (CPM) feature preserves existing bearer (voice)
connections while an H.248 media gateway migrates from one Communication Manager server
to another because of network or server failure. However, users on connection-preserved calls
cannot use such features as Hold, Conference, or Transfer, etc. In addition to preserving the
audio voice paths, CPM extends the time period for recovery operations and functions during
Avaya’s complementary recovery strategies:
● H.248 and H.323 Link Recovery
● Auto fallback to primary
● Local Survivable Processor (LSP)
● Enterprise Survivable Server (ESS)
● Standard Local Survivability (SLS) on the G250 Media Gateway only

H.248 and H.323 Link Recovery

H.248 Link Recovery is an automated way in which the media gateway reacquires the H.248
link when it is lost from either a primary call controller or an LSP. The H.248 link between a
media server running Avaya Communication Manager and a media gateway, and the H.323 link
between a media gateway and an H.323-compliant IP endpoint, provide the signaling protocol
for:
● Call setup
● Call control (user actions such as Hold, Conference, or Transfer) while the call is in
progress
● Call tear-down
If the link goes down, Link Recovery preserves any existing calls and attempts to re-establish
the original link. If the gateway/endpoint cannot reconnect to the original server/gateway, then
Link Recovery automatically attempts to connect with alternate TN799DP (C-LAN) circuit packs
within the original server’s configuration or to a Local Survivable Processor (LSP).

Auto fallback to primary

The intent of the auto fallback to primary controller feature is to return a fragmented network, in
which a number of H.248 Media Gateways are being serviced by one or more LSPs (Local
Survivable Processors), to the primary media server in an automatic fashion. This feature is
targeted towards all H.248 media gateways. By migrating the media gateways back to the
primary automatically, the distributed telephony switch network can be made whole sooner
without human intervention, which is required today.

Issue 12 February 2007 21

Networking overview

Local Survivable Processor (LSP)

Either an S8300 or S8500 Media Server can act as survivable call-processing servers for
remote or branch customer locations. As an LSP, the S8300 Media Server carries a complete
set of Communication Manager features, and its license file allows it to function as a survivable
call processor. If the link between the remote G700/G350 media gateway(s) and the primary
controller is broken, those telephones and media gateways that are designated to receive
backup service from the LSP will register with the LSP. The LSP will provide control to those
registered devices in a license error mode (see Hardware Description and Reference for Avaya
Communication Manager, 555-245-207).
Note:
Note: The LSP, in contrast to the Standard Local Survivability (SLS) feature on the
G250 Media Gateway, is also known as ELS, or Enhanced Local Survivability.

Enterprise Survivable Server (ESS)

The Enterprise Survivable Server (ESS) feature provides survivability to port networks by
allowing backup servers to be placed in various locations in the customer’s network. The
backup servers supply service to port networks in the case where the Avaya S8500 Media
Server, or S8700-series Media Server pair fails, or connectivity to the main Communication
Manager server(s) is lost. Servers for ESS can be either S8500 or S8700-series media servers,
and offer full Avaya Communication Manager functionality when in survivable mode, provided
sufficient connectivity exists to other Avaya components (for example, endpoints, gateways,
and messaging servers).

Standard Local Survivability (SLS)

Standard Local Survivability (SLS) consists of a module built into the G250 Media Gateway to
provide partial backup media gateway controller functionality, in the event that the connection
with the primary controller is lost. This feature allows a G250, with no S8300 installed locally, to
provide a degree of Communication Manager functionality when no link is available to an
external controller. It is configured on a system-wide basis, or, alternatively, it can be configured
on an individual G250 using the CLI.

22 Administration for Network Connectivity for Avaya Communication Manager

 Port network configurations with S8500 and S8700-series Media Servers

Port network configurations with S8500 and S8700-series

Media Servers
The S8500 and S8700-series Media Servers can control call processing of port networks in a
large variety of ways. Control networks can be established using Ethernet connections only or a
combination of Ethernet connections and fiber connections (direct-connect, CSS, or ATM).
Voice, fax, TTY, and modem transmission can occur over the LAN/WAN connections, fiber
connections, or both. Reliability with the S8700-series Media Server can include single control
and bearer networks (standard reliability), duplicated control networks (high reliability),
duplicated control and bearer networks (critical reliability), or a combination of reliabilities.
Each of the following configurations show how the various options can be used. Configurations
with both IP-PNC and fiber-PNC PNs on page 79 describes the possibilities and considerations
when fiber-PNC options are combined with IP-PNC options.

Fiber-PNC and IP-PNC

Fiber port network connectivity (fiber-PNC) uses fiber connections and/or DS1-C
connections between port networks (PNs) for the following:
● Voice/data bearer transmission
● Control signaling from the server to PNs that do not have a control TN2312BP IPSI circuit
pack
● Sharing of Touch-tone Receiver (TTR) and media processor resources. If these resources
are not available in one fiber-PNC PN, these resources on another fiber-PNC PN can be
used across the fiber links.
Fiber-PNC includes Direct Connect, Center Stage Switch (CSS), and ATM configurations. One
or more PNs in the CSS or ATM configurations have an IPSI connection to the server for control
signaling. Only one PN in a Direct Connect configuration has an IPSI connection.
IP port network connectivity (IP-PNC) uses LAN/WAN connections exclusively between port
networks for bearer transmission and control signaling from the server. Each PN must have
either one or two control ISPI circuit packs for control signaling.
An S8500 or S8700-series Media Server can support both types of port network connectivity
simultaneously within a single Communication Manager configuration.

Issue 12 February 2007 23

Networking overview

Reliability
Reliability is the ability of a Communication Manager configuration to maintain service when
components such as Ethernet switches, circuit packs, or gateways within the configuration fail.
The available reliability levels and their precise definitions depend on whether the port networks
use IP-PNC or fiber-PNC and whether the server is an S8500 or S8700-series Media Server.

S8500 Media Server

An S8500-series Media Server has several reliability options, and the implementation of
reliability levels differs somewhat between fiber-PNC and IP-PNC.

Fiber-PNC
● Standard reliability
For fiber-PNC, an S8500 Media Server supports only Direct Connect with up to 3 fiber-PNC
PNs. This configuration supports a single control IPSI in one of the fiber-PNCs. IPSIs in
other PNs serve only as tone clocks and do not carry control signaling. There can be only a
single fiber connection between each of the fiber PNs.

IP-PNC
● Standard reliability
For IP-PNC, an S8500 Media Server supports a single IPSI for control in every IP-PNC PN.
TN2302BP or TN2602AP circuit packs are used for the bearer network. However,
TN2602AP circuit packs are implemented in load-balancing mode only.
● Duplicated bearer reliability
For IP-PNC, an S8500 Media Server does not support duplicated control. However, any or
all IP-PNC PNs may have duplicated TN2602AP circuit packs to duplicate the bearer
connections. Control signaling to a PN with duplicated TN2602AP circuit packs always
occurs over a direct IPSI connection to the server. Duplicated bearer using TN2602AP
circuit packs is implemented for individual PNs and does not require uniform
implementation for all PNs within the configuration.

S8700-series Media Server

An S8700-series Media Server has multiple levels of reliability, and the implementation of
reliability levels differs somewhat between fiber-PNC and IP-PNC.

24 Administration for Network Connectivity for Avaya Communication Manager

 Port network configurations with S8500 and S8700-series Media Servers

Fiber-PNC
All port networks that use fiber-PNC within a single Communication Manager configuration must
have the same level of reliability and may be one of the following:
● Standard duplex reliability — The standard S8700-series Media Server configuration
includes duplicated servers. A single IPSI circuit pack for control resides in one or more
PNs. A single fiber interface connects all fiber-PNC PNs.
● High reliability — The high reliability S8700-series Media Server configuration includes the
standard duplicated servers. In addition, duplicated IPSIs for control reside in each PN
designated to have control IPSIs. A single fiber interface connects all fiber-PNC PNs.
● Critical Reliability — The standard reliability S8700-series Media Server configuration
includes the following:
- Standard duplicated servers
- Duplicated IPSIs for control reside in each PN designated to have control IPSIs.
- Duplicated fiber interfaces connect all fiber-PNC PNs.

IP-PNC
Reliability for PNs that use IP-PNC within a single Communication Manager configuration is
implemented for individual PNs and does not require uniform implementation for other IP-PNC
PNs within the configuration. In addition, duplicated bearer and duplicated control can be
implemented independently of each other. Duplicated control is not required in order for a PN to
have duplicated bearer reliability.
An IP-PNC PN can have one of the following reliability levels:
● Standard duplicated servers
A single IPSI provides control signaling to and from the server and there are no duplicated
TN2602AP circuit packs to duplicate the bear connections, only single or load balancing
TN2302BP and/or TN2602AP circuit packs.
● Duplicated control
In addition to the standard duplicated servers, duplicated IPSIs for control reside in each
PN. The PN contains only single or load balancing TN2302BP and/or TN2602AP circuit
packs.
● Single control and duplicated bearer
In addition to the standard duplicated servers, duplicated TN2602AP circuit packs reside in
each PN. to provide duplicated bearer.
Note:
Note: Duplicated IPSI control is recommended, but not required, for duplicated bearer
for IP-PNC PNs.
● Duplicated control and bearer
In addition to the standard duplicated servers, duplicated IPSIs for control reside in each PN
and duplicated TN2602AP circuit packs reside in each PN to provide duplicated bearer.

Issue 12 February 2007 25

Networking overview

S8500 IP-PNC (single control network)

In this configuration, the S8500 Media Server uses IP connections to both control call
processing on the port networks (PNs) and to send voice between PNs over an IP network. An
existing VoIP-ready IP infrastructure can be used. This solution saves customers the cost of
building a separate telephony network. In this type of configuration, all PNs are connected to the
server and to each other over the customer’s network. Up to 64 PNs can be configured in an
IP-PNC network. Depending on the type of Ethernet switches used to connect PNs, the number
of PNs, and the PN locations in the LAN and WAN, the network may require multiple Ethernet
switches to support the PNs.
Only the G650 media gateway is available for new installations. However, because different
migrations from older systems are supported, the following media gateways can be used in an
IP-PNC network:
● G650 media gateway
A G650 PN can consist of one to five G650 gateways in a stack connected by a TDM/LAN
bus cable. One gateway, serving as control gateway in position A at the bottom of the stack,
contains the following:
- TN2312BP IPSI circuit pack
● G600 media gateway
A PN can consist of one to four G600 gateways in a stack connected by a TDM/LAN bus
cable. One gateway, serving as control gateway in position A at the bottom of the stack,
contains the following:
- TN2312AP/BP IPSI circuit pack
Note:
Note: The TN2314 Processor and TN744E Call Classifier and Tone Detector circuit
packs, needed for the S8100 model, are not used and must be removed if the
G600 is being migrated from an S8100 Media Server. All gateways are port
gateways, though the bottom gateway (serving as control cabinet A) contains the
IPSI circuit pack.
● CMC1 media gateway
A PN can consist of one to three CMC1 gateways in a stack connected by a TDM/LAN bus
cable. One gateway, serving as control gateway in position A at the bottom of the stack,
contains the following:
- TN2312AP/BP IPSI circuit pack
Note:
Note: The TN795 processor board, needed for the CSI model, is not used and must be
removed if the CMC1 is being migrated from a DEFINITY server. The CMC1 or
CMC1 stack may not be used with additional PNs.

26 Administration for Network Connectivity for Avaya Communication Manager

 Port network configurations with S8500 and S8700-series Media Servers

IP/TDM conversion resource - Each PN must contain at least one TN2302AP IP Media
Interface or TN2602AP IP Media Resource 320 circuit pack. The TN2302AP or TN2602AP
circuit pack provides IP-TDM voice processing of endpoint connections between PNs. These
circuit packs may be inserted in any gateway in the PN. Each PN may optionally house a
TN799DP C-LAN circuit pack for control of the G150 Media Gateway, the H.248 media
gateways (G700, G350, G250), IP endpoints, adjunct systems such as messaging, and
firmware downloads.

Ethernet connections. - In the IP-PNC configuration, the S8500 Media Server connects to the
media gateways through a single Ethernet switch. Each PN also has a connection to the S8500
Media Server through a local Ethernet switch. As a result, remote PNs in an IP-PNC
configuration over a WAN, which normally requires routers to complete the connection, may
require their own Ethernet switches, in addition to the Ethernet switch that supports the S8500
Media Server. IP connections to the S8500 Media Server may be administered as dedicated
private LAN connections or connections over the customer LAN.

Duplicated TN2602AP circuit packs in IP-PNC PNs

For an S8500 Media Server, any individual IP-PNC PN can contain load-balancing or duplicated
TN2602AP circuit packs. However, TN2602AP circuit packs do not need to be implemented
uniformly within the system. Thus, some PNs may have a single TN2602AP circuit pack, some
PNs may have load-balancing TN2602AP circuit packs, and some PNs may have duplicated
TN2602AP circuit packs. Thus, an S8500 Media Server can have duplicated bearer
connections, even though it does not support duplicated control.

Issue 12 February 2007 27

Networking overview

Figure 2: S8500 IP-PNC

1
disc

2
8
LNK COL Tx Rx FDX Hspd LAG PoE 2 4 6 8 10 12 14 16 18 20 22 24

ROUT SYS PWR

S1 S2 1 3 5 7 9 11 13 15 17 19 21 23

2
LNK COL Tx Rx FDX Hspd LAG PoE 2 4 6 8 10 12 14 16 18 20 22 24

ROUT SYS PWR

S1 S2 1 3 5 7 9 11 13 15 17 19 21 23

3 3 3

5 5 5
6 6 6

4 4 4

cycm3001 LAO 030505

Figure notes: S8500 IP-PNC

1. S8500C or S8500B Media Server

2. Ethernet Switch. For local LAN connections, the same Ethernet switch may connect both the media servers and the media
gateways. For remote LAN/WAN connections the remote gateway(s) must have an Ethernet switches at the remote
location.

3. PNs (G650 Media Gateway or stack [shown in figure]). May also be a G600 or CMC1 Media Gateway or stack from an
S8100 or DEFINITY Server CSI migration, an MCC1 Media Gateway from a DEFINITY Server SI or R migration, or an
SCC1 Media Gateway.

1 of 2

28 Administration for Network Connectivity for Avaya Communication Manager

 Port network configurations with S8500 and S8700-series Media Servers

Figure notes: S8500 IP-PNC (continued)

4. PN control gateway in the A position in the gateway stack which contains:

● A TN2312AP/BP IPSI circuit pack for IP connection to server.

NOTE: For the G650 Media Gateway, the BP version of the TN2312 is required in order to provide environmental
maintenance.

5. IPSI-to-server control network connection via Ethernet switch

6. LAN connections of TN2302AP IP Media Interface or TN2602AP IP Media Resource 320 for IP-TDM voice processing and
optional TN799DP C-LAN for control of IP endpoints
NOTE: The number of TN2302AP, TN2602AP, and TN799DP circuit packs varies, depending on the number of IP
endpoints, PNs, and adjunct systems. These circuit packs may be inserted into a port gateway (shown in figure) or
the PN control gateway.

7. Customer LAN/WAN

8. LAN connections of media servers for remote administration

2 of 2

S8500 direct-connect (single control network)

In this configuration, one PN is connected to the server over an Ethernet connection. Fiber links
connect up to two additional PNs to each other. This configuration also requires either a
dual-NIC card in the S8500 Media Server or an interim Ethernet switch so that the S8500 Media
Server can have an Ethernet port to the customer LAN and a dedicated Ethernet connection to
the media gateways.

IPSI-connected PN
Only the G650 media gateway is available for new installations. However, because different
migrations from older systems are supported, the PN connected to the S8500 Media Server can
consist of one of three gateways:
● G650 media gateway
A G650 PN can consist of one to five G650 gateways in a stack connected by a TDM/LAN
bus cable. One gateway, serving as control gateway in position A at the bottom of the stack,
contains the following:
- TN2312BP IPSI circuit pack
● SCC1 media gateway
An SCC1 PN can consist of one to four SCC1 gateways in a stack connected by a TDM/
LAN bus cable. One gateway, serving as control gateway in position A at the bottom of the
stack, contains the following:
- TN2312AP/BP IPSI circuit pack

Issue 12 February 2007 29

Networking overview

Note:
Note: The TN2404 and TN2401 processor circuit packs, needed for the SI model, are
not used and must be removed if the SCC1 is being migrated from a DEFINITY
server.
● MCC1 media gateway
An MCC1 PN has from one to five carriers in an MCC1 gateway connected by a TDM/LAN
bus cables. One carrier, serving as control carrier in position A in the middle of the stack,
contains the following:
- TN2312AP/BP IPSI circuit pack
Note:
Note: The control carrier for a DEFINTY Server SI or R is not used and must be
removed and replaced with an expansion control carrier if the MCC1 is being
migrated. The processor circuit packs, needed for the SI or R models, are not
used and must be removed. Other PNs can also be MCC1 Gateways.

PNs not IPSI-connected

In a S8500 direct-connect configuration, additional PNs (up to two only) may be connected
using fiber optic cable. The additional PNs connect to the IPSI-connected PN using fiber optic
cable between external interface (EI) TN570B (version 7 or later) circuit packs. The cables are
connected to the circuit packs using short-range or long-range multi-mode transceivers, or
single-mode transceivers, depending on the distance between PNs.
The TN570B circuit packs reside in the control carrier (MCC1) or control gateway (G650 or
SCC1) of each PN. The control carrier or gateway in each additional PN also must contain a
TN2182C Tone Clock circuit pack (SCC1 or MCC1) or a maintenance-only TN2312BP IPSI
circuit pack (G650).
Note:
Note: Straight fiber connections between TN570B circuit packs may be up to 200 feet
(61 meters) (see TN570B Expansion Interface PN connections up to 200 ft. on
page 75). If the distance between PNs is greater, Light guide interface units
(LIUs) must also be used to connect the fiber cables or the connection must use
TN1654 DS1 converters. Lengths of fiber, including connections through LIUs or
DS1 converters, are:
- 4900 feet (1493.5 meters) (see TN570B Expansion Interface PN connections up to
4900/25000 ft. and 22 miles. on page 76)
- 25,000 feet (7620 meters) in multimode (see TN570B Expansion Interface PN
connections up to 4900/25000 ft. and 22 miles. on page 76)
- 21.7 miles (34.9 kilometers) in single mode (see TN570B Expansion Interface PN
connections up to 4900/25000 ft. and 22 miles. on page 76)
- 200 miles (322 kilometers) (see TN1654 DS1 Converter/TN570B Expansion
Interface PN connections up to 200 miles. on page 78)

30 Administration for Network Connectivity for Avaya Communication Manager

 Port network configurations with S8500 and S8700-series Media Servers

Note:
Note: You cannot connect additional PNs that contain CMC1 or G600 Media Gateways.

TN2602AP circuit packs for duplicated bearer

For an S8500 Media Server, any individual fiber-PNC PN can contain load-balancing or
duplicated TN2602AP circuit packs. However, TN2602AP circuit packs do not need to be
implemented uniformly within the system. Thus, some PNs may have no TN2602AP circuit
pack, some PNs may have load-balancing TN2602AP circuit packs, and some PNs may have
duplicated TN2602AP circuit packs. Thus, an S8500 Media Server can have duplicated bearer
connections, even though it does not support duplicated control.

Rules for TN570B circuit pack placement with SCC1/MCC1

Media Gateways
Fiber-PNC MCC1 and SCC1 Media Gateways have rules on the placement of TN570B External
Interface circuit packs in direct connect configurations. See Rules for TN570B circuit pack
placement with SCC1/MCC1 Media Gateways on page 50. However, for MCC1/SCC1 Media
Gateways configured with an S8500 Media Server, only the rules that apply to single control
networks apply.

Issue 12 February 2007 31

Networking overview

Figure 3: S8500 direct-connect

1
disc

2 11
LNK COL Tx Rx FDX Hspd LAG PoE 2 4 6 8 10 12 14 16 18 20 22 24

ROUT SYS PWR

S1 S2 1 3 5 7 9 11 13 15 17 19 21 23

3 5

7 10 10 10

4 6
6

8 8
8
cycm3002 LAO 030505
Figure notes: S8500 direct-connect

1. S8500C or S8500B Media Server

2. LAN connections of media server for remote administration

3. IPSI-connected PN (G650 Media Gateway or G650 stack [shown in figure], MCC1 Media Gateway or SCC1 Media
Gateway or SCC1 stack).
NOTE: G600 or CMC1 Media Gateways can be used in IP-PNC configurations only.

4. Media gateway (G650) or expansion port network (EPN) control gateway (SCC1) or carrier (MCC1), in the A position,
which contains:
● A TN2312AP/BP IPSI circuit pack for IP connection to server.

NOTE: For the G650 Media Gateway, the BP version of the TN2312 is required in order to provide
environmental maintenance.
● Two TN570B EI circuit packs for bearer and control network connections to the other two PNs (if any).

5. PN (G650 Media Gateway or G650 stack [shown in figure], MCC1 Media Gateway, or SCC1 Media Gateway or SCC1
stack).

1 of 2

32 Administration for Network Connectivity for Avaya Communication Manager

 Port network configurations with S8500 and S8700-series Media Servers

Figure notes: S8500 direct-connect (continued)

6. PN control gateway or carrier, which contains two TN570B EI circuit packs for bearer and control network connections to
the other two PNs.
NOTE: One TN2182C Tone Clock circuit pack must also be present per PN if the PN(s) consist of SCC1 or MCC1
Media Gateways. One maintenance-only TN2312BP IPSI circuit pack must be present per PN if the PN(s) consist of
G650 Media Gateways.
The control gateway or carrier is always in the A position in the MCC1 or gateway stack.

7. IPSI-to-server control network connection. Requires dual NIC card on the media server.

8. TN 570B/570B fiber connections between PNs

9. Customer LAN

10. LAN connections, if any, of optional TN2302AP IP Media Interface or TN2602AP IP Media Resource 320 for IP-TDM voice
processing
NOTE: At least one TN799DP C-LAN may optionally be present for the system for control of IP endpoints, adjunct
systems such as messaging, and firmware downloads.
NOTE: The number of TN2302AP, TN2602AP, and TN799DP circuit packs varies, depending on the number of IP
endpoints, PNs, and adjunct systems. These circuit packs are optional for PNs in a direct-connect network and may
be inserted into a port carrier (shown in figure) or the PN control carrier. However, the C-LAN circuit pack is required
for downloads of firmware updates.

2 of 2

S8700-series IP-PNC (single control network)

In this configuration, the S8700-series Media Servers connect to one PN or multiple PNs over
an Ethernet connection using either an interim Ethernet switch and a dedicated LAN connection
or the customer’s LAN. Each PN is connected to the Ethernet switch or LAN with a CAT5 cable
to a TN2312AP/BP IP Server Interface (IPSI) card.
This solution saves customers the cost of building a separate telephony network. In this type of
configuration, all PNs are connected to the customer’s network and call control from the
S8700-series Media Server is also sent over the customer’s network. Up to 64 PNs can be
configured in an IP-PNC network.
Only the G650 media gateway is available for new installations. However, because different
migrations from older systems are supported, the following media gateways can be used in an
IP-PNC network:
● G650 media gateway
A G650 PN can consist of one to five G650 gateways in a stack connected by a TDM/LAN
bus cable. One gateway, serving as control gateway in position A at the bottom of the stack,
contains the following:
- TN2312BP IPSI circuit pack

Issue 12 February 2007 33

Networking overview

● G600 media gateway

A PN can consist of one to four G600 gateways in a stack connected by a TDM/LAN bus
cable. One gateway, serving as control gateway in position A at the bottom of the stack,
contains the following:
- TN2312AP/BP IPSI circuit pack
Note:
Note: The TN2314 Processor and TN744E Call Classifier and Tone Detector circuit
packs, needed for the S8100 model, are not used and must be removed if the
G600 is being migrated from an S8100 Media Server. All gateways are port
gateways, though the bottom gateway (serving as control cabinet A) contains the
IPSI circuit pack.
● CMC1 media gateway
A PN can consist of one to three CMC1 gateways in a stack connected by a TDM/LAN bus
cable. One gateway, serving as control gateway in position A at the bottom of the stack,
contains the following:
- TN2312AP/BP IPSI circuit pack
Note:
Note: The TN795 processor board, needed for the CSI model, is not used and must be
removed if the CMC1 is being migrated from a DEFINITY server. The CMC1 or
CMC1 stack may not be used with additional PNs.

IP/TDM conversion resource - Each PN must contain at least one TN2302AP IP Media
Interface or TN2602AP IP Media Resource 320 circuit pack. The TN2302AP or TN2602AP
circuit pack provides IP-TDM voice processing of endpoint connections between PNs. At least
one TN799DP C-LAN circuit pack may optionally be present for control of the G150 Media
Gateway, the H.248 media gateways (G700, G350, G250), IP endpoints, adjunct systems such
as messaging, and firmware downloads. These circuit packs may be inserted in any gateway in
the PN.

Ethernet connections. - In the IP-PNC configuration, the S8700-series Media Server connects
to the media gateways through a single Ethernet switch. Each PN also has a connection to the
network or the S8700-series Media Server through a local Ethernet switch. As a result, remote
PNs in an IP-PNC configuration over a WAN, which normally requires routers to complete the
connection, may require their own Ethernet switches in addition to the Ethernet switch that
supports the S8700-series Media Server. IP connections to the S8700-series Media Server may
be administered as dedicated private LAN connections or connections over the customer LAN.

34 Administration for Network Connectivity for Avaya Communication Manager

 Port network configurations with S8500 and S8700-series Media Servers

Figure 4: S8700-series IP-PNC single control network

1 1

Duplex ch 1 ch 2

Duplex ch 1 ch 2
disc disc
COMPACT COMPACT

1 1
2 2

UID UID

1
9

1
Simplex

Simplex
0

0
4

2
4

0
2
LNK COL Tx Rx FDX Hspd LAG PoE 2 4 6 8 10 12 14 16 18 20 22 24

ROUT SYS PWR

S1 S2 1 3 5 7 9 11 13 15 17 19 21 23

8 8

2
LNK COL Tx Rx FDX Hspd LAG PoE 2 4 6 8 10 12 14 16 18 20 22 24

ROUT SYS PWR

S1 S2 1 3 5 7 9 11 13 15 17 19 21 23

3 3 3

5 5 5
6 6 6

4 4 4

cycm3003 LAO 030505

Figure notes: S8700-series IP-PNC single control network
1. S8710/S8720 Media Server

2. Ethernet Switch. For local LAN connections, the same Ethernet switch may connect both the media servers and the media
gateways. For remote LAN/WAN connections, the remote gateway(s) must have an Ethernet switches at the remote
location.

3. PNs (G650 Media Gateway or stack [shown in figure]). May also be a G600 or CMC1 Media Gateway or stack from an
S8100 or DEFINITY Server CSI migration, an MCC1 Media Gateway from a DEFINITY Server SI or R migration, or an
SCC1 Media Gateway.

1 of 2

Issue 12 February 2007 35

Networking overview

Figure notes: S8700-series IP-PNC single control network (continued)

4. PN control gateway, in the A position, which contains:
● A TN2312AP/BP IPSI circuit pack for IP connection to server.

NOTE: For the G650 Media Gateway, the BP version of the TN2312 is required in order to provide
environmental maintenance.

5. IPSI-to-server control network connection via Ethernet switch

6. LAN connections of TN2302AP IP Media Interface or TN2602AP IP Media Resource 320 for IP-TDM voice processing and
optional TN799DP C-LAN for control of IP endpoints
NOTE: The number of TN2302AP, TN2602AP, and TN799DP circuit packs varies, depending on the number of IP
endpoints, PNs, and adjunct systems. These circuit packs may be inserted into a port gateway (shown in figure) or
the PN control gateway.

7. Customer LAN/WAN
8. LAN connections of media servers for remote administration

9. Duplicated server links, including the link for translations transfer and the link for control data sharing. The link for control
data sharing is implemented through the DAL2 board or (for the S8720 media server) through software duplication.

2 of 2

S8700-series IP-PNC (duplicated control network)

The S8700-series Media Server IP-PNC high reliability configuration is the same as the
standard reliability configuration, except for the following differences:
● There are duplicated Ethernet switches, with each server connected to each Ethernet
switch
● Each PN has duplicated TN2312AP/BP IPSI circuit packs. One IPSI circuit pack in each
PN is connected through one Ethernet switch and the other IPSI circuit pack is connected
through the other Ethernet switch

36 Administration for Network Connectivity for Avaya Communication Manager

 Port network configurations with S8500 and S8700-series Media Servers

Figure 5: S8700-series IP-PNC duplicated control network

1 1

Duplex ch 1 ch 2

Duplex ch 1 ch 2
disc disc
COMPACT COMPACT

1 1
2 2

UID UID

1
10

1
Simplex

Simplex
0

0
4

2
4

0
2 2
9 LNK COL Tx

ROUT SYS PWR

Rx FDX Hspd LAG PoE 2 4 6 8 10 12 14 16 18 20 22 24 LNK COL Tx

ROUT SYS PWR

Rx FDX Hspd LAG PoE 2 4 6 8 10 12 14 16 18 20 22 24
9
S1 S2 1 3 5 7 9 11 13 15 17 19 21 23 S1 S2 1 3 5 7 9 11 13 15 17 19 21 23

2 2
LNK COL Tx Rx FDX Hspd LAG PoE 2 4 6 8 10 12 14 16 18 20 22 24 LNK COL Tx Rx FDX Hspd LAG PoE 2 4 6 8 10 12 14 16 18 20 22 24

ROUT SYS PWR ROUT SYS PWR

S1 S2 1 3 5 7 9 11 13 15 17 19 21 23 S1 S2 1 3 5 7 9 11 13 15 17 19 21 23

3 3 3

7 7 7

6 6 6 6 6

5 5 5

4 4 4

cycm3004 LAO 030505

Figure notes: S8700-series IP-PNC duplicated control network

1. S8710/S8720 Media Server
2. Ethernet Switch. For local LAN connections, the same pair of Ethernet switches may connect both the media servers and
the media gateways. For remote LAN/WAN connections, the remote gateway(s) must have a pair of Ethernet switches at
the remote location.
3. PNs (G650 Media Gateway or stack [shown in figure]). May also be an SCC1 stack or MCC1 Media Gateway from a
DEFINITY Server SI or R migration.
4. PN control gateway, in the A position, which contains:
● A TN2312AP/BP IPSI circuit pack for IP connection to server.

NOTE: For the G650 Media Gateway, the BP version of the TN2312 is required in order to provide
environmental maintenance.

1 of 2

Issue 12 February 2007 37

Networking overview

Figure notes: S8700-series IP-PNC duplicated control network (continued)

5. Duplicated expansion control gateway, in the B position, which contains:
● A TN2312AP/BP IPSI circuit pack for IP connection to control network.

6. IPSI-to-server control network connection via Ethernet switch

7. LAN connections of TN2302AP IP Media Interface or TN2602AP IP Media Resource 320 for IP-TDM voice processing and
optional TN799DP C-LAN for control of IP endpoints
NOTE: The number of TN2302AP, TN2602AP, and TN799DP circuit packs varies, depending on the number of IP
endpoints, PNs, and adjunct systems. These circuit packs may be inserted into a port carrier (shown in figure), the
PN control carrier, or the duplicated control carrier.
8. Customer LAN
9. LAN connections of media servers for remote administration
10. Duplicated server links, including the link for translations transfer and the link for control data sharing. The link for control
data sharing is implemented through the DAL2 board or (for the S8720 media server) through software duplication.
2 of 2

S8700-series IP-PNC (duplicated control and duplicated bearer

network)
The S8700-series Media Server IP-PNC critical reliability configuration (duplicated control and
duplicated bearer network) is the same as the high reliability configuration, except for the
following differences:
● Each PN has duplicated TN2602AP IP Media Resource 320 circuit packs. One TN2602
circuit pack in each PN is connected through one Ethernet switch and the other TN2602
circuit pack is connected through the other Ethernet switch.
● A TN771DP Maintenance Test circuit pack must also be installed in each PN that has
duplicated control and bearer network connections.

38 Administration for Network Connectivity for Avaya Communication Manager

 Port network configurations with S8500 and S8700-series Media Servers

Figure 6: S8700-series IP-PNC duplicated control and duplicated bearer network

1 1

Duplex ch 1 ch 2

Duplex ch 1 ch 2
disc disc
COMPACT COMPACT

1 1
2 2

UID UID

1
11

1
Simplex

Simplex
0

0
4

2
4

0
10 2 2 10
LNK COL Tx Rx FDX Hspd LAG PoE 2 4 6 8 10 12 14 16 18 20 22 24 LNK COL Tx Rx FDX Hspd LAG PoE 2 4 6 8 10 12 14 16 18 20 22 24

ROUT SYS PWR ROUT SYS PWR

S1 S2 1 3 5 7 9 11 13 15 17 19 21 23 S1 S2 1 3 5 7 9 11 13 15 17 19 21 23

2 2
LNK COL Tx Rx FDX Hspd LAG PoE 2 4 6 8 10 12 14 16 18 20 22 24 LNK COL Tx Rx FDX Hspd LAG PoE 2 4 6 8 10 12 14 16 18 20 22 24

ROUT SYS PWR ROUT SYS PWR

S1 S2 1 3 5 7 9 11 13 15 17 19 21 23 S1 S2 1 3 5 7 9 11 13 15 17 19 21 23

3 3 8 3

8 8
7 7 7

6 6 6 6

5 5 5

4 4
4

cycm3026 LAO 112205

Figure notes: S8700-series IP-PNC duplicated control and duplicated bearer network
1. S8700-series Media Server
2. Ethernet Switch. For local LAN connections, the same pair of Ethernet switches may connect both the media servers and
the media gateways. For remote LAN/WAN connections, the remote gateway(s) must have a pair of Ethernet switches at
the remote location.
3. PNs (G650 Media Gateway or stack [shown in figure]). May also be an SCC1 stack or MCC1 Media Gateway from a
DEFINITY Server SI or R migration.
1 of 2

Issue 12 February 2007 39

Networking overview

Figure notes: S8700-series IP-PNC duplicated control and duplicated bearer network (continued)
4. PN control gateway, in the A position, which contains:
● A TN2312AP/BP IPSI circuit pack for IP connection to server.

NOTE: For the G650 Media Gateway, the BP version of the TN2312 is required in order to provide
environmental maintenance.
● A TN2602AP IP Media Resource 320 for PN bearer connections over the LAN

NOTE: The TN2602AP circuit pack may be placed in any gateway in the PN. However, the pair of TN2602
circuit packs should be separated between two different gateways whenever possible.
5. Duplicated expansion control gateway, in the B position, which contains:
● A TN2312AP/BP IPSI circuit pack for IP connection to control network.

● A TN2602AP IP Media Resource 320 for PN bearer connections over the LAN

NOTE: The TN2602AP circuit pack may be placed in any gateway in the PN. However, the pair of TN2602
circuit packs should be separated between two different gateways whenever possible.
6. IPSI-to-server control network connection via Ethernet switch
7. LAN connection of the TN799DP C-LAN for control of IP endpoints
NOTE: The number of TN799DP circuit packs varies, depending on the number of IP endpoints, PNs, and adjunct
systems. These circuit packs may be inserted into a port carrier (shown in figure), the PN control carrier, or the
duplicated control carrier.
8. LAN connections of TN2602AP IP Media Resource 320 circuit packs for IP-TDM voice processing
9. Customer LAN
10. LAN connections of media servers for remote administration
11. Duplicated server links, including the link for translations transfer and the link for control data sharing. The link for control
data sharing is implemented through the DAL2 board or (for the S8720 media server) through software duplication
2 of 2

Sample S8700-series IP-PNC configuration (duplicated control

and duplicated bearer)
The S8700-series Media Server IP-PNC configuration with duplicated control and duplicated
bearer network is the same as the duplicated control configuration, except for the following
differences:
● Each PN has duplicated TN2602AP IP Media Resource 320 circuit packs. One TN2602
circuit pack in each PN is connected through one Ethernet switch and the other TN2602
circuit pack is connected through the other Ethernet switch.
● A TN771DP maintenance test circuit pack is required each IP-PNC PN that has both
duplicated control and duplicated bearer.

40 Administration for Network Connectivity for Avaya Communication Manager

 Port network configurations with S8500 and S8700-series Media Servers

Figure 7: S8700-series IP-PNC duplicated control and duplicated bearer network

1 1

Duplex ch 1 ch 2

Duplex ch 1 ch 2
disc disc
COMPACT COMPACT

1 1
2 2

UID UID

1
11

1
Simplex

Simplex
0

0
4

2
4

0
10 2 2 10
LNK COL Tx Rx FDX Hspd LAG PoE 2 4 6 8 10 12 14 16 18 20 22 24 LNK COL Tx Rx FDX Hspd LAG PoE 2 4 6 8 10 12 14 16 18 20 22 24

ROUT SYS PWR ROUT SYS PWR

S1 S2 1 3 5 7 9 11 13 15 17 19 21 23 S1 S2 1 3 5 7 9 11 13 15 17 19 21 23

2 2
LNK COL Tx Rx FDX Hspd LAG PoE 2 4 6 8 10 12 14 16 18 20 22 24 LNK COL Tx Rx FDX Hspd LAG PoE 2 4 6 8 10 12 14 16 18 20 22 24

ROUT SYS PWR ROUT SYS PWR

S1 S2 1 3 5 7 9 11 13 15 17 19 21 23 S1 S2 1 3 5 7 9 11 13 15 17 19 21 23

3 3 8 3

8 8
7 7 7

6 6 6 6

5 5 5

4 4
4

cycm3026 LAO 112205

Figure notes: S8700-series IP-PNC duplicated control and duplicated bearer network
1. S8700/S8710/S8720 Media Server
2. Ethernet Switch. For local LAN connections, the same pair of Ethernet switches may connect both the media servers and
the media gateways. For remote LAN/WAN connections, the remote gateway(s) must have a pair of Ethernet switches at
the remote location.
3. PNs (G650 Media Gateway or stack [shown in figure]). May also be an SCC1 stack or MCC1 Media Gateway from a
DEFINITY Server SI or R migration.

1 of 2

Issue 12 February 2007 41

Networking overview

Figure notes: S8700-series IP-PNC duplicated control and duplicated bearer network (continued)
4. PN control gateway, in the A position, which contains:
● A TN2312AP/BP IPSI circuit pack for IP connection to server.

NOTE: For the G650 Media Gateway, the BP version of the TN2312 is required in order to provide
environmental maintenance.
● A TN2602AP IP Media Resource 320 for PN bearer connections over the LAN

NOTE: The TN2602AP circuit pack may be placed in any gateway in the PN. However, the pair of TN2602
circuit packs should be separated between two different gateways whenever possible.
5. Duplicated expansion control gateway, in the B position, which contains:
● A TN2312AP/BP IPSI circuit pack for IP connection to control network.

● A TN2602AP IP Media Resource 320 for PN bearer connections over the LAN

NOTE: The TN2602AP circuit pack may be placed in any gateway in the PN. However, the pair of TN2602
circuit packs should be separated between two different gateways whenever possible.
6. IPSI-to-server control network connection via Ethernet switch
7. LAN connection of the TN799DP C-LAN for control of IP endpoints
NOTE: The number of TN799DP circuit packs varies, depending on the number of IP endpoints, PNs, and adjunct
systems. These circuit packs may be inserted into a port carrier (shown in figure), the PN control carrier, or the
duplicated control carrier.
8. LAN connections of TN2602AP IP Media Resource 320 circuit packs for IP-TDM voice processing
9. Customer LAN
10. LAN connections of media servers for remote administration
11. Duplicated server links, including the link for translations transfer and the link for control data sharing
2 of 2

S8700-series direct-connect (single control network)

In this configuration, one PN is connected to the server over an Ethernet connection. Fiber links
connect up to two additional PNs to each other. This configuration also requires either a
dual-NIC card in the S8700-series Media Server or an interim Ethernet switch.

IPSI-connected PN
Only the G650 media gateway is available for new installations. However, because different
migrations from older systems are supported, the PN connected to the S8700-series Media
Server can consist of one of three gateways:
● G650 media gateway
A G650 PN can consist of one to five G650 gateways in a stack connected by a TDM/LAN
bus cable. One gateway, serving as control gateway in position A at the bottom of the stack,
contains the following:
- TN2312BP IPSI circuit pack

42 Administration for Network Connectivity for Avaya Communication Manager

 Port network configurations with S8500 and S8700-series Media Servers

● SCC1 media gateway

An SCC1 PN can consist of one to four SCC1 gateways in a stack connected by a TDM/
LAN bus cable. One gateway, serving as control gateway in position A at the bottom of the
stack, contains the following:
- TN2312AP/BP IPSI circuit pack
Note:
Note: The TN2404 and TN2401 processor circuit packs, needed for the SI model, are
not used and must be removed if the SCC1 is being migrated from a DEFINITY
server.
● MCC1 media gateway
An MCC1 PN has from one to five carriers in an MCC1 gateway connected by a TDM/LAN
bus cables. One carrier, serving as control carrier in position A in the middle of the stack,
contains the following:
- TN2312AP/BP IPSI circuit pack
Note:
Note: The control carrier for a DEFINTY Server SI or R is not used and must be
removed and replaced with an expansion control carrier if the MCC1 is being
migrated. The processor circuit packs, needed for the SI or R models, are not
used and must be removed. Other PNs can also be MCC1 Gateways.

PNs not IPSI-connected

In a S8700-series Media Server direct connect configuration, additional PNs (up to two only)
may be connected to the IPSI-connected PN using fiber optic cable between external interface
(EI) TN570B (version 7 or later) circuit packs. The cables are connected to the circuit packs
using short-range or long-range multi-mode transceivers, or single-mode transceivers,
depending on the distance between PNs.
The TN570B circuit packs reside in the control carrier (MCC1) or control gateway (G650 or
SCC1) of each PN. The control carrier or gateway in each additional PN also must contain a
TN2182 Tone Clock circuit pack (SCC1 or MCC1) or a maintenance-only TN2312ABP IPSI
circuit pack (G650).
Note:
Note: Straight fiber connections between TN570B circuit packs may be up to 200 feet
(61 meters) (see TN570B Expansion Interface PN connections up to 200 ft. on
page 75). If the distance between PNs is greater, Light guide interface units
(LIUs) must also be used to connect the fiber cables or the connection must use
TN1654 DS1 converters. Lengths of fiber, including connections through LIUs or
DS1 converters, are:
- 4900 feet (1493.5 meters) (see TN570B Expansion Interface PN connections up to
4900/25000 ft. and 22 miles. on page 76)

Issue 12 February 2007 43

Networking overview

- 25,000 feet (7620 meters) in multimode (see TN570B Expansion Interface PN

connections up to 4900/25000 ft. and 22 miles. on page 76)
- 21.7 miles (34.9 kilometers) in single mode (see TN570B Expansion Interface PN
connections up to 4900/25000 ft. and 22 miles. on page 76)
- 200 miles (322 kilometers) (see TN1654 DS1 Converter/TN570B Expansion
Interface PN connections up to 200 miles. on page 78)
Note:
Note: You cannot connect additional PNs that contain CMC1 or G600 Media Gateways.

TN2602AP circuit packs for duplicated bearer

For an S8700-series Media Server, any individual fiber-PNC PN can contain load-balancing or
duplicated TN2602AP circuit packs. However, TN2602AP circuit packs do not need to be
implemented uniformly within the system. Thus, some PNs may have no TN2602AP circuit
pack, some PNs may have load-balancing TN2602AP circuit packs, and some PNs may have
duplicated TN2602AP circuit packs. Thus, an S8700-series Media Server can have duplicated
bearer connections, even though it does not support duplicated control or fiber-based
duplicated bearer.

44 Administration for Network Connectivity for Avaya Communication Manager

 Port network configurations with S8500 and S8700-series Media Servers

Figure 8: S8700-series direct-connect single control network

1 1

Duplex ch 1 ch 2

Duplex ch 1 ch 2
disc disc
COMPACT COMPACT

1 1
2 2

UID UID

12

1
5

1
Simplex

Simplex
0

0
4

2
4

0
2
LNK COL Tx

ROUT SYS PWR

Rx FDX Hspd LAG PoE 2 4 6 8 10 12 14 16 18 20 22 24
11
S1 S2 1 3 5 7 9 11 13 15 17 19 21 23

9
3 5

7 10 10 10

4 6
6

8 8
8
cycm3005 LAO 030505

Figure notes: S8700-series direct-connect single control network

1. S8700-series Media Server

2. Ethernet Switch
3. Direct-connect PN (G650 Media Gateway stack [shown in figure],MCC1 Media Gateway, or SCC1 Media Gateway stack
[shown in figure], consisting of at least two media gateways or carriers).

4. Media Gateway (G650) or expansion port network (EPN) control gateway (SCC1) or carrier (MCC1), in the A position,
which contains:
● A TN2312AP/BP IPSI circuit pack for IP connection to server.

NOTE: For the G650 Media Gateway, the BP version of the TN2312 is required in order to provide
environmental maintenance.
● Two TN570B EI circuit packs for bearer and control network connections to the other two PNs (if any).

5. PN (G650 Media Gateway or G650 stack [shown in figure], MCC1 Media Gateway, or SCC1 Media Gateway or SCC1
stack).

1 of 2

Issue 12 February 2007 45

Networking overview

Figure notes: S8700-series direct-connect single control network (continued)

6. PN control gateway or carrier, in the A position, which contains two TN570B EI circuit packs for bearer and control network
connections to the other two PNs.
NOTE: One TN2182 Tone Clock circuit pack must also be present per PN if the PN(s) consist of SCC1 or MCC1
Media Gateways. One maintenance-only TN2312AP/BP IPSI circuit pack must be present per PN if the PN(s)
consist of G650 Media Gateways.
7. IPSI-to-server control network connection via Ethernet switch

8. TN 570/570 fiber connections between PNs

9. Customer LAN

10. LAN connections, if any, of optional TN2302AP IP Media Interface or TN2602AP IP Media Resource 320 for IP-TDM voice
processing and optional TN799DP C-LAN for control of IP endpoints
NOTE: The number of TN2302AP, TN2602AP, and TN799DP circuit packs varies, depending on the number of IP
endpoints, PNs, and adjunct systems. These circuit packs are optional for PNs in a direct-connect network and may
be inserted into a port carrier (shown in figure) or the PN control carrier. However, the C-LAN circuit pack is required
for downloads of firmware updates.
11. LAN connections of media servers for remote administration

12. Duplicated server links, including the link for translations transfer and the link for control data sharing. The link for control
data sharing is implemented through the DAL2 board or (for the S8720 media server) through software duplication.

2 of 2

S8700-series direct-connect (duplicated control network)

For high reliability in a direct-connect configuration, the control network is duplicated. This
configuration is basically the same as that of the single control network configuration, except
that a second carrier or gateway is added in the B position to provide a second IPSI connection
to the servers. In this case, the normally-active server is connected to the control carrier/
gateway IPSI circuit pack, and the standby server is connected to the second carrier/gateway
IPSI circuit pack. See S8700-series direct-connect duplicated control network on page 47.
All other connections between the PNs are the same.

46 Administration for Network Connectivity for Avaya Communication Manager

 Port network configurations with S8500 and S8700-series Media Servers

Figure 9: S8700-series direct-connect duplicated control network

1 1

Duplex ch 1 ch 2

Duplex ch 1 ch 2
disc disc
COMPACT COMPACT

1 1
2 2

UID UID

13

1
5

1
Simplex

Simplex
0

0
4

2
4

0
12
2 2
LNK COL Tx Rx FDX Hspd LAG PoE 2 4 6 8 10 12 14 16 18 20 22 24 LNK COL Tx Rx FDX Hspd LAG PoE 2 4 6 8 10 12 14 16 18 20 22 24

ROUT SYS PWR ROUT SYS PWR

S1 S2 1 3 5 7 9 11 13 15 17 19 21 23 S1 S2 1 3 5 7 9 11 13 15 17 19 21 23

10

8
3 6

8 11 11 11

4 7
7

9 9
9
cycm3006 LAO 030505

Figure notes: S8700-series direct-connect duplicated control network

1. S8700-series Media Server

2. Ethernet Switch

3. Direct-connect PN (G650 Media Gateway stack [shown in figure], MCC1 Media Gateway, or SCC1 Media Gateway stack),
consisting of at least two media gateways or carriers.

4. PN control gateway or carrier, in the A position, which contains:

● A TN2312AP/BP IPSI circuit pack for IP connection to server.

NOTE: For the G650 Media Gateway, the BP version of the TN2312 is required in order to provide
environmental maintenance.
● Two TN570B EI circuit packs for bearer and control network connections to the other two PNs (if any).

1 of 2

Issue 12 February 2007 47

Networking overview

Figure notes: S8700-series direct-connect duplicated control network (continued)

5. Duplicated expansion control gateway or carrier, in the B position, which contains:
● A TN2312AP/BP IPSI circuit pack for IP connection to control network

6. PN (G650 Media Gateway stack [shown in figure], MCC1 Media Gateway, SCC1 Media Gateway stack [shown in figure]),
consisting of at least two media gateways or carriers.

7. PN control gateway or carrier, which contains two TN570B EI circuit packs for bearer and control network connections to
the other two PNs.
NOTE: One TN2182 Tone Clock circuit pack must also be present per PN if the PN(s) consist of SCC1 or MCC1
Media Gateways. One maintenance-only TN2312BP IPSI circuit pack must be present per PN if the PN(s) consist of
G650 Media Gateways.
The control gateway or carrier is always in the A position in the MCC1 or gateway stack.

8. IPSI-to-server control network connection via Ethernet switch

9. TN 570/570 fiber connections between PNs

10. Customer LAN

11. LAN connections, if any, of optional TN2302AP IP Media Interface or TN2602AP IP Media Resource 320 for IP-TDM voice
processing and optional TN799DP C-LAN for control of IP endpoints
NOTE: The number of TN2302AP, TN2602AP, and TN799DP circuit packs varies, depending on the number of IP
endpoints, PNs, and adjunct systems. These circuit packs are optional for PNs in a direct-connect network and may
be inserted into a port carrier (shown in figure), the PN control carrier, or the duplicated control carrier. However, the
C-LAN circuit pack is required for downloads of firmware updates.

12. LAN connections of media servers for remote administration

13. Duplicated server links, including the link for translations transfer and the link for control data sharing. The link for control
data sharing is implemented through the DAL2 board or (for the S8720 media server) through software duplication.

2 of 2

S8700-series direct-connect (duplicated control and bearer

networks)
For critical reliability in a direct-connect configuration, both the control network and bearer
network are duplicated. This configuration is basically the same as the duplicated-control-
network-only (high reliability) configuration, except that a second carrier or gateway is added in
each additional PN with optic fiber link connections to the second carrier or gateway of the
IPSI-connect PN. See S8700-series direct-connect duplicated control network and duplicated
voice-bearer network on page 49.
All other connections between the PNs are the same as those of the
duplicated-control-network-only configuration.

48 Administration for Network Connectivity for Avaya Communication Manager

 Port network configurations with S8500 and S8700-series Media Servers

Figure 10: S8700-series direct-connect duplicated control network and duplicated

voice-bearer network

1 1

Duplex ch 1 ch 2

Duplex ch 1 ch 2
disc disc
COMPACT COMPACT

1 1
2 2

UID UID

1
5

1
15

Simplex

Simplex
0

0
4

2
4

0
2 2
LNK COL Tx

ROUT SYS PWR

Rx FDX Hspd LAG PoE 2 4 6 8 10 12 14 16 18 20 22 24 LNK COL Tx

ROUT SYS PWR

Rx FDX Hspd LAG PoE 2 4 6 8 10 12 14 16 18 20 22 24
14
S1 S2 1 3 5 7 9 11 13 15 17 19 21 23 S1 S2 1 3 5 7 9 11 13 15 17 19 21 23

9 9
13

12

3 6 6
13 13

5 8 11 8
11

4 7 7

10 10

11 cycm3007 LAO 030505

Figure notes: S8700-series direct-connect duplicated control network and duplicated

voice-bearer network
1. S8700-series Media Server

2. Ethernet Switch

3. Direct-connect PN (G650 Media Gateway stack [shown in figure],MCC1 Media Gateway, or SCC1 Media Gateway stack,
consisting of at least two media gateways or carriers).

1 of 2

Issue 12 February 2007 49

Networking overview

Figure notes: S8700-series direct-connect duplicated control network and duplicated

voice-bearer network (continued)
4. PN control gateway or carrier, in the A position, which contains:
● A TN2312AP/BP IPSI circuit pack for IP connection to server.

NOTE: For the G650 Media Gateway, the BP version of the TN2312 is required in order to provide
environmental maintenance.
● Two TN570B EI circuit packs for bearer and control network connections to the other two PNs (if any).

5. Duplicated expansion control cabinet or carrier, in the B position, which contains:

● A TN2312AP/BP IPSI circuit pack for IP connection to control network.

● Two TN570B EI circuit packs for bearer and control network connections to the other two PNs.

6. PN (G650 Media Gateway stack (shown in figure), MCC1 Media Gateway, SCC1 Media Gateway stack), consisting of at
least two media gateways or carriers.

7. PN control gateway or carrier, in the A position, which contains two TN570B EI circuit packs for bearer and control network
connections to the other two PNs.
NOTE: One TN2182 Tone Clock circuit pack must also be present per PN if the PN(s) consist of SCC1 or MCC1
Media Gateways. One maintenance-only TN2312AP/BP IPSI circuit pack must be present per PN if the PN(s)
consist of G650 Media Gateways.

8. Duplicated expansion control cabinet or carrier, in the B position, which contains:

● Two TN570B EI circuit packs for bearer and control network connections to the other two PNs.

9. IPSI-to-server control network connection via Ethernet switch

10. TN 570/570 fiber connections between PNs

11. Duplicated TN 570/570 fiber connections between PNs

12. Customer LAN

13. LAN connections, if any, of optional TN2302AP IP Media Interface or TN2602AP IP Media Resource 320 for IP-TDM voice
processing and optional TN799DP C-LAN for control of IP endpoints
NOTE: The number of TN2302AP, TN2602AP, and TN799DP circuit packs varies, depending on the number of
IP endpoints, PNs, and adjunct systems. These circuit packs are optional for PNs in a direct-connect network
and may be inserted into a port carrier (shown in figure), the PN control carrier, or the duplicated control carrier.
However, the C-LAN circuit pack is required for downloads of firmware updates.

14. LAN connections of media servers for remote administration

15. Duplicated server links, including the link for translations transfer and the link for control data sharing. The link for control
data sharing is implemented through the DAL2 board or (for the S8720 media server) through software duplication.

2 of 2

Rules for TN570B circuit pack placement with SCC1/MCC1

Media Gateways
Fiber-PNC MCC1 and SCC1 Media Gateways have the following rules on the placement of
TN570B External Interface circuit packs in direct connect configurations.

50 Administration for Network Connectivity for Avaya Communication Manager

 Port network configurations with S8500 and S8700-series Media Servers

With a single and duplicated control network

For a direct connect configuration with a single (standard reliability) or duplicated control (high
reliability) network, the placement rules are as follows:
● The IPSI-connected PN houses up to two TN570B circuit packs, the first in the A01 slot
and the second in the A02 slot. These circuit packs connect to the TN570B circuit packs
residing in the A01 slots only of the non-IPSI-connected PNs (up to two).
● With three PNs in the direct connect configuration, the non-IPSI-connected PNs connect
over fiber to each other with a TN570B circuit pack that resides in the A02 slot in each PN.

With duplicated bearer network

For a direct connect configuration with duplicated control and a duplicated bearer (critical
reliability) network, the rules for a single/duplicated control network still apply. In addition, the
following rules apply for the TN570B circuit packs in the B cabinets/carriers:
● The IPSI-connected PN houses up to two TN570B circuit packs in the duplicated control
cabinet/carrier, the first in the B02 slot and the second in the B03 slot. These circuit packs
connect to the TN570B circuit packs residing in the B02 slots only of the
non-IPSI-connected PNs (up to two).
● With three PNs in the direct connect configuration, the non-IPSI-connected PNs connect
over fiber to each other with a TN570B circuit pack that resides in the B03 slot in each PN.
The following table illustrates the exact TN570B-to-TN570B connections and the required
placement of the TN570B circuit packs in the PNs.

Table 1: Slot positions of connected TN570B circuit packs in SCC1/MCC1 direct connect
configurations (single and duplicated control networks)

With PN1 IPSI-connected With PN2 IPSI-connected With PN3 IPSI-connected

1A01 connects to 2A01 2A01 connects to 1A01 3A01 connects to 1A01

Single control
(A position)

1A02 connects to 3A01 2A02 connects to 3A01 3A02 connects to 2A01

connected TN570Bs1

2A02 connects to 3A02 1A02 connects to 3A02 1A02 connects to 2A02

Slot Positions of

1B02 connects to 2B02 2B02 connects to 1B02 3B02 connects to 1B02

Duplicated control

1B02 connects to 3B02 2B03 connects to 3B02 3B03 connects to 2B02

(B position)

2B03 connects to 3B03 1B03 connects to 3B03 1B03 connects to 2B03

1. Slot positions are in the form UUCCSS, where UU is the port network number, CC is the cabinet or carrier, and SS is
the slot number.

Issue 12 February 2007 51

Networking overview

Implications for migrations from DEFINITY R and SI Servers - In a migration from a

DEFINITY Server R or SI to an S8700-series Media Server with a single or duplicated control
network, one of the port networks in the new configuration must have either one or two IPSIs
installed in the PN for connections to the server. It is recommended that the IPSI be installed in
the converted processor port network (PPN) of the DEFINITY system because the TN570B
fiber connections can remain as they were prior to the migration. If the IPSI is installed in a
converted EPN instead, the fiber connections between the TN570Bs must be changed. Table 1
illustrates the necessary changes, assuming that PN1 represents the converted PPN.
Likewise, if the migrated configuration includes a duplicated bearer network, the
recommendation to install the IPSIs in the converted PPN becomes even more compelling, If
the PPN does not become the IPSI-connected PN, then changes to fiber connections between
the TN570Bs are necessary in both the A and B positions.
Note:
Note: The G650 Media Gateway does not restrict where the TN570B EI circuit packs
are placed, except that they cannot be inserted into the A01 and B01 slots.

S8700-series Center Stage Switch (single control network)

The Center Stage Switch (CSS) is an MCC1 Media Gateway that contains a switch node carrier
(SNC) in the bottom E position. The SNC, in turn, houses TN573B switch node interface (SNI)
circuit packs, which connect to PNs over optic fiber cable to TN570B EI circuit packs in the PNs.
A single SNC allows 15 PNs to be connected with fiber to the IPSI-connected PN. In large
configurations, a second or third MCC1 may be equipped with an SNC. The SNC expansion of
port networks, therefore, is as follows:
● One SN can expand to up to 15 PNs.
● Two SNs can expand to up to 29 PNs.
● Three SNs can expand to up to 44 PNs.
Note:
Note: The fiber link connections in an S8700-series CSS configuration follow the same
distance rules as those of the S8700-series direct-connect configurations.
A single IPSI circuit pack allows the server to control up to 5 PNs only. Therefore, in a
configuration with many PNs, multiple PNs may be IPSI-connected.

52 Administration for Network Connectivity for Avaya Communication Manager

 Port network configurations with S8500 and S8700-series Media Servers

PN configurations
The MCC1 Media Gateway with a CSS is a IPSI-connected PN that also houses an SNC.
However, the MCC1 as a CSS can also be configured to house only the SNC, with no control or
port carriers. In this case, the MCC1 connects to a IPSI-connected PN using the
SNI-to-TN570B fiber connection. Therefore, in a CSS configuration, the PNs can be any of the
following:
● MCC1 Media Gateway
IPSI-connected. An MCC1 PN that is connected to the server has the same configuration
as that of a IPSI-connected PN in a direct-connect with duplex-servers-only configuration.
However, if the MCC1 PN also contains an SNC, the IPSI-connected expansion control
carrier of the MCC1 must also be connected to the SNC with optic fiber from a TN570B
circuit pack. Also, only 4 carriers are then available for control and port circuit packs.
Non-IPSI-connected. An MCC1 PN that is not connected directly to the server has the
same configuration as that of an additional MCC1 PN in a direct-connect with single control
network configuration.
● G650 media gateway
IPSI-connected. A G650 PN can consist of one or more G650 gateways in a stack (up to 5
in a stack connected by TDM/LAN bus cables). A G650 PN that is connected to the server
has the same configuration as that of a IPSI-connected PN in a direct-connect with single
control network configuration.
Not IPSI-connected. A G650 PN that is not connected directly to the server but is
connected to the SNC has the same configuration as that of an additional G650 PN in a
direct-connect with single control network configuration.
● SCC1 media gateway
IPSI-connected. An SCC1 PN can consist of one or more SCC1 gateways in a stack (up to
4 in stack connected by TDM/LAN bus cables). An SCC1 PN that is connected to the server
has the same configuration as that of a IPSI-connected PN in a direct-connect with single
control network configuration.
Not IPSI-connected. An SCC1 PN that is not connected directly to the server but is
connected to the SNC has the same configuration as that of an additional SCC1 PN in a
direct-connect with single control network configuration.
Note:
Note: With the S8700-series Media Server, the SNC is not connected to the other
carriers in the MCC1 cabinet with TDM/LAN bus cables.
In the following example, 5 PNs, one of which is embedded in the MCC1 with the CSS, requires
two IPSIs.

Issue 12 February 2007 53

Networking overview

TN2602AP circuit packs for duplicated bearer

For an S8700-series Media Server, any individual fiber-PNC PN can contain load-balancing or
duplicated TN2602AP circuit packs. However, TN2602AP circuit packs do not need to be
implemented uniformly within the system. Thus, some PNs may have no TN2602AP circuit
pack, some PNs may have load-balancing TN2602AP circuit packs, and some PNs may have
duplicated TN2602AP circuit packs. Thus, an S8700-series Media Server can have duplicated
bearer connections, even though it does not support duplicated control or fiber-based
duplicated bearer.

54 Administration for Network Connectivity for Avaya Communication Manager

 Port network configurations with S8500 and S8700-series Media Servers

Figure 11: S8700-series Center Stage Switch single control network

1 1

Duplex ch 1 ch 2

Duplex ch 1 ch 2
disc disc
COMPACT COMPACT

1 1
2 2

UID UID

16

1
5

1
Simplex

Simplex
0

0
4

2
15

0
2
LNK COL Tx Rx FDX Hspd LAG PoE 2 4 6 8 10 12 14 16 18 20 22 24

ROUT SYS PWR

S1 S2 1 3 5 7 9 11 13 15 17 19 21 23

13
7
14
3
6

14
4

12

14 5

8
11

9 9

11 11 11

10 10
10

cycm3008 LAO 030505

Issue 12 February 2007 55

Networking overview

Figure notes: S8700-series Center Stage Switch single control network

1. S8700-series Media Server

2. Ethernet Switch

3. MCC1 Media Gateway (CSS and PN)

4. PN control carrier, in the A position, which contains:

● A TN2312AP/BP IPSI circuit pack for IP connection to server.

● A TN570B EI circuit pack for bearer and control network connections to the Switch Node Carrier (SNC).

5. SNC, in the E position, which contains:

● Multiple TN573B SNI circuit packs for EI connections to PNs

6. IPSI-to-server control network connection via Ethernet switch

7. IPSI-connected PN (G650 Media Gateway or stack [shown in figure],MCC1 Media Gateway, or SCC1 Media Gateway
stack).

8. PN control gateway or carrier, in the A position, which contains:

● A TN2312AP/BP IPSI circuit pack for IP connection to server.

NOTE: For the G650 Media Gateway, the BP version of the TN2312 is required in order to provide
environmental maintenance.
● A TN570B EI circuit pack for bearer and control network connections to the SNI.

9. PN (MCC1 Media Gateway, SCC1 Media Gateway stack [shown in figure], or G650 Media Gateway stack [shown in figure])
consisting of one or more media gateways or carriers.
10. PN control gateway or carrier, in the A position, which contains:
● A TN570B EI circuit pack for bearer and control network connections to the SNI.

NOTE: One TN2182 Tone Clock circuit pack must also be present per PN if the PN(s) consist of SCC1 or MCC1
Media Gateways. One maintenance-only TN2312BP IPSI circuit pack must be present per PN if the PN(s) consist of
G650 Media Gateways.

11. TN 570B/573B fiber connections between PNs and SNC

12. TN 573B/570B fiber connections between the SNC and the MCC1’s A carrier (if the MCC1 is a PN)

13. Customer LAN

14. LAN connections, if any, of optional TN2302AP IP Media Interface or TN2602AP IP Media Resource 320 for IP-TDM voice
processing and optional TN799DP C-LAN for control of IP endpoints
NOTE: The number of TN2302AP, TN2602AP, and TN799DP circuit packs varies, depending on the number of IP
endpoints, PNs, and adjunct systems. These circuit packs are optional for PNs in a CSS-connected network and
may be inserted into a port carrier (shown in figure), the PN control carrier, or the duplicated control carrier.
However, the C-LAN circuit pack is required for downloads of firmware updates.

15. LAN connections of media servers for remote administration

16. Duplicated server links, including the link for translations transfer and the link for control data sharing. The link for control
data sharing is implemented through the DAL2 board or (for the S8720 media server) through software duplication.

56 Administration for Network Connectivity for Avaya Communication Manager

 Port network configurations with S8500 and S8700-series Media Servers

S8700-series Center Stage Switch (duplicated control network)

For high reliability in a CSS configuration, the control network is duplicated. This configuration is
basically the same as that of the single control network configuration, except that a second
carrier or gateway is added in the B position of each IPSI-connected PN to provide a second
IPSI connection to the servers. In addition, this configuration contains duplicated Ethernet
switches, each connected to both S8700-series Media Servers.
Note:
Note: With the S8700-series Media Server, the SNC is not connected to the other
carriers in the MCC1 cabinet with TDM/LAN bus cables.

IPSI-connected PNs
Because a single IPSI circuit pack allows the server to control up to 5 PNs only. a configuration
with many PNs and duplicated control networks can require many IPSI circuit packs.

TN2602AP circuit packs for duplicated bearer

For an S8700-series Media Server, any individual fiber-PNC PN can contain load-balancing or
duplicated TN2602AP circuit packs. However, TN2602AP circuit packs do not need to be
implemented uniformly within the system. Thus, some PNs may have no TN2602AP circuit
pack, some PNs may have load-balancing TN2602AP circuit packs, and some PNs may have
duplicated TN2602AP circuit packs. Thus, an S8700-series Media Server can have duplicated
bearer connections, even though it does not support duplicated control or fiber-based
duplicated bearer.

Issue 12 February 2007 57

Networking overview

Figure 12: S8700-series Center Stage Switch duplicated control networks

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ROUT SYS PWR ROUT SYS PWR

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58 Administration for Network Connectivity for Avaya Communication Manager

 Port network configurations with S8500 and S8700-series Media Servers

Figure notes: S8700-series Center Stage Switch duplicated control networks

1. S8700-series Media Server

2. Ethernet Switch

3. MCC1 Media Gateway (CSS and PN)

4. PN control carrier, in the A position, which contains:

● A TN2312AP/BP IPSI circuit pack for IP connection to server.

● A TN570B EI circuit pack for bearer and control network connections to the Switch Node Carrier (SNC).

5. Duplicated control carrier, in the B position, which contains:

● A TN2312AP/BP IPSI circuit pack for IP connection to duplicated control network.

6. SNC, in the E position, which contains:

● Multiple TN573B SNI circuit packs for EI connections to PNs

7. Dedicated IPSI-to-server control network connection via Ethernet switch

8. IPSI-connected PN (G650 Media Gateway stack [shown in figure],MCC1 Media Gateway, or SCC1 Media Gateway stack,
consisting of at least two media gateways or carriers).

9. PN control gateway or carrier, in the A position, which contains:

● A TN2312AP/BP IPSI circuit pack for IP connection to server.

NOTE: For the G650 Media Gateway, the BP version of the TN2312 is required in order to provide
environmental maintenance.
● A TN570B EI circuit pack for bearer and control network connections to the SNC.

10. Duplicated control gateway, in the B position, which contains:

● A TN2312AP/BP IPSI circuit pack for IP connection to server.

11. Fiber-PNC PN (G650 Media Gateway stack [shown in figure], MCC1 Media Gateway, SCC1 Media Gateway stack [shown
in figure]), consisting of at least two media gateways or carriers.

12. PN control gateway or carrier, in the A position which contains:

● A TN570B EI circuit pack for bearer and control network connections to the SNI.

NOTE: One TN2182 Tone Clock circuit pack must also be present per PN if the PN(s) consist of SCC1 or MCC1
Media Gateways. One maintenance-only TN2312BP IPSI circuit pack must be present per PN if the PN(s) consist of
G650 Media Gateways.

13. TN 570B/573B fiber connections between PNs and SNC

14. TN 573B/570B fiber connections between the SNC and the MCC1’s A carrier (if the MCC1 is a PN)
15. Customer LAN

16. LAN connections, if any, of optional TN2302AP IP Media Interface or TN2602AP IP Media Resource 320 for IP-TDM voice
processing and optional TN799DP C-LAN for control of IP endpoints
NOTE: The number of TN2302AP, TN2602AP, and TN799DP circuit packs varies, depending on the number of IP
endpoints, PNs, and adjunct systems. These circuit packs are optional for PNs in a CSS-connected network and
may be inserted into a port carrier (shown in figure), the PN control carrier, or the duplicated control carrier.
However, the C-LAN circuit pack is required for downloads of firmware updates.

17. LAN connections of media servers for remote administration

18. Duplicated server links, including the link for translations transfer and the link for control data sharing. The link for control
data sharing is implemented through the DAL2 board or (for the S8720 media server) through software duplication.

Issue 12 February 2007 59

Networking overview

S8700-series Center Stage Switch (duplicated control and bearer

networks)
Like the high reliability CSS configuration, the critical reliability CSS configuration duplicates the
control network between the servers and the PNs. In addition, this configuration contains
duplicated switch node carriers in each CSS, which duplicates the bearer network between
PNs. Each PN, in turn, contains duplicated TN570B external interface circuit packs that connect
to both switch node carriers. In addition, each non-IPSI-connected PN must have duplicate
TN2182CTone Clock circuit packs. And finally, in each location of a PN or group of PNs, one of
the PNs must have a TN771 Maintenance Test circuit pack.
Note:
Note: With the S8700-series Media Server, the SNCs are not connected to the other
carriers in the MCC1 cabinet with TDM/LAN bus cables.

TN2602AP circuit packs for duplicated bearer

For an S8700-series Media Server, any individual fiber-PNC PN can contain load-balancing or
duplicated TN2602AP circuit packs. However, TN2602AP circuit packs do not need to be
implemented uniformly within the system. Thus, some PNs may have no TN2602AP circuit
pack, some PNs may have load-balancing TN2602AP circuit packs, and some PNs may have
duplicated TN2602AP circuit packs. Thus, an S8700-series Media Server can have duplicated
bearer connections, even though it does not support duplicated control or fiber-based
duplicated bearer.

60 Administration for Network Connectivity for Avaya Communication Manager

 Port network configurations with S8500 and S8700-series Media Servers

Figure 13: S8700-series Center Stage Switch duplicated control and duplicated
voice-bearer networks

1 1

Duplex ch 1 ch 2

Duplex ch 1 ch 2
disc disc
COMPACT COMPACT

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ROUT SYS PWR ROUT SYS PWR

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Issue 12 February 2007 61

Networking overview

Figure notes: S8700-series Center Stage Switch duplicated control and duplicated
voice-bearer networks
1. S8700-series Media Server

2. Ethernet Switch

3. IPSI-connected PN (MCC1 Media Gateway, consisting of at least two carriers).

4. Expansion port network (EPN) control carrier, in the A position, which contains:
● A TN2312AP/BP IPSI circuit pack for IP connection to server.

● A TN570B EI circuit pack for bearer and control network connections to the Switch Node Carrier (SNC).

5. Duplicated control carrier, in the B position, which contains:

● A TN2312AP/BP IPSI circuit pack for IP connection to duplicated control network.

● A TN570B circuit pack for bearer and control network connections to the SNC.

NOTE: For the duplicated control and bearer network configurations, each location of a PN or a group of PNs
must contain a TN771 Maintenance Test circuit pack.
6. SNC, in the E position, which contains:
● Multiple TN573B SNI circuit packs for EI connections to PNs

7. Duplicated SNC, in the D position, which duplicates the EI connections of the primary SNC.

8. Dedicated IPSI-to-server control network connection via Ethernet switch

9. IPSI-connected PN (G650 Media Gateway stack [shown in figure],MCC1 Media Gateway, or SCC1 Media Gateway stack),
consisting of at least two media gateways or carriers).

10. PN control gateway or carrier, in the A position, which contains:

● A TN2312AP/BP IPSI circuit pack for IP connection to server.

NOTE: For the G650 Media Gateway, the BP version of the TN2312 is required in order to provide
environmental maintenance.
● A TN570B EI circuit pack for bearer and control network connections to the SNC.

11. Duplicated control gateway, in the B position, which contains:

● A TN2312AP/BP IPSI circuit pack for IP connection to server.

● A TN570B EI circuit pack for bearer and control network connections to the SNI.

12. Fiber-PNC PN (G650 Media Gateway stack [shown in figure], MCC1 Media Gateway, SCC1 Media Gateway stack [shown
in figure]), consisting of at least two media gateways or carriers.

13. PN control gateway or carrier, in the A position, which contains:

● A TN570B EI circuit pack for bearer and control network connections to the SNI.

● One TN2182 Tone Clock circuit pack if the PN consists of SCC1 or MCC1 Media Gateways, or one
maintenance-only TN2312AP/BP IPSI circuit pack if the PN(s) consist of G650 Media Gateways

14. Duplicated control gateway, in the B position, which contains:

● A TN570B EI circuit pack for bearer and control network connections to the SNI.

● One TN2182 Tone Clock circuit pack if the PN consists of SCC1 or MCC1 Media Gateways, or one
maintenance-only TN2312AP/BP IPSI circuit pack if the PN(s) consist of G650 Media Gateways

15. TN 570B/573B fiber connections between PNs and SNCs

16. TN 573B/570B fiber connections between the SNCs and the MCC1’s A and B carriers (if the MCC1 is a PN)
17. Customer LAN

1 of 2

62 Administration for Network Connectivity for Avaya Communication Manager

 Port network configurations with S8500 and S8700-series Media Servers

Figure notes: S8700-series Center Stage Switch duplicated control and duplicated
voice-bearer networks (continued)
18. LAN connections, if any, of optional TN2302AP IP Media Interface or TN2602AP IP Media Resource 320 for IP-TDM voice
processing and optional TN799DP C-LAN for control of IP endpoints
NOTE: The number of TN2302AP, TN2602AP, and TN799DP circuit packs varies, depending on the number of IP
endpoints, PNs, and adjunct systems. These circuit packs are optional for PNs in a CSS-connected network and
may be inserted into a port carrier (shown in figure), the PN control carrier, or the duplicated control carrier.
However, the C-LAN circuit pack is required for downloads of firmware updates.

19. LAN connections of media servers for remote administration

20. Duplicated server links, including the link for translations transfer and the link for control data sharing. The link for control
data sharing is implemented through the DAL2 board or (for the S8720 media server) through software duplication.

2 of 2

S8700-series ATM Switch (single control network)

An S8700-series Media Server can support up to 64 PNs by using Asynchronous Transmission
Mode (ATM) switching for PN connections. Each PN in the configuration must have a TN2305B
ATM interface circuit pack (for multimode fiber) or a TN2306B ATM interface circuit pack (for
single-mode fiber) in order to connect to every other PN in the system. The PNs can be MCC1,
SCC1, or G650 Media Gateways (or gateway stacks). At least one PN is IPSI-connected to the
S8700-series Media Servers. The ATM switch connects to the fiber with an OC-3 interface.
Note:
Note: The ATM configuration illustrations show multi-mode fiber connections using
TN2305B ATM-CES circuit packs and multi-mode fiber. With single-mode fiber
connections, the configurations are the same, but the ATM connections uses
TN2306B ATM-CES circuit packs and single-mode fiber.
A single IPSI circuit pack allows the server to control up to 5 PNs only. Therefore, in a
configuration with many PNs, multiple PNs may be IPSI-connected.

TN2602AP circuit packs for duplicated bearer

For an S8700-series Media Server, any individual fiber-PNC PN can contain load-balancing or
duplicated TN2602AP circuit packs. However, TN2602AP circuit packs do not need to be
implemented uniformly within the system. Thus, some PNs may have no TN2602AP circuit
pack, some PNs may have load-balancing TN2602AP circuit packs, and some PNs may have
duplicated TN2602AP circuit packs. Thus, an S8700-series Media Server can have duplicated
bearer connections, even though it does not support duplicated control or fiber-based
duplicated bearer.

Issue 12 February 2007 63

Networking overview

IPSI-connected PN
Only the G650 media gateway is available for new installations. However, because different
migrations from older systems are supported, the PN connected to the S8700-series Media
Server in an ATM configuration can consist of one of three gateways:
● G650 media gateway
A G650 PN can consist of one to five G650 gateways in a stack connected by a TDM/LAN
bus cable. One gateway, serving as control gateway in position A at the bottom of the stack,
contains the following:
- TN2312BP IPSI circuit pack
- TN2305B or TN2306B ATM-CES circuit pack for bearer and control network connections
to the ATM switch
- TN464GP DS-1 circuit pack for clock synchronization with a network resource
● SCC1 media gateway
An SCC1 PN can consist of one to four SCC1 gateways in a stack connected by a TDM/
LAN bus cable. One gateway, serving as control gateway in position A at the bottom of the
stack, contains the following:
- TN2312AP/BP IPSI circuit pack
- TN2305B or TN2306B ATM-CES circuit pack for bearer and control network connections
to the ATM switch
- TN464GP DS-1 circuit pack for clock synchronization with a network resource
The control gateway or another gateway in the PN also contains a TN464GP DS-1 circuit
pack for clock synchronization with a network resource
Note:
Note: The TN2404 and TN2401 processor circuit packs, needed for the SI model, are
not used and must be removed if the SCC1 is being migrated from a DEFINITY
server.
● MCC1 media gateway
An MCC1 PN has from one to five carriers in an MCC1 gateway connected by a TDM/LAN
bus cables. One carrier, serving as control carrier in position A in the middle of the stack,
contains the following:
- TN2312AP/BP IPSI circuit pack
- TN2305B or TN2306B ATM-CES circuit pack for bearer and control network connections
to the ATM switch
The control carrier or another carrier in the PN also contains a TN464GP DS-1 circuit pack
for clock synchronization with a network resource

64 Administration for Network Connectivity for Avaya Communication Manager

 Port network configurations with S8500 and S8700-series Media Servers

Note:
Note: The control carrier for a DEFINTY Server SI or R is not used and must be
removed and replaced with an expansion control carrier if the MCC1 is being
migrated. The processor circuit packs, needed for the SI or R models, are not
used and must be removed. Other PNs can also be MCC1 Gateways.

PNs not IPSI-connected

In an ATM switch with a single control network configuration, additional PNs (up to 64) may be
connected to the IPSI-connected PN using fiber optic cable between TN2305B/TN2306B
ATM-CES circuit packs and an ATM switch. The cables are connected to the circuit packs using
short-range or long-range multi-mode transceivers, or single-mode transceivers, depending on
the distance between PNs.
The TN2305B/2306B ATM-CES circuit packs reside in the control carrier (MCC1) or control
gateway (G650 or SCC1) of each PN. The control carrier or gateway in each additional PN also
must contain a TN2182 Tone Clock circuit pack (SCC1 or MCC1) or a maintenance-only
TN2312BP IPSI circuit pack (G650).

Issue 12 February 2007 65

Networking overview

Figure 14: S8700-series ATM single control network

1 1

Duplex ch 1 ch 2

Duplex ch 1 ch 2
disc disc
COMPACT COMPACT

1 1
2 2

UID UID

1
20

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Simplex

Simplex
0

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4

2
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LNK COL Tx Rx FDX Hspd LAG PoE 2 4 6 8 10 12 14 16 18 20 22 24

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66 Administration for Network Connectivity for Avaya Communication Manager

 Port network configurations with S8500 and S8700-series Media Servers

Figure notes: S8700-series ATM single control network

1. S8700-series Media Server

2. Ethernet Switch

3. IPSI-connect PN (G650 Media Gateway stack, MCC1 Media Gateway [shown in figure], or SCC1 Media Gateway stack),
consisting of at least two media gateways or carriers.

4. PN control gateway or carrier, in the A position which contains:

● A TN2312AP/BP IPSI circuit pack for IP connection to server.

NOTE: For the G650 Media Gateway, the BP version of the TN2312 is required in order to provide
environmental maintenance.
● A TN2305B or T2306B ATM-CES circuit pack for bearer and control network connections to the ATM switch.

5. TN464GP DS-1 circuit pack, for clock synchronization with a network resource

6. ATM switch.
7. IPSI-to-server control network connection via Ethernet switch

8. IPSI-connect PN (G650 Media Gateway stack [shown in figure],MCC1 Media Gateway, or SCC1 Media Gateway stack).

9. PN control gateway or carrier, in the A position which contains:

● A TN2312AP/BP IPSI circuit pack for IP connection to server.

NOTE: For the G650 Media Gateway, the BP version of the TN2312 is required in order to provide
environmental maintenance.
● A TN2305B or T2306B ATM-CES circuit pack for bearer and control network connections to the ATM switch.

10. Fiber-PNC PN (G650 Media Gateway stack [shown in figure], MCC1 Media Gateway, SCC1 Media Gateway stack [shown
in figure])

11. PN control gateway or carrier, in the A position, which contains:

● A TN2305B or T2306B ATM-CES circuit pack for bearer and control network connections to the ATM switch.

NOTE: One TN2182 Tone Clock circuit pack must also be present per PN if the PN(s) consist of SCC1 or MCC1
Media Gateways. One maintenance-only TN2312BP IPSI circuit pack must be present per PN if the PN(s) consist of
G650 Media Gateways.
12. OC-3 connections to the ATM switch

13. 401A/B sync splitter, attached to the back of the TN464GP DS1 circuit pack

14. Public network (PSTN)

15. Timing signal to ATM switch from sync splitter.

16. Fiber connections from TN2305B/TN2306B to ATM switch.

17. Customer LAN

18. LAN connections, if any, of optional TN2302AP IP Media Interface or TN2602AP IP Media Resource 320 for IP-TDM voice
processing and optional TN799DP C-LAN for control of IP endpoints. These circuit packs are optional for PNs in an
ATM-connected network. However, the C-LAN circuit pack is required for downloads of firmware updates.

19. LAN connections of media servers for remote administration

20. Duplicated server links, including the link for translations transfer and the link for control data sharing. The link for control
data sharing is implemented through the DAL2 board or (for the S8720 media server) through software duplication.
21. DS1 connection from sync splitter.

Issue 12 February 2007 67

Networking overview

S8700-series ATM Switch (duplicated control networks)

The high reliability ATM configuration duplicates the control network between the servers and
the PNs. This configuration contains duplicated Ethernet switches, each connected to both
S8700-series Media Servers. Remote IPSI-connected PNs also require duplicated Ethernet
switches. However, IPSI-connected PNs that are collocated with the servers may share
Ethernet switches with the server. The high reliability configuration also includes duplicated
IPSIs in a second carrier or gateway of the IPSI-connected PN. In an ATM high reliability
configuration, the n + 1 formula for IPSIs is not required.

TN2602AP circuit packs for duplicated bearer

For an S8700-series Media Server, any individual fiber-PNC PN can contain load-balancing or
duplicated TN2602AP circuit packs. However, TN2602AP circuit packs do not need to be
implemented uniformly within the system. Thus, some PNs may have no TN2602AP circuit
pack, some PNs may have load-balancing TN2602AP circuit packs, and some PNs may have
duplicated TN2602AP circuit packs. Thus, an S8700-series Media Server can have duplicated
bearer connections, even though it does not support duplicated control or fiber-based
duplicated bearer.

68 Administration for Network Connectivity for Avaya Communication Manager

 Port network configurations with S8500 and S8700-series Media Servers

Figure 15: S8700-series ATM duplicated control networks

1 1

Duplex ch 1 ch 2

Duplex ch 1 ch 2
disc disc
COMPACT COMPACT

1 1
2 2

UID UID

1
23

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Simplex

Simplex
0

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2
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0
21 2 2
LNK COL Tx Rx FDX Hspd LAG PoE 2 4 6 8 10 12 14 16 18 20 22 24 LNK COL Tx Rx FDX Hspd LAG PoE 2 4 6 8 10 12 14 16 18 20 22 24

ROUT SYS PWR ROUT SYS PWR

S1 S2 1 3 5 7 9 11 13 15 17 19 21 23 S1 S2 1 3 5 7 9 11 13 15 17 19 21 23

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Issue 12 February 2007 69

Networking overview

Figure notes: S8700-series ATM duplicated control networks

1. S8700-series Media Server

2. Ethernet Switch

3. IPSI-connected PN (G650 Media Gateway stack, MCC1 Media Gateway [shown in figure], or SCC1 Media Gateway stack),
consisting of at least two media gateways or carriers.

4. PN control gateway or carrier, in the A position, which contains:

● A TN2312AP/BP IPSI circuit pack for IP connection to server.

NOTE: For the G650 Media Gateway, the BP version of the TN2312 is required in order to provide
environmental maintenance.
● A TN2305B or T2306B ATM-CES circuit pack for bearer and control network connections to the ATM switch.

5. Duplicated control carrier, in the B position, which contains:

● A TN2312AP/BP IPSI circuit pack for IP connection to duplicated control network

6. TN464GP DS-1 circuit pack, for clock synchronization with a network resource

7. ATM switch.

8. IPSI-to-server control network connection via Ethernet switch

9. IPSI-connected PN (G650 Media Gateway stack [shown in figure],MCC1 Media Gateway, or SCC1 Media Gateway stack).

10. PN control gateway or carrier, in the A position, which contains:

● A TN2312AP/BP IPSI circuit pack for IP connection to server.

● A TN2305B or T2306B ATM-CES circuit pack for bearer and control network connections to the ATM switch.

11. Duplicated control gateway, in the B position, which contains:

● A TN2312AP/BP IPSI circuit pack for IP connection to server.

12. Fiber-PNC PN (G650 Media Gateway stack [shown in figure], MCC1 Media Gateway, SCC1 Media Gateway stack [shown
in figure]).

13. PN control gateway or carrier, in the A position, which contains:

● A TN2305B or T2306B ATM-CES circuit pack for bearer and control network connections to the ATM switch.

NOTE: One TN2182 Tone Clock circuit pack must also be present per PN if the PN(s) consist of SCC1 or MCC1
Media Gateways. One maintenance-only TN2312BP IPSI circuit pack must be present per PN if the PN(s) consist of
G650 Media Gateways.

14. OC-3 connections to the ATM switch

15. 401A/B sync splitter, attached to the back of the TN464GP DS1 circuit pack

16. Public network (PSTN)

17. Timing signal to ATM switch from sync splitter.

18. Fiber connections from TN2305B/TN2306B to ATM switch.

19. Customer LAN

20. LAN connections, if any, of optional TN2302AP IP Media Interface or TN2602AP IP Media Resource 320 for IP-TDM voice
processing and optional TN799DP C-LAN for control of IP endpoints. These circuit packs are optional for PNs in an
ATM-connected network. However, the C-LAN circuit pack is required for downloads of firmware updates.

21. LAN connections of media servers for remote administration

22. DS1 connection from sync splitter.

23. Duplicated server links, including the link for translations transfer and the link for control data sharing. The link for control
data sharing is implemented through the DAL2 board or (for the S8720 media server) through software duplication.

70 Administration for Network Connectivity for Avaya Communication Manager

 Port network configurations with S8500 and S8700-series Media Servers

S8700-series ATM Switch (duplicated control and bearer

networks)
Like the high reliability ATM configuration, the critical reliability ATM configuration duplicates the
control network between the servers and the PNs. In addition, the critical reliability configuration
contains duplicated ATM switches and ATM connections, with each PN containing duplicated
TN2305B/TN2306B ATM-CES circuit packs with connections to both ATM switches. In addition,
each non-IPSI-connected PN must have duplicate TN2182CTone Clock circuit packs. And
finally, in each location of a PN or group of PNs, one of the PNs must have a TN771
Maintenance Test circuit pack.
As with an ATM high reliability configuration, the n + 1 formula for IPSIs is not required.

TN2602AP circuit packs for duplicated bearer

For an S8700-series Media Server, any individual fiber-PNC PN can contain load-balancing or
duplicated TN2602AP circuit packs. However, TN2602AP circuit packs do not need to be
implemented uniformly within the system. Thus, some PNs may have no TN2602AP circuit
pack, some PNs may have load-balancing TN2602AP circuit packs, and some PNs may have
duplicated TN2602AP circuit packs. Thus, an S8700-series Media Server can have duplicated
bearer connections, even though it does not support duplicated control or fiber-based
duplicated bearer.

Issue 12 February 2007 71

Networking overview

Figure 16: S8700-series ATM duplicated control and duplicated voice-bearer networks

1 1

Duplex ch 1 ch 2

Duplex ch 1 ch 2
disc disc
COMPACT COMPACT

1 1
2 2

UID UID

1
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Simplex
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ROUT SYS PWR ROUT SYS PWR

S1 S2 1 3 5 7 9 11 13 15 17 19 21 23 S1 S2 1 3 5 7 9 11 13 15 17 19 21 23

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72 Administration for Network Connectivity for Avaya Communication Manager

 Port network configurations with S8500 and S8700-series Media Servers

Figure notes: S8700-series ATM duplicated control and duplicated voice-bearer

networks
1. S8700-series Media Server

2. Ethernet Switch

3. IPSI-connect PN (G650 Media Gateway stack, MCC1 Media Gateway [shown in figure], or SCC1 Media Gateway stack),
consisting of at least two media gateways or carriers.

4. PN control gateway or carrier, in the A position, which contains:

● A TN2312AP/BP IPSI circuit pack for IP connection to server.

NOTE: For the G650 Media Gateway, the BP version of the TN2312 is required in order to provide
environmental maintenance.

● A TN2305B or T2306B ATM-CES circuit pack for bearer and control network connections to the ATM switch.

5. Duplicated control carrier or gateway, in the B position, which contains:

● A TN2312AP/BP IPSI circuit pack for IP connection to duplicated control network

● A TN2305B (for multimode fiber) or TN2306B (for single-mode fiber) ATM-CES circuit pack for bearer and control
network connections to the duplicated ATM switch.

NOTE: For the duplicated control and bearer network configurations, each location of a PN or a group of PNs
must contain a TN771 Maintenance Test circuit pack.

6. TN464GP DS-1 circuit pack, for clock synchronization with a network resource
7. ATM switch. There are two ATM switches in this configuration.

8. IPSI-to-server control network connection via Ethernet switch

9. IPSI-connected PN (G650 Media Gateway stack [shown in figure],MCC1 Media Gateway, or SCC1 Media Gateway stack,
consisting of at least two media gateways or carriers).

10. PN control gateway or carrier, in the A position, which contains:

● A TN2312AP/BP IPSI circuit pack for IP connection to server.

● A TN2305B or T2306B ATM-CES circuit pack for bearer and control network connections to the ATM switch.

11. Duplicated control gateway or carrier, in the B position, which contains:

● A TN2312AP/BP IPSI circuit pack for IP connection to server.

● A TN2305B or TN2306B ATM-CES circuit pack for bearer and control network connections to the duplicated ATM
switch.

12. Fiber-PNC PN (G650 Media Gateway stack [shown in figure], MCC1 Media Gateway, SCC1 Media Gateway stack [shown
in figure]), consisting of at least two media gateways or carriers.
13. PN control gateway or carrier, in the A position which contains:
● A TN2305B or T2306B ATM-CES circuit pack for bearer and control network connections to the ATM switch.

● One TN2182 Tone Clock circuit pack if the PN consists of SCC1 or MCC1 Media Gateways. One
maintenance-only TN2312BP IPSI circuit pack if the PN consists of G650 Media Gateways.

14. Duplicated control gateway or carrier, in the B position which contains:

● A TN2305B or T2306B ATM-CES circuit pack for bearer and control network connections to the ATM switch.

● One TN2182 Tone Clock circuit pack if the PN consists of SCC1 or MCC1 Media Gateways. One
maintenance-only TN2312BP IPSI circuit pack if the PN consists of G650 Media Gateways.

15. OC-3 connections to the ATM switch

16. 401A/B sync splitter, attached to the back of the TN464GP DS1 circuit pack

17. Public network (PSTN)

1 of 2

Issue 12 February 2007 73

Networking overview

Figure notes: S8700-series ATM duplicated control and duplicated voice-bearer

networks (continued)
18. Timing signal to ATM switch from sync splitter.

19. Fiber connections from TN2305B/TN2306B to ATM switch.

20. Customer LAN

21. LAN connections, if any, of optional TN2302AP IP Media Interface or TN2602AP IP Media Resource 320 for IP-TDM voice
processing and optional TN799DP C-LAN for control of IP endpoints. These circuit packs are optional for PNs in an
ATM-connected network. However, the C-LAN circuit pack is required for downloads of firmware updates.

22. LAN connections of media servers for remote administration

23. Duplicated server links, including the link for translations transfer and the link for control data sharing. The link for control
data sharing is implemented through the DAL2 board or (for the S8720 media server) through software duplication.

24. DS1 connection from sync splitter.

2 of 2

Distance options with fiber-optic connections

Fiber connections up to 200 feet (61 meters)

EI-to-EI or EI-to-SNI intercabinet connections are implemented by installing a lightwave
transceiver on the I/O connector plate for each of the administered fiber endpoints. Each
lightwave transceiver has a receive and a transmit connector for either a 62.5-micron or
50-micron fiber connection. Standard fibers are available in various lengths up to 150 feet
(46 m) for single-mode fiber and up to 200 feet (61 m) for multimode fiber. These fibers are
used to connect lightwave transceivers to each other when they are close enough together, or
to optical cross-connect facilities for greater distances.
See TN570B Expansion Interface PN connections up to 200 ft. on page 75.

74 Administration for Network Connectivity for Avaya Communication Manager

 Port network configurations with S8500 and S8700-series Media Servers

Figure 17: TN570B Expansion Interface PN connections up to 200 ft.

1 5

3 4 3

2 2
cycm3015 LAO 010105

Figure notes:

1. Local PN
2. TN570B Expansion Interface circuit pack

3. 9823A short range transceiver

4. Multimode fiber cable

Fiber connections up to 22 miles (35.4 kilometers)

The lightwave transceivers are powered from I/O connector plate leads attached to TN570
Expansion Interface circuit pack or a TN573 SNI circuit pack. The transceivers include
loop-around capabilities to support fiber fault isolation. Table 2 lists part number and distance
specifications for the two length-dependent 9823-type multimode transceivers and the 300A
single mode fiber transceiver. The transceivers at each end of the fiber should match.

Table 2: Lightwave transceiver specifications

Lightwave transceiver Maximum fiber length Fiber mode

part number

9823A 4900 feet (1494 m) Multimode

9823B 25,000 feet (7620 m) Multimode
300A 22 miles (35.4 km) Single mode

Issue 12 February 2007 75

Networking overview

Figure 18: TN570B Expansion Interface PN connections up to 4900/25000 ft. and 22 miles.

1 7

4 4
3 5 6 5 3

2 2
cycm3016 KLC 011705

Figure notes:

1. Local PN
2. TN570B Expansion Interface circuit pack

3. 9823A short range transceiver (up to 4900 ft. or 1494 m), 9823B long range transceiver (up to 25000 ft. or 7620 m), or
300A transceiver (22 miles or 35.4 km)

4. Optic fiber

5. Lightguide Interconnect Unit (LIU)

6. Single-mode or multimode fiber cable

Fiber connection up to 200 miles

When fiber-optic cabling is not practical, Digital Service 1 (DS1) can be used to connect PNs up
to 200 miles (322 km) apart. A TN574 or TN1654 DS1 Converter (DS1 CONV) circuit pack
serves as the interface between the network and an EI or SNI on the switch. DS1 cabling on a
carrier consists of a Y-cable that connects a DS1 CONV to an EI or SNI and to the network.

76 Administration for Network Connectivity for Avaya Communication Manager

 Port network configurations with S8500 and S8700-series Media Servers

Table 3 lists the lengths and uses for DS1 CONV cables, depending upon where the DS1
CONV and the EI or SNI are located.

Table 3: DS1 CONV cable specifications

Connection location Length

On same half carrier 1 foot (30.48 cm)

On different half carriers in same cabinet 5.5 feet (1.68 m)
Between two adjacent cabinets 1 foot (30.48 cm), used with two 9823As, and
1 20-foot (6.1 m) fiber-optic cable

The DS1 CONV to EI/SNI cable is a shielded metallic Y-cable held in place at the EI/SNI port
connector by a 4B retainer and at the DS1 CONV port connector by a 4C retainer. The cable
end with one 25-pair amphenol connector attaches to the I/O Plate connector for the EI or SNI.
The end with two 25-pair amphenol connectors attaches to the DS1 CONV I/O plate connector.
The 13-inch (33-centimeter) cable 846448652 or 847245776 connects the DS1 CONV to a
fiber-optic cable, enabling the DS1 CONV to connect to an EI or SNI at a greater distance. The
cable end with one 25-pair amphenol connector attaches to a lightwave transceiver using the
846885259 bracket. The end with two 25-pair amphenol connectors attaches to the DS1 CONV
I/O plate connector. The other end of the fiber-optic cable connects to a lightwave transceiver
attached to the I/O plate connector of the EI or SNI.
An H600-348 cable connects the DS1 CONV cable to a CSU (channel service unit), which
connects to a wall field. Alternatively, connection is sometimes made directly from the Y-cable to
the wall field. This cable provides from one to four DS1 connections. One end of the H600-348
cable is plugged into the 50-pin amphenol piggy-back connector on the 8464486xx cable
connected to the DS1 CONV port connector. The other end of the H600-348 cable has four
15-pin sub-miniature D-type connectors that plug into the CSU. Table 4 lists the H600-348 cable
specifications.

Table 4: H600-348 cable specifications

Group No. Length Group No. Length

G1 25 feet (7.62 m) G5 125 feet (38.1 m)

G2 50 feet (15.24 m) G6 200 feet (60.96 m)
G3 75 feet (22.86 m) G7 400 feet (121.9 m)
G4 100 feet (30.48 m) G8 650 feet (198 m)

See TN1654 DS1 Converter/TN570B Expansion Interface PN connections up to 200 miles. on

page 78.

Issue 12 February 2007 77

Networking overview

Figure 19: TN1654 DS1 Converter/TN570B Expansion Interface PN connections up to 200

miles.

1 6

3 3

4 5 4

2 2
cycm3014 LAO 010105

Figure notes:

1. Local PN
2. TN570B Expansion Interface circuit pack

3. TN1654 DS1 Converter circuit pack

4. Channel service units (up to 4), each with at T1 trunk

5. Public network (PSTN)

Metallic cable for intracabinet connections

Metallic cable can be substituted for fiber-optic cable for “fiber” connections between EIs or
between an EI and an SNI in the same MCC cabinet, using the same I/O plate connectors.

! DANGER:
DANGER: The metallic cables should not be used for intercabinet connections, since doing
so would violate system ground integrity.

78 Administration for Network Connectivity for Avaya Communication Manager

 Configurations with both IP-PNC and fiber-PNC PNs

Table 5 lists the part numbers and uses for the two (2) metallic cable lengths.

Table 5: Metallic cable specifications

Metallic cable Length Use

part numbers

H600-278,G1 13 inches From an EI in slot 1 of a switch node carrier to an SNI in the

(33 cm) same half of the carrier (usually the adjacent slot)
H600-278,G2 66 inches From an EI to an SNI in the same cabinet, but in a different
(168 cm) carrier or different half of a carrier

Configurations with both IP-PNC and fiber-PNC PNs

Communication Manager R3.1 allows the S8700-series, S8500, S8500B, and S8500C Media
Servers to support configurations that combine IP-PNC port networks (PNs) with direct-connect
PNs, CSS-connected PNs or ATM-connected PNs. Additionally, Communication Manager R3.1
allows the media servers to support configurations that contain both single control networks and
duplicated control networks and both single bearer networks and duplicated bearer networks.
This capability allows customers to do the following:
● Add IP PNs to a fiber-PNC configuration using the simpler, less costly connections over
the customer LAN. In this way, customers can avoid the complication and cost of adding
fiber-PNC PNs. This capability can be especially attractive when it eliminates the need for
installing a DS1C circuit pack and a connection over a T1 trunk to the new PN.
● Convert and consolidate, in an easy, cost-effective way, remote standalone DEFINITY
servers (R, SI, CSI, or S8100) and their PNs into a single network of PNs controlled by,
and administered with, one server.
● Configure, within the single footprint of an MCC1 Media Gateway, multiple port networks,
using IP-PNC, fiber-PNC PNs, or a variety of combinations of the two. In this way,
customers have tremendous flexibility in configuring MCC1 Media Gateways to balance
reliability, call capacities and feature richness.
● Configure reliability into a network in a more cost-effective, flexible way. Duplication of
control and bearer networks can be configured based on the criticality of the location or the
needs of users connected to a particular PN.
Note:
Note: All port networks that are fiber-PNC within a direct-connect, CSS or ATM switch
configuration must still have the same reliability level — all single control and
bearer network, all duplicated control network, or all duplicated control and
bearer network.

Issue 12 February 2007 79

Networking overview

Possibilities for combining IP-PNC and fiber-PNC PNs

in a configuration
A Communication Manager configuration can contain one of the following combinations of port
network connection methods:
● IP-PNC and direct-connect — available with S8500, S8500B, S8500C, S8710 or S8720
Media Servers as main servers, but not as Enterprise Survivable Servers (ESSs)
● IP-PNC and Center Stage Switch (CSS) — available with S8700-series Media Servers as
both main servers and ESSs
● IP-PNC and Asynchronous Transmission Mode (ATM) — available with S8700-series
Media Servers as both main servers and ESSs
Note:
Note: You cannot mix CSS and ATM port network connections in the same
configuration. You also cannot mix direct-connect PN connections with ATM or
CSS port network configurations.
Note:
Note: The DEFINITY Server CSI does not support multiple port networks and,
therefore, does not support combining PN connection methods.
Regardless of the combinations of PN connection methods, the maximum number of PNs
allowed continues to be 64. However, since a server can support IP-PNC and CSS PNs
simultaneously, the following capacity rules apply to a configuration with both IP-PNC and
fiber-PNC PNs:
● With CSS, two to 44 CSS PNs, with additional IP-PNC PNs for a maximum total of 64 PNs
● With ATM, 64 ATM and IP-PNC PNs in any combination
● With direct-connect, two to three direct-connect PNs, with 1 to 62 IP-PNC PNs, for a
maximum total of 64 PNs

Media gateway combinations

Like the G650 Media Gateway, SCC1 and MCC1 Media Gateways can connect to other port
networks using either IP-PNC or fiber-PNC options (direct/CSS/ATM-connect). The CMC1 and
G600 media gateways can be IP-PNC only and cannot be fiber-PNC in any configuration. But,
because a server can use the IP-PNC method with any of the direct, CSS, or ATM connection
methods simultaneously, the server can simultaneously connect CMC1s and/or G600s as
IP-PNC media gateways in the same network that includes direct, CSS, or ATM-connected
G650, SCC1, and/or MCC1 Media Gateways. As a result, a configuration with IP-PNC and
fiber-PNC PNs may contain any or all media gateways that are supported by the current release
of Communication Manager. The following table lists, by server, the media gateways and

80 Administration for Network Connectivity for Avaya Communication Manager

 Configurations with both IP-PNC and fiber-PNC PNs

connection methods that the servers can simultaneously support in a port network
configuration.

Server Supported IP-PNC Direct- CSS/ Reliabilities

Media connect ATM-connect 1 supported
Gateways
S8500C/ CMC1 yes no no single control
S8500B and bearer only
G600 yes no no same as CMC1
G650 yes yes no single control
and bearer,
single control
and duplicated
bearer
SCC1 yes yes no same as G650
MCC1 yes yes no same as G650
S8710/S8720 CMC1 yes no no single control
and bearer only
G600 yes no no same as CMC1
G650 yes yes yes (requires single control
an MCC1 for and bearer,
SNC/CSS) duplicated
control only,
single control
and duplicated
bearer, and
duplicated
control and
bearer
SCC1 yes yes yes (requires same as G650
an MCC1 for
SNC/CSS)
MCC1 yes yes yes same as G650
1. For any system, either CSS or ATM connections may be used, but not both.

Issue 12 February 2007 81

Networking overview

Options for multiple levels of reliability

Within the fiber-PNC portion of a system (direct-, CSS, or ATM-connected PNs), duplicated
bearer reliability using fiber must be uniformly applied, and IPSI duplication must also be
uniform among the PNs that have IPSIs. However, a mixed configuration of IP-PNC and
fiber-PNC PNs may collectively have multiple levels of reliability. The system-wide network of
PNs does not have to be "all duplicated IPSI" or "all simplex IPSI," or "all duplicated bearer" or
"all simplex bearer." TN2602AP circuit pack duplication does not have to be uniform.

Administering an S8700-series Media Server for duplicated

and single control networks
With direct/CSS/ATM PN connections and duplicated control networks, an S8700-series Media
Server’s control network A and control network B interfaces are administered as dedicated
control networks and connected to duplicated IPSI circuit packs in the fiber-PNC PNs. If a
remote IP-PNC PN is introduced into the configuration, the S8700-series Media Server and
IP-PNC PN is administered for a control network over the customer’s LAN. In this case, a third
control network C may be administered on the S8700-series Media Server. The S8700-series
Media Server automatically uses its own customer LAN interface port for Control network
C.Therefore, to administer control network C for IP-PNC PNs, you only have to tell the media
server to turn on control network C.

Dedicated and non-dedicated control networks

Control networks A and B can be separately configured for dedicated and non-dedicated control
networks. You can also use control network C to connect IP-PNC PNs, while using control
networks A and B for dedicated control networks with the fiber-PNC PNs. Control network C
uses the customer LAN exclusively for the control signaling, while control networks A and B
may use either dedicated Ethernet switch connections or the customer LAN for control
signaling.

Requirements for using both IP-PNC and fiber-PNC PNs

A configuration that has both IP-PNC and fiber-PNC PNs requires the following:
● A Communication Manager license that has IP port network Connectivity (IP-PNC) turned
off (that is the feature keyword in the license file, FEAT_IP_PNC, is off and the IP PNC?
field on the Customer Options screen is n)
Communication Manager allows IP-PNC PNs to be added to an existing fiber-PNC
configuration because IP-PNC is already turned off.

82 Administration for Network Connectivity for Avaya Communication Manager

 Configurations with both IP-PNC and fiber-PNC PNs

! CAUTION:
CAUTION: If you want to convert or migrate fiber-PNC SCC1 or MCC1 PNs to IP-PNC PNs,
the RFA license file entry, FEAT_IP_PNC keyword, must be off.
● At least one TN2302AP IP Media Processor or TN2602AP IP Media Resource 320 circuit
pack in a PN in the fiber-PNC PN configuration.
Since an IP-PNC PN does not have fiber connections with the direct, CSS, or ATM PNs,
bearer transmission between IP-PNC PNs and direct/CSS/ATM PNs must occur over the IP
network. Because they convert TDM calls to IP, and IP calls to TDM, the TN2302AP or
TN2602AP circuit packs enable bearer transmission over IP networks.
● The fiber-PNC PN or PNs that contain the TN2302AP or TN2602AP circuit packs serve as
gateways between the IP-PNC and fiber-PNC portions of the configuration. As a result, the
gateway TN2602AP circuit pack or circuit packs must be in a network region that can
reach, and is reachable by, TN2602AP circuit packs in any and all IP-PNC PNs. To be
reachable, the gateway TN2602AP circuit packs can be one or both of the following:
- In the same network region as the TN2602AP or TN2302BP circuit packs of other PNs.
- Mapped to the IP PNC addresses in other network regions.
● Like IP-PNC PNs, fiber-PNC PNs can have up to two TN2602AP circuit packs installed. In
addition, in a fiber-PNC PN, the TN2602AP circuit packs can be either in load-balancing
mode or in duplicated bearer mode.

! CAUTION:
CAUTION: The addition of a TN2302AP or TN2602AP circuit pack to a fiber-PNC PN may
have a significant impact on traffic that must be handled by the PN. That is, in
some scenarios, the PN may not have enough timeslot availability.

For example, the targets of a large number of IP station or trunk calls may be
TDM stations or trunks in fiber-PNC PNs that do not have TN2302AP/TN2602AP
circuit packs. In this case, the talk paths are routed through a fiber-PNC PN
containing the TN2302AP/TN2602AP circuit packs. This routing may exhaust the
484 time slots of the gateway PN and cause calls to be blocked.

To avoid this media processor linking, TN2302AP/TN2602AP circuit packs should

generally be placed in every fiber-PNC PN. This need becomes more apparent
when the gateway PN uses a 320-channel TN2602 instead of an 80-channel
TN2602.

As a result, you should analyze the traffic measurements on such PNs prior to
configuring a PN as a IP-to-TDM gateway.
Note:
Note: IP-PNC PNs always require at least one TN2302AP or TN2602AP circuit pack.

Issue 12 February 2007 83

Networking overview

TN2602AP circuit packs in fiber-PNC PNs

Any fiber-PNC PN can optionally contain TN2302BP or TN2602AP circuit packs in order to
support IP endpoints and trunks. However, to combine IP-PNC PNs in a configuration with
fiber-PNC PNs, a TN2602AP (or optionally, a TN2302BP) circuit pack is required in at least one
of the fiber-PNC PNs that also contains an IPSI connection. A fiber-PNC PN with one of these
circuit packs can then serve as a gateway between the fiber-PNC and IP-PNC portions of the
Communication Manager configuration so the portions can communicate via the LAN/WAN.
Any individual fiber-PNC PN can also contain load-balancing or duplicated TN2602AP circuit
packs. TN2602AP circuit packs do not need to be implemented uniformly within the fiber-PNC
portion of the system. Thus, some PNs may have no TN2602AP circuit packs, some PNs may
have load-balancing TN2602AP circuit packs, and some PNs may have duplicated TN2602AP
circuit packs. Duplicated TN2602AP circuit packs can provide duplicated bearer capability when
the fiber connections do not.

Examples of combining IP-PNC and fiber-PNC PNs

The following sample configurations illustrate some examples of combining IP-PNC and
fiber-PNC PNs. Some examples also illustrate combining different reliability levels.

Example of combining direct- and IP-PNC PNs

Figure 20 illustrates an S8500 Media Server configuration that combines direct-connect PNs
with IP-PNC PNs. The IP-PNC PN is labeled as item 11. The other PNs, items 3 and 5, are
direct-connect PNs.

84 Administration for Network Connectivity for Avaya Communication Manager

 Configurations with both IP-PNC and fiber-PNC PNs

Figure 20: Direct- and IP-PNC PNs example (with S8500 Media Server)

1
disc

14
2
LNK COL Tx Rx FDX Hspd LAG PoE 2 4 6 8 10 12 14 16 18 20 22 24

ROUT SYS PWR

S1 S2 1 3 5 7 9 11 13 15 17 19 21 23

13

13 7

11 3 5

10 10 10 10

12 4 6
6

8 8
cycm3017 LAO 030505 8

Figure notes: Direct- and IP-PNC PNs example (with S8500 Media Server)

1. S8500C or S8500B Media Server

2. LAN connections of media server for remote administration

3. IPSI-connected port network (G650 Media Gateway or G650 stack [shown in figure], MCC1 Media Gateway or SCC1
Media Gateway or SCC1 stack). The PN is part of the fiber-PNC bearer network.
NOTE: G600 or CMC1 Media Gateways can be used in IP-PNC configurations only.

4. PN control gateway or carrier, in the A position in PN 3, which contains:

● A TN2312AP/BP IPSI circuit pack for IP connection to server.

● Two TN570Bv7/C/D EI circuit packs for bearer network connections to the other two PNs (if any).

5. Fiber-PNC PN (G650 Media Gateway or G650 stack [shown in figure], MCC1 Media Gateway, or SCC1 Media Gateway or
SCC1 stack [shown in figure]).

1 of 2

Issue 12 February 2007 85

Networking overview

Figure notes: Direct- and IP-PNC PNs example (with S8500 Media Server) (continued)

6. PN control gateway or carrier within PNs labeled 5, in the A position in the gateway stack or MCC1. The control gateway
contains two TN570Bv7/C/D EI circuit packs for bearer network connections to the other two PNs.
NOTE: One TN2182 Tone Clock circuit pack must also be present per PN if the PN(s) consist of SCC1 or MCC1
Media Gateways. One maintenance-only TN2312AP/BP IPSI circuit pack must be present per PN if the PN(s)
consist of G650 Media Gateways.

7. IPSI-to-server control network connection. Requires dual NIC card on the media server.

8. TN 570Bv7/C/D to 570Bv7/C/D fiber connections between PNs

9. Customer LAN

10. LAN connections, if any, of TN2302AP IP Media Interface or TN2602AP IP Media Resource 320 for IP-TDM voice
processing and optional TN799DP C-LAN for control of IP endpoints and firmware downloads
NOTE: The number of TN2302AP, TN2602AP, and TN799DP circuit packs varies, depending on the number of IP
endpoints, port networks, and adjunct systems. These circuit packs may be inserted into a port carrier (shown in
figure), the PN control carrier, or the duplicated control carrier.

11. IP-PNC PN (G650 Media Gateway or stack [shown in figure]). May also be a G600, SCC1, MCC1, or CMC1 from an S8100
or DEFINITY Server migration.

12. Control gateway in PN 11, in the A position in the gateway stack. The control gateway contains:
● A TN2312AP/BP IPSI circuit pack for IP connection to server.

13. IPSI-to-server control network connection through Ethernet switch and customer LAN.

2 of 2

Example of IP-PNC PNs with different reliability levels

Figure 21 illustrates an S8700-series Media Server configuration that combines duplicated
control/duplicated bearer network, duplicated control-only network, and single control network
reliability configurations in an IP-PNC network. The PN with a single control network is labeled
as item 11. Other PNs, items 3, have duplicated control networks.

86 Administration for Network Connectivity for Avaya Communication Manager

 Configurations with both IP-PNC and fiber-PNC PNs

Figure 21: IP-PNC PNs with single control network, duplicated control networks, and
duplicated control/bearer network example (with S8700-series Media Server)

1 1

Duplex ch 1 ch 2

Duplex ch 1 ch 2
disc disc
COMPACT COMPACT

1 1
2 2

UID UID
5

1
5

1
Simplex

Simplex
12

0
4

2
4

0
2 2
LNK COL Tx Rx FDX Hspd LAG PoE 2 4 6 8 10 12 14 16 18 20 22 24 LNK COL Tx Rx FDX Hspd LAG PoE 2 4 6 8 10 12 14 16 18 20 22 24

ROUT SYS PWR ROUT SYS PWR

S1 S2 1 3 5 7 9 11 13 15 17 19 21 23 S1 S2 1 3 5 7 9 11 13 15 17 19 21 23

10 10

2 2 2
LNK COL Tx Rx FDX Hspd LAG PoE 2 4 6 8 10 12 14 16 18 20 22 24 LNK COL Tx Rx FDX Hspd LAG PoE 2 4 6 8 10 12 14 16 18 20 22 24 LNK COL Tx Rx FDX Hspd LAG PoE 2 4 6 8 10 12 14 16 18 20 22 24

ROUT SYS PWR ROUT SYS PWR ROUT SYS PWR

S1 S2 1 3 5 7 9 11 13 15 17 19 21 23 S1 S2 1 3 5 7 9 11 13 15 17 19 21 23 S1 S2 1 3 5 7 9 11 13 15 17 19 21 23

3 8 3 3 11

7 7 7 7

6 6
6 6 6

5 5 5

4 4 4
12

cycm3018 LAO 102105

Figure notes: IP-PNC PNs with single, duplicated control networks, and duplicated control/bearer
network (with S8700-series Media Server)

1. S8700-series Media Server

2. Ethernet Switch. For local LAN connections, the same pair of Ethernet switches may connect both the media servers and the
media gateways. For remote LAN/WAN connections, the remote gateway(s) must have a pair of Ethernet switches at the
remote location.

1 of 2

Issue 12 February 2007 87

Networking overview

Figure notes: IP-PNC PNs with single, duplicated control networks, and duplicated control/bearer
network (with S8700-series Media Server) (continued)

3. IP-PNC PNs (G650 Media Gateway or stack [shown in figure]). May also be SCC1 or MCC1 Media Gateways from a
DEFINITY Server migration.

4. Control gateway for PN 3, in the A position in the gateway stack. The control gateway contains:
● A TN2312AP/BP IPSI circuit pack for IP connection to server.

5. Duplicated PN control gateway for PN3, in the B position in the gateway stack. The control gateway contains:
● A TN2312AP/BP IPSI circuit pack for IP connection to control network.

6. IPSI-to-server control network connection via Ethernet switch

7. LAN connections of TN2302AP IP Media Interface or TN2602AP IP Media Resource 320 for IP-TDM voice processing and
optional TN799DP C-LAN for control of IP endpoints
NOTE: The number of TN2302AP, TN2602AP, and TN799DP circuit packs varies, depending on the number of IP
endpoints, port networks, and adjunct systems. These circuit packs may be inserted into a port carrier (shown in
figure), the PN control carrier, or the duplicated control carrier.

8. Customer LAN

9. LAN connections of media servers for remote administration

10. Duplicated server links, including the fiber link for translations transfer and the DAL2 link for control data sharing. The link for
control data sharing is implemented through the DAL2 board or (for the S8720 media server) through software duplication

11. IP-PNC PN (G650 Media Gateway or stack [shown in figure]). May also be a G600 Media Gateway or stack or a CMC1 from
an S8100 Media Server or a DEFINITY Server migration, an MCC1 Media Gateway from a DEFINITY Server migration, or
an SCC1 Media Gateway.

12. PN control gateway, in the A position in the gateway stack, for PN 11. The control gateway contains:
● A TN2312AP/BP IPSI circuit pack for IP connection to server.

2 of 2

Example of combining IP- and fiber-PNC PNs with different

reliability levels
Figure 22 illustrates an S8700-series Media Server configuration that combines the following:
● Fiber-PNC PNs (CSS-connected PNs in this example) with standard single control
network reliability and duplicated (item 3 in Figure 22), load-balancing (item 7 in
Figure 22), single (item 9 in Figure 22), and no (item 21 in Figure 22) TN2602AP circuit
packs.
● An IP-PNC PN (item 17 in Figure 22) with duplicated control and duplicated bearer
network reliability.
Note:
Note: The IP-PNC PN (item 17 in Figure 22) is connected to two Ethernet switches on
the customer network since the CSS-connected PNs are connected to the server
over a single dedicated Ethernet switch.

88 Administration for Network Connectivity for Avaya Communication Manager

 Configurations with both IP-PNC and fiber-PNC PNs

Figure 22: CSS-connected PNs (single control network) and IP-PNC PNs (duplicated
control and duplicated bearer network) example

Duplex ch 1 ch 2
disc
COMPACT

1
2
LNK COL Tx Rx FDX Hspd LAG PoE 2 4 6 8 10 12 14 16 18 20 22 24
UID

1
ROUT SYS PWR

1
5

1
15

Simplex
S1 S2 1 3 5 7 9 11 13 15 17 19 21 23

0
4

2
4

0
16
2

Duplex ch 1 ch 2
disc
COMPACT

LNK COL Tx Rx FDX Hspd LAG PoE 2 4 6 8 10 12 14 16 18 20 22 24

15 1
2

UID

1
ROUT SYS PWR

1
5

Simplex
S1 S2 1 3 5 7 9 11 13 15 17 19 21 23

0
4

2
4

0
20
LNK COL Tx Rx FDX Hspd LAG PoE 2 4 6 8 10 12 14 16 18 20 22 24

2
ROUT SYS PWR

S1 S2 1 3 5 7 9 11 13 15 17 19 21 23

13
LNK COL Tx Rx FDX Hspd LAG PoE 2 4 6 8 10 12 14 16 18 20 22 24

2
ROUT SYS PWR

14 S1 S2 1 3 5 7 9 11 13 15 17 19 21 23

17

3
20
6

20 14

14
4
6

12

19
5

18

7 9

11 11

21

8 10
10

cycm3019 LAO 112105

Issue 12 February 2007 89

Networking overview

Figure notes: CSS-connected PNs (single control network) and IP-PNC PNs (duplicated
control and duplicated bearer network) example
1. S8700/S8710/S8720 Media Server

2. Ethernet Switch

3. Fiber-PNC MCC1 Media Gateway (CSS and PN) with duplicated TN2602AP circuit packs. This PN serves as the gateway
PN to IP-PNC PNs.

4. Control carrier for PN 3, in the A position in the MCC1. The control carrier contains:
● A TN2312AP/BP IPSI circuit pack for IP connection to server.

● A TN570Bv7/C/D EI circuit pack for bearer network connections to the Switch Node Carrier (SNC).

5. Switch node carrier (SNC), which contains:

● Multiple TN573 SNI circuit packs for EI connections to PNs

6. IPSI-to-server control network connection via Ethernet switch

7. Second fiber-PNC and IPSI-connected PN (G650 Media Gateway or stack [shown in figure], MCC1 Media Gateway, or
SCC1 Media Gateway stack). This PN has load-balancing TN2602AP circuit packs and also serves as a gateway to
IP-PNC PNs.

8. Control gateway or carrier for PN 7, in the A position in the stack. The control gateway or carrier contains:
● A TN2312AP/BP IPSI circuit pack for IP connection to server.

● A TN570Bv7/C/D EI circuit pack for bearer network connections to the SNI.

9. Fiber-PNC PN (MCC1 Media Gateway, SCC1 Media Gateway, or G650 Media Gateway stack [shown]) consisting of one or
more media gateways or carriers. This PN has one TN2602AP circuit pack.

10. Control gateway or carrier in the A position in the stack. The control gateway or carrier contains:
● A TN570Bv7/C/D EI circuit pack for bearer network connections to the SNI.

NOTE: One TN2182 Tone Clock circuit pack must also be present per PN if the PN(s) consist of SCC1 or MCC1
Media Gateways. One maintenance-only TN2312AP/BP IPSI circuit pack must be present per PN if the PN(s)
consist of G650 Media Gateways.

11. TN 570Bv7/C/D to TN573 fiber connections between PNs and SNC

12. TN 573/570Bv7/C/D fiber connections between the SNCs and the A carrier (if the MCC1 is a PN)
13. Customer LAN

14. LAN connections of TN2302AP IP Media Interface, TN2602AP IP Media Resource 320, or TN799DP C-LAN for control of
IP endpoints
NOTE: The number of TN2302AP and TN799DP circuit packs varies, depending on the number of IP endpoints,
port networks, and adjunct systems. These circuit packs may be inserted into a port carrier (shown in figure) or the
PN control carrier.

15. LAN connections of media servers for remote administration

16. Duplicated server links, including the fiber link for translations transfer and the DAL2 link or software duplication link for
control data sharing

17. IP-PNC PN (G650 Media Gateway or stack [shown in figure]). May also be an MCC1 from a DEFINITY Server migration or
an SCC1.

1 of 2

90 Administration for Network Connectivity for Avaya Communication Manager

 Configurations with both IP-PNC and fiber-PNC PNs

Figure notes: CSS-connected PNs (single control network) and IP-PNC PNs (duplicated
control and duplicated bearer network) example (continued)
18. Control gateway or carrier, in the A position in the gateway stack, for PN 17. The control gateway contains:
● A TN2312AP/BP IPSI circuit pack for IP connection to server.

NOTE: For the G650 Media Gateway, the BP version of the TN2312 is required in order to provide
environmental maintenance.
● A TN2602AP IP Media Resource 320 for PN bearer connections over the LAN

NOTE: The TN2602AP circuit pack may be placed in any gateway in the PN. However, the pair of TN2602AP
circuit packs should be separated between two different gateways whenever possible.

19. Media gateway or carrier, in the B position in the gateway stack, , which contains:
● A duplicated TN2312AP/BP IPSI circuit pack for duplicated control network to PN 17.

● A duplicated TN2602AP IP Media Resource 320 for PN bearer connections over the LAN.

NOTE: The TN2602AP circuit pack may be placed in any gateway in the PN. However, the pair of TN2602
circuit packs should be separated between two different gateways whenever possible.

20. LAN connections of duplicated TN2602AP IP Media Resource 320 circuit packs for IP-TDM voice processing. Connections
to separate Ethernet switches are recommended, but not required.

21. Fiber-PNC PN (MCC1 Media Gateway, SCC1 Media Gateway, or G650 Media Gateway stack [shown]) consisting of one or
more media gateways or carriers. This PN has no TN2602AP circuit packs and relies only on fiber connections for the
bearer network.

2 of 2

Example of combining IP- and ATM-connected PNs and different

reliability levels
Figure 23 illustrates an S8710 Media Server configuration that combines ATM-connected PNs
with standard duplex-server-only reliability and IP-PNC PNs with duplicated control network
reliability.
Note:
Note: In this example, the IP-PNC PN (item 22 in Figure 23) is connected to two
Ethernet switches on the customer network since the ATM-connected PNs are
connected to the server over a dedicated Ethernet switch.

Issue 12 February 2007 91

Networking overview

Figure 23: Example of ATM-connect PNs with single control network and IP-PNC PNs with
duplicated control network

1 1

Duplex ch 1 ch 2

Duplex ch 1 ch 2
disc disc
COMPACT COMPACT

1 1
2 2

21
UID UID

1
5

1
Simplex

Simplex
0

0
4

2
4

0
20
LNK COL Tx Rx FDX Hspd LAG PoE 2 4 6 8 10 12 14 16 18 20 22 24

2
ROUT SYS PWR

15
S1 S2 1 3 5 7 9 11 13 15 17 19 21 23

14
18 19
8
13
3 7
16
5
19

4
6

19

12
9

17
17
2
LNK COL Tx Rx FDX Hspd LAG PoE 2 4 6 8 10 12 14 16 18 20 22 24

ROUT SYS PWR

S1 S2 1 3 5 7 9 11 13 15 17 19 21 23

22 10 10
LNK COL Tx Rx FDX Hspd LAG PoE 2 4 6 8 10 12 14 16 18 20 22 24

ROUT SYS PWR

S1 S2 1 3 5 7 9 11 13 15 17 19 21 23

17 17
2

10

17

7
24

11 11
23 11

cycm3020 LAO 031405

92 Administration for Network Connectivity for Avaya Communication Manager

 Configurations with both IP-PNC and fiber-PNC PNs

Figure notes: Example of ATM-connect PNs with single control network and IP-PNC PNs with
duplicated control network

1. S8710/S8720 Media Server

2. Ethernet Switch

3. Fiber-PNC PN (MCC1 [shown], SCC1, or G650 Media Gateway)

NOTE: A TN2302AP Media Interface or TN23602 Media Resource 320 for IP-TDM voice processing is required in
at least one fiber-PNC PN for the combined PN connection methods to work.

4. Control carrier, in the A position in the MCC1, for PN 3. The control carrier contains:
● A TN2312AP/BP IPSI circuit pack for IP connection to server.

● A TN2305 or TN2306 circuit pack for bearer network connections to the ATM switch.

5. Carrier with TN464GP DS-1 circuit pack, for clock synchronization with a network resource

6. ATM switch.

7. IPSI-to-server control network connection via Ethernet switch

8. Fiber-PNC and server-connected PN (G650 Media Gateway stack [shown],MCC1 Media Gateway, or SCC1 Media
Gateway stack, consisting of at least two media gateways or carriers).

9. Control gateway or carrier, in the A position in the stack, for PN 8. The control gateway contains:
● A TN2312AP/BP IPSI circuit pack for IP connection to server.

● A TN2305 or T2306 circuit pack for bearer network connections to the ATM switch.

10. Fiber-PNC PN (G650 Media Gateway stack (shown), MCC1 Media Gateway, SCC1 Media Gateway stack [shown]),
consisting of at least two media gateways or carriers.

11. Control gateway or carrier, in the A position in the stack, for PN 10. The control gateway contains:
● A TN2305 or TN2306 circuit pack for bearer network connections to the ATM switch.

NOTE: One TN2182 Tone Clock circuit pack must also be present per PN if the PN(s) consist of SCC1 or MCC1
Media Gateways. One maintenance-only TN2312BP IPSI circuit pack must be present per PN if the PN(s) consist of
G650 Media Gateways.
12. OC-3 connections to the ATM switch

13. Sync splitter

14. Public network (PSTN)

15. DS1 connection to sync splitter.

16. Timing signal to ATM switch from sync splitter.

17. Fiber connections from TN2305/TN2306 to ATM switch.

18. Customer LAN

19. LAN connections of TN2302AP Media Interface or TN2602AP Media Resource 320 for IP-TDM voice processing and
optional TN799DP C-LAN for control of IP endpoints

20. LAN connections of media servers for remote administration

21. Duplicated server links, including the fiber link for translations transfer and the link for control data sharing. The link for
control data sharing is implemented through the DAL2 board or (for the S8720 media server) through software duplication.

22. IP-PNC PN (G650 Media Gateway or stack [shown in figure]). May also be an MCC1 from a DEFINITY Server migration or
an SCC1.

23. Control gateway, in the A position in the gateway stack, for PN 22. The control gateway contains:
● A TN2312AP/BP IPSI circuit pack for IP connection to server.

24. Media gateway, in the B position in the gateway stack, with duplicated TN2312AP/BP IPSI circuit pack for duplicated
control network to server.

Issue 12 February 2007 93

Networking overview

MCC1 Media Gateway with IP-PNC PNs or a combination of IP-

and fiber-PNC PNs
An MCC1 Media Gateway may contain up to 5 PNs, with each carrier administered as a
fiber-PNC PN. For migrations and conversions only to Communication Manager R3.0, an
MCC1 can also support from 1 to 5 IP-PNC PNs, or both IP-PNC and fiber-PNC PNs. In this
way, a combination of PN connection methods may exist on a single MCC1 Media Gateway.
An MCC1 may also contain up to two IP-PNC PNs with duplicated control networks. However, if
a server-connected MCC1 uses duplicated bearer networks with CSS, such that switch node
carriers must occupy the D and E positions on the MCC1, the MCC1 Media Gateway may
house up to three PNs, but only one PN can have duplicated control.
The following tables identify the port network configuration options for IP-PNC and combined
IP- and fiber-PNC PNs in an MCC1 Media Gateway.

Options for IP-PNC PNs in an MCC1 Media Gateway

The following diagrams indicate the PN options available using a single MCC1 Media Gateway
with all-IP-PNC PNs. Each PN within the MCC1 Media Gateway is indicated by bold borders
(— ). Carriers within PNs are indicated by thin borders (—).

MCC1 with 1 MCC1 with 1 MCC1 with 2 MCC1 with 2 MCC1 with 2
PN PN PNs PNs PNs
with single with with single one with both with
control duplicated control duplicated duplicated
control control control

C Carrier

B Carrier IPSI IPSI

(secondary) (secondary)

A Carrier IPSI IPSI (primary) IPSI IPSI IPSI (primary)

D Carrier IPSI IPSI

(secondary) (secondary)

E Carrier IPSI IPSI (primary) IPSI (primary)

94 Administration for Network Connectivity for Avaya Communication Manager

 Configurations with both IP-PNC and fiber-PNC PNs

MCC1 with 3 MCC1 with 3 MCC1 with 4 MCC1 with 4 MCC1 with 5
PNs PNs PNs PNs PNs
with single one with with single one with with single
control duplicated control duplicated control
control control

C Carrier IPSI IPSI IPSI

B Carrier IPSI IPSI IPSI IPSI IPSI

A Carrier IPSI IPSI IPSI IPSI IPSI

D Carrier IPSI IPSI IPSI IPSI IPSI

(secondary) (secondary)

E Carrier IPSI (primary) IPSI (primary) IPSI

Options for combined IP- and fiber-PNC PNs in an MCC1 Media

Gateway (single control network)
The following diagrams indicate the PN options available using a single MCC1 Media Gateway
with IP-PNC PNs, fiber-PNC (direct, CSS, or ATM-connected) PNs, and single control networks.
Where "fiber-PNC" is indicated, the PN may contain an IPSI for a connection to the server or
may only contain expansion interface circuit packs for fiber connections to other PNs. Each PN
within the MCC1 Media Gateway is indicated by bold borders ( —). Carriers within PNs are
indicated by thin borders (—).

MCC1 with 2 MCC1 with 3 MCC1 with 4 MCC1 with 5

PNs PNs PNs PNs
with single with single with single
control control control

C Carrier IP-PNC or IP-PNC or

fiber-PNC fiber-PNC

B Carrier IP-PNC or IP-PNC or IP-PNC or

fiber-PNC fiber-PNC fiber-PNC

A Carrier IP-PNC or fiber- IP-PNC or IP-PNC or IP-PNC or

connected fiber-PNC fiber-PNC fiber-PNC

D Carrier IP-PNC or IP-PNC or IP-PNC or

fiber-PNC fiber-PNC fiber-PNC

E Carrier IP-PNC or IP-PNC or

fiber-PNC fiber-PNC

Issue 12 February 2007 95

Networking overview

Options for combined IP- and fiber-PNC PNs in an MCC1 Media

Gateway (duplicated control networks)
The following diagram indicates the PN options available using a single MCC1 Media Gateway
with IP-PNC PNs, fiber-PNC (direct, CSS, or ATM-connected) PNs, and duplicated control
networks. Each PN within the MCC1 Media Gateway is indicated by bold borders ( ). —
Carriers within PNs are indicated by thin borders (—).
Note:
Note: The configurations in the following diagram assume the bearer network for the
fiber-PNC PNs is not duplicated. For configurations with duplicated bearer
networks, see Options for combined IP- and fiber-PNC PNs in an MCC1 Media
Gateway (duplicated control and bearer networks) on page 97.

MCC1 with 2 MCC1 with 2 MCC1 with 2 MCC1 with 3 MCC1 with 4
PNs PNs PNs PNs PNs
one with one with both with one with one with
duplicated duplicated duplicated duplicated duplicated
control control1 control control control

C IPSI for IP-PNC

Carrier or fiber-PNC with
no IPSI

B IPSI for IP-PNC IPSI for IP-PNC IPSI for IP-PNC PSI for IP-PNC or
Carrier or (secondary) or fiber-PNC with fiber-PNC with no
IPSI for fiber-PNC no IPSI1 IPSI
(secondary)

A IPSI for IP-PNC IPSI for IP-PNC, IPSI for IP-PNC IPSI for IP-PNC IPSI for IP-PNC
Carrier or IPSI for (primary) or fiber-PNC with or fiber-PNC with
IPSI for fiber-PNC fiber-PNC, no IPSI1 no IPSI
(primary) or fiber-PNC with
no IPSI

D IPSI for IP-PNC IPSI for IP-PNC IPSI for IP-PNC IPSI for IP-PNC
Carrier or (secondary) (secondary) (secondary)
IPSI for fiber-PNC
(secondary)

E IPSI for IP-PNC, IPSI for IP-PNC IPSI for IP-PNC IPSI for IP-PNC IPSI for IP-PNC
Carrier IPSI for or (primary) (primary) (primary)
fiber-PNC, IPSI for fiber-PNC
or fiber-PNC with (primary)
no IPSI
1. If the PN using Carriers D and E is fiber-PNC with duplicated IPSIs, Carriers A, B, and C may not contain IP-PNC
PNs.

96 Administration for Network Connectivity for Avaya Communication Manager

 Configurations with both IP-PNC and fiber-PNC PNs

Options for combined IP- and fiber-PNC PNs in an MCC1 Media

Gateway (duplicated control and bearer networks)
The following diagram indicates the PN options available using a single MCC1 Media Gateway
with an IP-PNC PN with a duplicated control network and a fiber-PNC (direct, CSS, or
ATM-connected) PN with duplicated control and bearer networks. Each PN within the MCC1
Media Gateway is indicated by bold borders ( —
). Carriers within PNs are indicated by thin
borders (—).
Note:
Note: In the following illustration, the ISPIs that enable a duplicated control network for
the fiber-PNC PN reside in another fiber-PNC PN.

MCC1 with 2 PNs MCC1 with 2 PNs

one with one with
duplicated control duplicated control
and bearer and bearer
network1 network1

C Carrier

B Carrier IPSI for IP-PNC Fiber-PNC with no

(secondary) IPSI
(secondary)
A Carrier IPSI for IP-PNC Fiber-PNC with no
(primary) IPSI
(primary)
D Carrier Fiber-PNC with no IPSI for IP-PNC
IPSI (secondary)
(secondary)
E Carrier Fiber-PNC with no IPSI for IP-PNC
IPSI (primary)
(primary)
1. Duplicated bearer only available with PN that is
fiber-PNC. Duplicated control exists in a different
IPSI-connected PN.

Example of MCC1 IP-PNC

Figure 24 illustrates an S8700-series Media Server configuration that uses the carriers in an
MCC1 Media Gateway as IP-PNC PNs. This configuration is available with a migration from a
DEFINITY Server SI or R or a conversion from fiber-PNC to IP-PNC only. The example shows
one PN with duplicated IPSIs (item 5) and two PNs (items 4 and 6) with single IPSIs, one
consisting of a single carrier and the other with two carriers.

Issue 12 February 2007 97

Networking overview

Figure 24: MCC1 Media Gateway with carriers as IP-PNC PNs (duplicated control network)
example

1 1

Duplex ch 1 ch 2

Duplex ch 1 ch 2
disc disc
COMPACT COMPACT

1 1
2 2

UID UID
5

1
11
5

1
Simplex

Simplex
0

0
4

2
4

0
2 2
10 LNK COL Tx

ROUT SYS PWR

Rx FDX Hspd LAG PoE 2 4 6 8 10 12 14 16 18 20 22 24 LNK COL Tx

ROUT SYS PWR

Rx FDX Hspd LAG PoE 2 4 6 8 10 12 14 16 18 20 22 24
10
S1 S2 1 3 5 7 9 11 13 15 17 19 21 23 S1 S2 1 3 5 7 9 11 13 15 17 19 21 23

2 2
LNK COL Tx Rx FDX Hspd LAG PoE 2 4 6 8 10 12 14 16 18 20 22 24 LNK COL Tx Rx FDX Hspd LAG PoE 2 4 6 8 10 12 14 16 18 20 22 24

ROUT SYS PWR ROUT SYS PWR

S1 S2 1 3 5 7 9 11 13 15 17 19 21 23 S1 S2 1 3 5 7 9 11 13 15 17 19 21 23

8
8 7 3 7

cycm3022 LAO 032305

98 Administration for Network Connectivity for Avaya Communication Manager

 Configurations with both IP-PNC and fiber-PNC PNs

Figure notes: MCC1 Media Gateway with carriers as IP-PNC PNs (duplicated control
network) example
1. S8700-series Media Server

2. Ethernet Switch

3. MCC1 Media Gateway

4. IP-PNC PN, with one expansion port carrier in the A position, which contains:
● A TN2312AP/BP IPSI circuit pack for IP connection to server.

● A TN2302AP Media Interface or TN2602AP IP Media Resource 320 for IP-TDM voice processing

● An optional TN799DP C-LAN for control of IP endpoints

5. IP-PNC PN, with two carriers, which contains:

● E-position port carrier

- A TN2312AP/BP IPSI circuit pack for IP connection to server.

● D-position port carrier

- A TN2312AP/BP IPSI circuit pack for IP connection to server.

- A TN2302AP IP Media Interface or TN2602AP IP Media Resource 320 for IP-TDM voice processing
- An optional TN799DP C-LAN for control of IP endpoints

6. IP-PNC PN, with two carriers, which contains:

● C-position port carrier

- A TN2302AP IP Media Interface or TN2602AP IP Media Resource 320 for IP-TDM voice processing
- An optional TN799DP C-LAN for control of IP endpoints
● B-position port carrier

- A TN2312AP/BP IPSI circuit pack for IP connection to server.

7. IPSI-to-server control network connection via Ethernet switch

8. LAN connections of TN2302AP IP Media Interface or TN2602AP IP Media Resource 320 for IP-TDM voice processing and
optional TN799DP C-LAN for control of IP endpoints
NOTE: The number of TN2302AP, TN2602AP, and TN799DP circuit packs varies, depending on the number of IP
endpoints, port networks, and adjunct systems. These circuit packs may be inserted into a port carrier (shown in
figure) or the PN control carrier.

9. Customer LAN

10. LAN connections of media servers for remote administration

11. Duplicated server links, including the fiber link for translations transfer and the DAL2 link for control data sharing. The link
for control data sharing is implemented through the DAL2 board or (for the S8720 media server) through software
duplication.

Example of MCC1 with IP- and fiber-PNC PNs

Figure 25 illustrates an S8700-series Media Server configuration that uses the carriers in an
MCC1 Media Gateway as both fiber-PNC and IP-PNC PNs. The MCC1 Media Gateway (item 3)
contains two IP-PNC PNs (items 5 and 6) with a third CSS-connected PN consisting of a single
carrier (item 4). With a TN2602AP IP Media Resource 320 or TN2302AP IP Media Processor,
the CSS-connected PN serves as a gateway between the IP-PNC PNs and the fiber-PNC PNs.
Note that the MCC1 Media Gateway also contains a CSS or Switch Node Carrier (SNC).

Issue 12 February 2007 99

Networking overview

Figure 25: MCC1 Media Gateway with IP- and fiber-PNC PNs example

Duplex ch 1 ch 2

Duplex ch 1 ch 2
disc disc
COMPACT COMPACT

1 1
2 2

UID UID

1
16

1
Simplex

Simplex
0

0
4

2
4

0
1 1
15 15 2
LNK COL Tx Rx FDX Hspd LAG PoE 2 4 6 8 10 12 14 16 18 20 22 24

ROUT SYS PWR

S1 S2 1 3 5 7 9 11 13 15 17 19 21 23

13 8

14 4

12
6

14

9 9

11 11 11

10 10
10

cycm3021 LAO 031405

100 Administration for Network Connectivity for Avaya Communication Manager

 Configurations with both IP-PNC and fiber-PNC PNs

Figure notes: MCC1 Media Gateway with IP- and fiber-PNC PNs
1. S8700-series Media Server

2. Ethernet Switch

3. MCC1 Media Gateway (CSS and PN)

4. CSS-connected PN carrier, in the A position, which serves as a gateway to IP-PNC PNs. The PN contains:
● A TN2312AP/BP IPSI circuit pack for IP connection to server.

● A TN570Bv7/C/D EI circuit pack for bearer network connections to the Switch Node Carrier (SNC).

● A TN2302AP IP Media Processor or TN2602AP IP Media Resource 320 circuit pack. These circuit packs enable
the PN to be a gateway between the fiber-PNC and IP-PNC PNs.
● An optional TN799DP C-LAN circuit pack for control of IP endpoints

5. IP-PNC PN, consisting of carriers in the B and C positions. Carrier B contains:

● A TN2312AP/BP IPSI circuit pack for IP connection to server. The bottom carrier in the PN must contain the
primary IPSI circuit pack.
Carrier C contains:
● A TN2302AP IP Media Processor or TN2602AP IP Media Resource 320 circuit pack.

● An optional TN799DP C-LAN circuit pack for control of IP endpoints

These circuit packs can actually be inserted in any carrier within the PN.

6. IP-PNC PN, consisting of one carrier in the D position. Carrier D contains:

● A TN2312AP/BP IPSI circuit pack for IP connection to server.

● A TN2302AP IP Media Processor or TN2602AP IP Media Resource 320 circuit pack.

● An optional TN799DP C-LAN circuit pack for control of IP endpoints

7. Switch node carrier (SNC) or CSS, which contains:

● Multiple TN573 SNI circuit packs for EI connections to PNs

8. IPSI-to-server control network connection via Ethernet switch

9. CSS-connected PN (G650 Media Gateway or stack [shown in figure], MCC1 Media Gateway, or SCC1 Media Gateway
stack [shown in figure]).

10. Control gateway or carrier, in the A position in the stack, for PNs labeled 9. The control gateway contains:
● A TN2312AP/BP IPSI circuit pack for IP connection to server.

● A TN570Bv7/C/D EI circuit pack for bearer network connections to the SNI.

11. TN 570Bv7/C/D to TN573 fiber connections between PNs and SNC

12. TN 573/570Bv7/C/D fiber connections between the SNCs and the B carriers (if the MCC1 is a PN)

13. Customer LAN

14. LAN connections of TN2302AP IP Media Interface or TN2602AP IP Media Resource 320 for IP-TDM voice processing and
optional TN799DP C-LAN for control of IP endpoints
NOTE: The number of TN2302AP, TN2602AP, and TN799DP circuit packs varies, depending on the number of IP
endpoints, port networks, and adjunct systems. These circuit packs may be inserted into a port carrier or the PN
control carrier.

15. LAN connections of media servers for remote administration

16. Duplicated server links, including the fiber link for translations transfer and link for control data sharing. The link for control
data sharing is implemented through the DAL2 board or (for the S8720 media server) through software duplication.

Issue 12 February 2007 101

Networking overview

ESS support for combined IP- and fiber-PNC PNs

Any Enterprise Survivable Server (ESS) can also support a combined IP- and fiber-PNC
configuration in the event of failover to the ESS. Both an S8500/S8500B/S8500C and an
S8700-series ESS can support single control and duplicated control networks for both the
IP-PNC and fiber-PNC portions of the configuration, However, the ESSs can support only those
CSS- or ATM-connected PNs that individually have a TN2312AP/BP IPSI circuit pack and either
a TN2302AP IP Media Processor or TN2602AP IP Media Resource 320 circuit pack. This
limitation exists because the ESS provides only IP-PNC control and bearer service to PNs.
For more information on ESS, see the Using the Avaya Enterprise Survivable Servers (ESS),
03-300428.

102 Administration for Network Connectivity for Avaya Communication Manager

Chapter 2: Control Networks for S8700-Series and
S8500 Media Servers

Control networks are the networks over which media servers, such as the S8700-series or
S8500 Media Servers, exchange signaling data with the port networks through the IPSI circuit
packs.
This chapter provides information on how to set up control networks. Topics covered include:
● Control network C
● Combining fiber-connected and IP-connected port networks in a single configuration
● Network connectivity between S8700-series servers and port networks
● Control network on customer LAN (CNOCL)

Control network C
Control network C (CNC) was introduced in Avaya Communication Manager 3.0. It allows
control connectivity to be passed through the customer network interface. This functionality is
introduced to simplify the network design for enterprises with local private control networks
(control network A and control network B) who wish to use their corporate network to support
remote IPSI-controlled port networks.
Control network C functionality is useful in situations where an enterprise is adding distributed
port networks at remote sites connected to a centralized S8700-series or S8500 server. Using
control network C allows the enterprise to keep CNA and CNB on a private network while other
port networks communicate remotely. This can help maintain the security and reliability of the
existing port networks connected to control networks A and B. New port networks can still
connect to the media server without extending control networks A and B to remote sites nor
requiring the use of static routes on the S8700-series or S8500 media servers.

! Important:
Important: Control network C is a server enhancement. control network C could be used in
an all IP-connected scenario, as well as a scenario in which fiber-connected and
IP-connected port networks are connected in a single configuration.
To enable, disable or report the current status for control network C on an Avaya S8700-series
or S8500 Media Server, use the graphical maintenance web interface.
Avaya recommends that port networks be attached to private control networks A and B within a
building, but that remote port networks connect to the media servers through control network C.
This offers protection against network disruptions and Denial of Service (DoS) attacks to Port

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Networks in the central site, while offering flexibility and reducing costs when attaching port
networks at remote sites.

CNC configuration: Multi-site private CNA, CNB,

with remote PNs on public LAN
This example shows the connection of local private control networks using the existing public
enterprise network to provide connectivity to a remote site with an IPSI-controlled port network
and an S8500 ESS server. The local control networks are designated as private in this case
because the IP addressing of these control networks will not be routable through the enterprise
network. The control network at the remote site is designated as public because it is fully
routable throughout the enterprise network. The Control connection from the S8700 to the
remote IPSI is established through the “Customer LAN”, or the third interface connected to the
enterprise network. This configuration is particularly appropriate for large main sites, which
require a fully redundant architecture, with smaller remote sites that do not require the same
level of redundancy.
This design provides for total protection of the local control networks from any enterprise
network failures; however, the remote site may be affected by enterprise network issues.
Configuration is simplified because the default route of the CNC interface allows the CNC
interface to communicate across the enterprise routed network infrastructure without requiring
static routes.

Advantages: - The dedicated control network provides total isolation from outages in the
enterprise network, so all local TDM communication at the main site can remain active during
total enterprise network failure. There are no static routes to maintain.

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 Combining fiber-connected and IP-connected port networks in a single configuration

Disadvantages: - The remote site can be affected by public enterprise network issues. The
remote ESS server cannot control the port networks at the main site.

Combining fiber-connected and IP-connected port

networks in a single configuration
With Communication Manager 3.0 and later, Avaya extends “Control Network on Customer
LAN” functionality to simplify network configuration by allowing both fiber-connected and
IP-connected port networks in a single configuration. With combined port network functionality,
enterprises can attach IP-connected, ATM-connected, or center-stage-connected port networks
to their S8700-series media server. Likewise, they can attach IP-connected or fiber-connected
PNs to their S8500 media server(s).
To support combined port networks, Avaya has enhanced the flexibility of control networks for
port network attachment. In addition to private control networks A and B, Avaya allows the
“Customer LAN” Ethernet interface to be used as a third, public control network, Control
network C.

Sample configurations

Network connectivity between S8700-series servers and port networks

The Avaya S8700 solution requires IP connectivity between S8700-series interfaces and Avaya
media gateways. IP-connected port networks use IPSI cards in the port networks to
communicate with the Media Server. This connection will be referred to as the “Control
Connection”. There are many network options to provide this connectivity, and it is at the
enterprise’s discretion how this is best implemented in its environment.
If IP connectivity, including the control connection, between the server and port network is lost,
the server will be unable to provide call control, resulting in an unstable system. Although the
Avaya S8700-series media server interfaces provide for Denial of Service protection, they
cannot affect the ability of the network to successfully forward packets during a virus or worm
attack, or when the network becomes unstable due to network outages or administrative errors.
In hybrid environments (such as, IP and TDM endpoints and trunks), the incentive to minimize
disruption of the IP control connection is increased. By maintaining the control connection when
other network components have failed, TDM-connected endpoints will continue to function.
The following examples illustrate common methods for designing the control connection
between S8700-series servers and IP-connected port networks. They identify advantages and
disadvantages of each, so enterprises can select the appropriate solution for their environment.

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Example 1: IP-connected, single-site, single subnet

This design connects all Avaya server and gateway interfaces to a single VLAN. This solution is
used primarily in small sites of less than 500 users.

Advantages: - Simple; no host-based static routing required.

Disadvantages: - Provides no control point to protect the “control connection” from network
conditions that would not allow IP packets to reach their destinations. Because endpoints on the
enterprise data Network (even if given a separate “Voice VLAN”) must access C-LANs and
Media Processors using a large variety of ports, the control connection can be negatively
affected by DoS attacks, viruses, network convergence events, and so on.

Example 2: IP-connected, single-site, with a dedicated "control" network

This design connects all Avaya servers and IPSIs to a dedicated control network. C-LANS and
Media Processors are connected to a separate voice VLAN. Additional separation from the
infrastructure can be achieved by using a separate isolated switch for the dedicated control
network, providing resiliency from spanning tree calculations and DoS attacks that could
potentially disrupt a switch connected to the enterprise infrastructure. This design is typical in
large single site deployments. Firewalls are often used to provide additional security.

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Advantages: - Provides a control point to limit traffic allowed on the control network. An
additional switch can provide protection against enterprise network failures. No host-based
static routing required.

Disadvantages: - Requires an additional VLAN or dedicated switch/router interface.

Example 3: IP-connected, single-site, with an isolated "control" network

An isolated control network provides little value if the isolation is through the use of VLANs only.
A switch not connected to any network infrastructure will provide full protection form external
attack. It is still possible to administer the Avaya Communication Manager server through a
properly configured C-LAN connected to the enterprise network. This design is not common, but
is used by some enterprises to provide total isolation of the control network.

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Advantages: - Provides total isolation of the control network. No host-based static routing
required.

Disadvantages: - Requires an additional switch. The user cannot access the Web interface
from the enterprise network. The user must configure a C-LAN card to accept administration
connections.

Example 4: IP-connected, multi-site, single subnet, with a backup cluster/ESS

This design connects all Avaya server and gateway interfaces to a single VLAN per location. It
is important to note that for the primary cluster to control the port networks at the remote site,
the primary servers must have IP connectivity to the remote IPSIs. Also, for the backup cluster
to take control of the primary sites port networks, it must have IP connectivity to the primary site
IPSIs across the network. This design is not often used. Most large sites have chosen to
separate the control network for increased reliability.

Advantages: - Simple; no host-based static routing required.

Disadvantages: - Provides no control point to protect the “control connection” from network
conditions that would not allow IP packets to reach their destinations. Using this design, the
control connection can be negatively affected by DoS attacks, viruses, spanning tree
calculations, and so on. Any disruption in IP connectivity will also disrupt the TDM connections.

Example 5: IP-connected, multi-site, with a dedicated routed "control" network

The above example shows two sites: the main site with the primary server cluster, and a remote
site with a backup cluster. To provide protection of the Server-to-IPSI link, Avaya recommends
the use of a dedicated control network. For backup cluster redundancy, it is a requirement that
each server pair be able to communicate across the enterprise network to control remote port
networks.

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It is not a requirement, nor is it recommended that the voice (or data) networks be able to
communicate using the control networks. It is recommended that strong access lists or a firewall
separate the voice and data networks from the control network to limit traffic allowed from the
outside networks. Tight control of the rule set can then allow for specific stations to access the
web interface of the S8700 Servers. Once again, the IP control connection must be permitted
through any access lists or firewalls. Control connectivity is required between each server
cluster and the IPSIs of any port network they wish to control. This is the most prevalent design
in large corporate infrastructures supporting the Avaya S8700-series IP Telephony Solutions.

Advantages: - Provides a control point to limit traffic allowed on the control network. With
additional Ethernet switches, it can provide protection against utilization failures and spanning
tree recalculations. This design can allow TDM connections to continue during specific network
failures. No host-based static routing required.

Disadvantages: - Requires additional VLANs and/or dedicated switches and router interfaces.

Example 6: Multi-site with a dedicated extended Layer 2 "control" network

This example shows the use of a single extended VLAN providing Layer 2 connectivity between
sites. This design provides all the benefits of design #5 and also addresses resiliency of the
enterprise network failing at Layer 3. It is at the enterprise’s discretion to route the traffic on the
extended control LAN to the enterprise network to provide access for administrative functions.
This design has been used successfully in several large-scale, Avaya IP-connected
deployments. It provides excellent reliability, especially when used with redundant network
equipment, but is expensive and some times impossible due to fiber-optic cable availability and
other network design consideration between the sites.

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Advantages: - Provides a control point to limit traffic allowed on the control network. With
additional switches, it can provide protection against switch failures and spanning tree
recalculations. This will allow TDM connections to continue during most network failures. No
host-based static routing required.

Disadvantages: - Requires additional dedicated switches, and a dedicated physical connection

infrastructure.

Example 7: Single-site, fiber-connected or IP-connected, with redundant control

interfaces
The fiber-connected (formally Multi-Connect offer) configuration had several choices for
reliability. Two offers provided redundant servers and interfaces on two private control networks.
Administrative control is provided by an interface directly on the enterprise (“public”) network, or
through properly administered C-LANs. For the purposes of this document, public network
refers to the routed enterprise network, and not necessarily networks capable of being routed
on the Internet.
The fiber-connected (formerly Multi-Connect) configurations are distinguished by the existence
of a non-IP bearer path between port networks as shown in the figure.

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 Combining fiber-connected and IP-connected port networks in a single configuration

Advantages: - Provides total isolation of the private control networks. This design allows TDM
connections to continue during any single control network component failure. No host-based
static routing is required.

Disadvantages: - Requires additional switches. It cannot extend across a routed infrastructure.

Control network on customer LAN (CNOCL)

Avaya Communication Manager 2.0 introduced the control network on Customer LAN option,
which allows the use of routed control networks. CNOCL removed many of the IP connectivity
differences between an IP-connected and fiber-connected (formally Multi-Connect), and leaves
the only true difference being the existence of inter-port network bearer paths. CNOCL provides
enterprises with several options to create and extend control networks

Example 8: Multi-site CNOCL using merged enterprise and control network

This example shows the connection of the two private control networks to the customers
enterprise network, making them public. They are designated public in this case because the IP
addressing of these control networks must be routable through the enterprise network.
This design has been used successfully in several Avaya deployments, but opens the control
networks to all network issues experienced in the enterprise. Firewalls or strong access lists
should be used to protect each site’s control network, but inter-site connectivity cannot truly be
protected. The use of the third interface connecting to the enterprise infrastructure for
management is no longer necessary, and can be collapsed on the one of the other two
networks.

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Advantages: - Provides a control point to limit traffic allowed on the control network. Uses the
enterprise’s existing network infrastructure.

Disadvantages: - This will not allow TDM connections to continue during most network failures.
Static routing is required on both Main and MBS/ESS servers, and may become complex,
depending on the network architecture. Changes in network architecture will have to be
synchronized with changes in the static route table, and will be service-affecting.

Example 9: Multi-site CNOCL using extended private networks

This example shows the connection of the two private control networks using a dedicated
routed infrastructure. They are designated private in this case because the IP addressing of
these control networks is not routable through the enterprise network.
This design provides for total protection of the control networks from any enterprise network
failures. With proper architecture, the static routing for CNA and CNB can be reduced to single
summary routes, rather than static routes per IPSI.
Example:
route 192.168.0.0 255.255.128.0 CNA
route 192.168.128.0 255.255.128.0 CNB

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 Combining fiber-connected and IP-connected port networks in a single configuration

Advantages: - The dedicated Control network provides total isolation from outages in the
enterprise network, so all TDM communication can remain active during total enterprise
network failure. The use of simple summary routes instead of possibly complex static routing
provides for a more reliable system. The synchronization of network changes with
Communication Manager can be logistically difficult.

Disadvantages: - Requires a dedicated infrastructure.

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114 Administration for Network Connectivity for Avaya Communication Manager

Chapter 3: Administering converged networks

This section provides information for administering converged network components.

● About Voice over IP converged networks
● Providing a network assessment
● Setting up VoIP hardware
● Administering Avaya gateways
● Administering IP trunks
- Administering H.323 trunks
- Administering SIP trunks
● Administering Avaya phones
- Administering IP Softphones
- Installing and administering Avaya IP telephones
● About hairpinning and shuffling

About Voice over IP converged networks

Until recently, voice, video, and data were delivered over separate, single-purpose networks. A
converged network brings voice, data, and video traffic together on a single IP network. Avaya’s
VoIP technology provides a cost-effective and flexible way of building enterprise
communications systems through a converged network.
Some of the flexible elements of a converged network include:
● Separation of call control and switching functions (see the Separation of Bearer and
Signaling Job Aid, 555-245-770, on the library CD, 555-233-825)
● Different techniques for handling data, voice, and FAX
● Communications standards and protocols for different network segments
● Constant and seamless reformatting of data for differing media streams
Digital data and voice communications superimposed in a converged network compete for the
network bandwidth, or the total information throughput that the network can deliver. Data traffic
tends to require significant network bandwidth for short periods of time, while voice traffic
demands a steady, relatively constant transmission path. Data traffic can tolerate delays, while
voice transmission degrades, if delayed. Data networks handle data flow effectively, but when
digitized voice signals are added to the mix, networks must be managed differently to ensure
constant, real-time transmission needed by voice.

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Providing a network assessment

Even if your network appears to perform acceptably, adding VoIP taxes network resources and
performance, because VoIP requires dedicated bandwidth and is more sensitive to network
problems than data applications alone. Many customer IP infrastructures appear to be stable
and perform at acceptable levels, but have performance and stability issues that create
problems for Avaya VoIP Solutions. While a customer network may appear to be ready to
support full-duplex VoIP applications, Avaya cannot assure performance and quality without a
network assessment.
The network assessment services for Avaya VoIP consist of 2 phases:
● Basic Network Assessment — is a high-level LAN/WAN infrastructure evaluation that
determines the suitability of an existing network for VoIP.
● Detailed Network Assessment — is typically the second phase in the Network Assessment
for IP Telephony solutions.
The detailed network assessment takes information gathered in the basic network
assessment, performs problem diagnosis, and provides functional requirements for the
network to implement Avaya VoIP.
For more information, see
● "Network assessment offer" in Avaya Application Solutions: IP Telephony Deployment
Guide, 555-245-600.
● Avaya Communication Solutions and Integration (CSI)
Avaya Communication Solutions and Integration (CSI) supports a portfolio of consulting
and engineering offers to help plan and design voice and data networks, including:
- IP Telephony
- Data Networking Services
- Network Security Services.
You can contact Avaya CSI:
- On the Web -- http://csi.avaya.com.
- by E-Mail: bcsius@avaya.com
- by phone: +1 866 282 9266
● http://netassess.avaya.com for a description of the Avaya network assessment policy.
Note: this link is available only from within the Avaya corporate network.

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 Setting up VoIP hardware

Setting up VoIP hardware

This section contains descriptions and administration information for the following circuit packs
and media modules:
● TN464HP/TN2464CP Universal DS1 circuit packs and MM710 T1/E1Media Module
● TN799DP Control LAN
● TN2302AP IP Media Processor
● TN2302AP IP Media Processor
● TN2602AP IP Media Resource 320
● TN2312BP IP Server Interface (IPSI)
● MM760 VoIP Media Module
● TN8400AP Media Server circuit pack
● TN8412AP S8400 server IP Interface

TN464HP/TN2464CP Universal DS1 circuit packs and

MM710 T1/E1Media Module
The TN464HP/TN2464CP circuit packs and the MM710 Media Module (version 3 and later)
have the same functionality as other DS1 circuit packs with the addition of echo cancellation
circuitry, which offers echo cancellation tail lengths of up to 96 milliseconds (ms). The TN574,
TN2313, and TN2464 DS1 circuit packs do not support echo cancellation.
The TN464HP/TN2464CP and MM710 are intended for users who encounter echo over circuits
connected to the Direct Distance Dialing (DDD) network. Echo is most likely to occur when
Avaya Communication Manager is configured for ATM, IP, and wideband. In addition, echo can
occur on system interfaces to local service providers that do not routinely install echo
cancellation equipment in all their circuits.
Echo cancellation is a software right-to-use feature that supports voice channels, and is not
intended for data. When a data call is received, these circuit packs detect a modem tone and
turn off echo cancellation for the duration of the data call.

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Working with echo cancellation

You can determine whether echo cancellation is enabled for TN464HP/TN2464CP circuit packs
and MM710 T1/E1 Media Modules by displaying the system-parameters customer-options
screen.
1. Type display system-parameters customer-options.
2. Find and review the following fields.
The fields may appear on different pages of the screen.

Field Conditions/Comments
Maximum Number of DS1 Boards Specifies the number of DS1
with Echo Cancellation boards that have echo cancellation
turned on.
DS1 Echo Cancellation If y, echo cancellation is enabled.

3. Exit the screen.

Administering echo cancellation on the DS1 circuit pack

or MM710 media module

Note:
Note: Any changes made to the echo cancellation settings on the DS1 Circuit Pack
screen take effect immediately.
The DS1 Circuit Pack screen for the TN464HP/TN2464CP circuit packs and MM710 media
module has fields to support echo cancellation: Echo Cancellation, EC Direction, and EC
Configuration. The Echo Cancellation field appears when the Echo Cancellation feature is
activated on the System-Parameters Customer Options screen. The EC Direction and EC
Configuration fields appear when the DS1 Echo Cancellation field is enabled.
● EC Direction determines the direction from which echo will be eliminated, ether inward or
outward.
● EC Configuration is the set of parameters used when cancelling echo.
This information is stored in firmware on the UDS1 circuit pack.

To administer the DS1 circuit pack and MM710 media module

1. Type add ds1 <port> and press Enter to open the DS1 Circuit Pack screen,
where <port> is the location of the DS1 circuit pack, or the MM710 media module.

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DS1 Circuit Pack screen

add ds1 01c04 Page 1 of 1
DS1 CIRCUIT PACK

Location: 01C04 Name: _________

Bit Rate: _____ Line Coding: ____

Signaling Mode: isdn-pri__

Connect: _________ Interface: ___________
TN-C7 Long Timers? Country Protocol: ____
Interworking Message: Protocol Version: _
Interface Companding: ____
Idle Code: ________ CRC? _
DCP/Analog Bearer Capability: ________

T303 Timer (sec): ___

Slip Detection? _ Near-end CSU Type: ________

E1 Sync-Splitter? _
Echo Cancellation? _
EC Direction: _
EC Configuration: _

2. On the DS1 Circuit Pack screen, complete the following fields:

Field Conditions/Comments

Echo Enter y to enable echo cancellation on the Universal DS-1

Cancellation circuit pack.
EC Direction Indicates the direction of the echo that is being cancelled.
Enter inward or outward.
● The inward setting cancels echo energy coming
back into the switch — energy from an outgoing call
is reflected from an external reflection point (party
"inside" the switch hears the echo).
● The outward setting cancels echo energy going
outside the switch — energy from an incoming call is
reflected from an internal reflection point (party
"outside" the switch hears the echo).

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Field Conditions/Comments

EC Indicates the set of echo cancellation defaults to administer.

Configuration Appears when the Echo Cancellation field is set to y.
Enter digits between 1-15.
● Enter 1 or 5-15 to provide most rapid adaptation in
detecting and correcting echo at the beginning of a
call, regardless of the loudness of the talker’s voice.
For very loud talkers and severe echo, the far-end
talker’s speech is heard as clipped when both parties
talk at the same time.
● Enter 2 for slightly slower adaptation to echo, use if
speech is often clipped when both parties talk at the
same time.
● Enter 3 for slightly slower adaptation to echo, may
result in a 2 or 3 second fade on strong echo for quiet
talkers. Completely removes speech clipping.
● Enter 4 in cases of extreme echo, excessive clipping
or breakup of speech. May result in slight echo or
background noise.
Note:
Note: For the MM710, the values 1 and 4 are
reversed. That is, 1 for the MM710 is the
same as 4 for the TN464HP/TN2464CP,
and 4 for the MM710 is the same as 1 for
the TN464HP/TN2464CP

Administering echo cancellation on trunks

Note:
Note: Changes to echo cancellation settings on the Trunk Features screen do not take
effect until after a port or trunk group is busied-out/released, or the SAT
command test trunk group is performed, or periodic maintenance is run.
Echo cancellation is turned on or off on a per trunk-group basis using the change
trunk-group command. If the trunk group field, DS1 Echo Cancellation is y, echo
cancellation is applied to every TN464HP/TN2464CP trunk member in that trunk group. The
echo cancellation parameters used for a given trunk member are determined by the EC
Configuration number administered on the DS1 Circuit Pack screen for that specific trunk’s
board.

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Echo cancellation applies to voice channels and supports echo cancellation on the following
trunk group types:
● CO
● TIE
● ISDN-PRI
● FX
● WATS
● DID
● DIOD
● DMI-BOS
● Tandem
● Access
● APLT
Administration of echo cancellation on a trunk group is done on the TRUNK FEATURES
screen.

To administer a trunk group for echo cancellation

1. Type change trunk-group n
where n is the trunk group number.
2. Go to the Trunk Features page. Note: the fields displayed depend on the trunk group type.
Trunk Features screen
change trunk-group n Page 3 of x
TRUNK FEATURES
ACA Assignment? _ Measured: ____
Maintenance Tests? _
Data Restriction? _

Abandoned Call Search? _

Suppress # Outpulsing? _

Charge Conversion: _____

Decimal Point: ______
Currency Symbol: ___
Charge Type: _______ ________
Per Call CPN Blocking Code: ___
Per Call CPN Unblocking Code: ___
MF Tariff Free? _
Outgoing ANI: DS1 Echo Cancellation? _

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3. Move to the following field

Field Conditions/Comments
DS1 Echo Enter y to enable echo cancellation on a per trunk
Cancellation group basis.

4. Save the changes.

TN799DP Control LAN

Systems in a private network are interconnected by both tie trunks (for voice communications)
and data links (for control and transparent feature information). Various DS1, IP, and analog
trunk circuit packs provide the voice-communications interface. For TCP/IP connectivity, the
data-link interface is provided by a TN799DP Control LAN (C-LAN) circuit pack. (For more
information about this VoIP transmission hardware, see TN799DP control LAN (C-LAN)
interface on page 18 in the Network quality management section of the Networking overview
chapter.)
The C-LAN handles the data-link signaling information in one of two configurations: Ethernet, or
point-to-point (PPP). The C-LAN circuit pack has one 10/100baseT ethernet connection and up
to 16 DS0 physical interfaces for PPP connections. C-LAN also extends ISDN capabilities to csi
models by providing packet-bus access.
● In the Ethernet configuration, the C-LAN passes the signaling information over a separate
TCP/IP network, usually by means of a hub or Ethernet switch.
Avaya recommends an Ethernet switch for optimal performance. For this configuration,
install the C-LAN circuit pack and connect the appropriate pins of the C-LAN I/O field to the
hub or Ethernet switch.
● In the PPP configuration, the C-LAN passes the data-link signaling to the DS1 for inclusion
in the same DS1 bit stream as the DCS voice transmissions.
For this configuration, install the C-LAN circuit pack; no other connections are needed. The
appropriate DS1 circuit packs must be installed, if they are not already present.

Physical addressing for the C-LAN board

The Address Resolution Protocol (ARP) on the C-LAN circuit pack relates the 32-bit IP address
configured in software to the 48-bit MAC address of the C-LAN circuit pack. The MAC address
is burned into the board at the factory. The C-LAN board has an ARP table that contains the IP
addresses associated with each hardware address. This table is used to route messages
across the network. Each C-LAN board has one MAC address, one Ethernet address, and up to
16 PPP addresses.

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IP addressing techniques for the C-LAN board

The C-LAN supports both Classless Inter-domain Routing and Variable-Length Subnet Masks.
These addressing techniques provide greater flexibility in addressing and routing than class
addressing alone.

Installing the TN799DP C-LAN

TCP/IP connections (Ethernet or PPP) require a TN799DP C-LAN circuit pack, unless your
system has embedded Ethernet capabilities. Before you install the C-LAN circuit pack, be sure
you understand the requirements of your LAN. For information about LAN requirements for
VoIP, go to http://www.extremenetworks.com/LIBRARIES/Avaya/
AvayaIPvoiceQualityNetworkRequirements.pdf and look in the white paper titled Avaya IP Voice
Quality Network Requirements (EF-LB1500).
The following steps describe installation for the TN799DP C-LAN.
1. Determine the carrier/slot assignments of the circuit packs to be added.
You can insert the C-LAN circuit pack into any port slot.
2. Insert the circuit packs into the slots specified in step 1.
Note:
Note: You do not need to power down the cabinet to install a C-LAN circuit pack.

Administering the C-LAN bus bridge (Avaya DEFINITY Server csi only)
For the Avaya DEFINITY Server csi only, complete the following steps to administer the bus
bridge for the C-LAN circuit pack. Only an Avaya representative using the craft or higher login
can change the maintenance parameters.
Note:
Note: If there are 2 C-LAN circuit packs installed in this csi switch, administer the bus
bridge for only one of them.

To administer the C-LAN bus bridge (Avaya DEFINITY Server csi only)
1. Type change system-parameters maintenance.
2. Move to the Packet Intf2 field and enter y.
3. Enter the location of the C-LAN circuit pack in the Bus Bridge field
(for example, 01a08 for cabinet 1, carrier A, and slot 8).
4. Enter the port bandwidths or use the defaults in the Pt0, Pt1, and Pt2 Inter-Board Link
Timeslots fields.
5. Submit the screen.

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6. Verify that the bus bridge LED is lit on the C-LAN circuit pack.
This indicates that the packet bus is enabled.

Testing the packet bus and C-LAN circuit pack

In order to test the packet bus and the TN799DP C-LAN circuit pack, the cabinet needs an
installed TN771D Maintenance/Test circuit pack.

To test the packet bus and C-LAN circuit pack

1. If there is no TN771D circuit pack in the cabinet, place one in a port slot.
This is for testing purposes only, and you will remove the board when finished.
2. Enter test pkt port-network 1 long
For more information about these tests, refer to the test pkt command section in
Maintenance Commands for Avaya Communication Manager 2.1, Media Gateways and
Servers, 03-300191.
3. If the TN771D circuit pack was already in the cabinet, leave it there.
4. If you added the TN771D circuit pack to the cabinet in order to test the TN799DP circuit
pack, remove it from the cabinet.

Installing C-LAN cables to a hub or ethernet switch

In the Ethernet configuration, the C-LAN passes the signaling information over a separate TCP/
IP network, usually by means of a hub or Ethernet switch. Connect the appropriate pins of the
C-LAN I/O field to the hub or Ethernet switch.
See Figure 26: Cable connection for C-LAN connectivity.
1. Connect the 259A connector to the backplane connector of the port slot containing the
C-LAN circuit pack.
2. Connect the Category 5 UTP cable between the 259A connector and a hub or Ethernet
switch.
This connects port 17 on the C-LAN circuit pack to the LAN.

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Figure 26: Cable connection for C-LAN connectivity

3
cydflan2 EWS 101398

Figure notes:

1. 259A Connector 3. Ethernet switch

2. Category 5 UTP Cable (max length 100m)

Assigning IP node names

You must assigns node names and IP addresses to each node in the network. Administer the IP
Node Names screen on each call server or switch in the network.
You should assign the node names and IP addresses logically and consistently across the
entire network. These names and addresses should be assigned in the planning stages of the
network and should be available from the customer system administrator or from an Avaya
representative.

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To assign IP node names:

1. Type change node-names ip and press Enter to open the IP Node Names screen.

change node-names ip Page 1

IP NODE NAMES

Name IP Address
default___________ 0__.0__.0__.0__
node-1____________ 192.168.10_.31_
node-2____________ 192.168.10_.32_
__________________ ___.___.___.___

2. Enter values.

Field Conditions/Comments
Name Enter unique node names for each switch or adjunct that
will connect to this switch through the C-LAN board.
IP Address The unique IP addresses of the nodes named in the
previous field.

3. Submit the screen.

Defining a LAN default gateway

On LANs that connect to other networks or subnetworks, Avaya recommends that you define a
default gateway. The default gateway node is a routing device that is connected to different
(sub)networks. Any packets addressed to a different (sub)network, and for which no explicit IP
route is defined, are sent to the default gateway node.
You must use the IP Interfaces screen to administer a node (C-LAN port, PROCR or IP
Interface port) as the default gateway.
The default node on the Node Names screen is a display-only entry with IP address 0.0.0.0. It
acts as a variable that takes on unknown addresses as values. When the “default” IP route is
set up, any address not known by the C-LAN is substituted for the default address in the default
IP route, which uses the router as the default gateway.

Setting up Alternate Gatekeeper and

C-LAN load balancing
Alternate Gatekeeper gives IP endpoints a list of available C-LAN circuit packs. Alternate
Gatekeeper addresses and C-LAN load-balancing spread IP endpoint registration across more
than one C-LAN circuit pack. The C-LAN load-balancing algorithm allocates endpoint
registrations within a network region to the C-LAN with the least number of sockets in use. This
increases system performance and reliability.

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If registration with the original C-LAN circuit pack IP address is successful, the software sends
back the IP addresses of all the C-LAN circuit packs in the same network region as the IP
endpoint. If the network connection to one C-LAN circuit pack fails, the IP endpoint re-registers
with a different C-LAN. If the system uses network regions based on IP address, the software
also sends the IP addresses of C-LANs in interconnected regions. These alternate C-LAN
addresses are also called gatekeeper addresses. These addresses can also be used if the data
network carrying the call signaling from the original C-LAN circuit pack fails.
IP Telephones can be programmed to search for a gatekeeper independently of load-balancing.
The IP Telephone accepts gatekeeper addresses in the message from the Dynamic Host
Configuration Protocol (DHCP) server or in the script downloaded from the Trivial File Transfer
Protocol (TFTP) server. If the phone cannot contact the first gatekeeper address, it uses an
alternate address. If the extension and password is rejected by the first gatekeeper, the IP
Telephone contacts the next gatekeeper. The number of gatekeeper addresses the phone
accepts depends on the length of the addresses administered on the DHCP server.
Note:
Note: A single Alternate Gatekeeper list is typically used in configurations with multiple
media servers. In this case, the DHCP server sends the same Alternate
Gatekeeper list to all IP endpoints, but a given IP endpoint may not be able to
register with some of the gatekeepers in the list and a registration attempt to
those gatekeepers will be rejected.
C-LAN load balancing and alternate gatekeeper addresses require IP stations that accept
multiple IP addresses, such as:
● IP telephone
● IP Softphone
● Avaya IP Agent

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Endpoint capabilities

Table 6: Endpoint capabilities

Endpoint Number of How set

Gatekeepers

IP Telephone 1 Default - DNS name AvayaCallServer, or manually,

one fixed IP address

8 Through DHCP - DNS names or fixed IP addresses.

DHCP limits all options to a total of 255 bytes.

Through TFTP - DNS names or fixed IP addresses.

10 TFTP overwrites any gatekeepers provided by DHCP

Fixed IP addresses from Communication Manager.

Communication Manager 2.0 and later supersedes
30 any gatekeeper address provided previously.
IP Softphone 30 Manually through options or properties of the
R5 IP Softphone after it is installed.
IP Agent R3 30 Manually through options or properties of the IP agent
after it is installed, or from Communication Manager.

Note:
Note: DHCP servers send a list of alternate gatekeeper and C-LAN addresses to the IP
Telephone endpoint. It is possible for a hacker to issue a false request and
thereby obtain IP addresses from the DHCP server.However, the alternate
gatekeeper IP addresses will only be sent to an endpoint that successfully
registers.

TN2302AP IP Media Processor

Use the TN2302AP IP Media Processor to transmit voice and FAX data (non-DCS signaling)
over IP connections, and for H.323 multimedia applications in H.323 V2 compliant endpoints.
The TN2302AP IP Media Processor provides port network connectivity for an IP-connected
configuration. The TN2302AP IP Media Processor includes a 10/100BaseT Ethernet interface
to support H.323 endpoints for IP trunks and H.323 endpoints, and its design improves voice
quality through its dynamic jitter buffers.
The TN2302AP IP Media Processor additionally performs the functions:
● Echo cancellation
● Silence suppression

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● DTMF detection
● Conferencing
It supports the following codecs, FAX detection for them, and conversion between them:
● G.711 (mu-law or a-law, 64Kbps)
● G.723.1 (6.3Kbps or 5.3Kbps audio)
● G.729 (8Kbps audio)

Improving theTN2302AP transmission interface

The TN2302AP IP Media Processor provides improved voice quality through its dynamic jitter
buffers. The TN2302AP’s digital signal processors (DSPs), by default, insert 5.0 dB of loss in
the signal from the IP endpoints, and insert 5.0 dB of gain in the signal to the IP endpoints.
System administrators can administer loss/gain, based on country code on the
terminal-parameters screen.

Supporting TN2302AP hairpinning

The TN2302AP IP Media Processor supports 64 ports of shallow hairpin. IP packets that do not
require speech codec transcoding can be looped back at the UDP/IP layers with a simple
change of addressing. This reduces delay and leaves DSP resources available.

Testing TN2302AP ports

The TN2302AP IP Media Processor is a service circuit pack, not a trunk circuit pack. Therefore,
an H.323 tie trunk cannot be used for facility test calls. Use the ping command to test the
TN2302AP ports.

Enabling a survivable remote EPN

Any survivable remote EPN containing a C-LAN board and H.323 station sets should also
contain a TN2302AP IP Media Processor.

TN2602AP IP Media Resource 320

The TN2602AP IP Media Resource 320 provides high-capacity voice over Internet protocol
(VoIP) audio access to the switch for local stations and outside trunks. The IP Media Resource
320 provides audio processing for the following types of calls:
● TDM-to-IP and IP-to-TDM
● IP-to-IP

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The TN2602AP IP Media Resource 320 circuit pack has two capacity options, both of which are
determined by the license file installed on Communication Manager:
● 320 voice channels, considered the standard IP Media Resource 320
● 80 voice channels, considered the low-density IP Media Resource 320
Only two TN2602AP circuit packs are allowed per port network.
Note:
Note: The TN2602AP IP Media Resource 320 is not supported in CMC1 and G600
Media Gateways.

Load balancing
Up to two TN2602AP circuit packs can be installed in a single port network for load balancing
The TN2602AP circuit pack is also compatible with and can share load balancing with the
TN2302 and TN802B IP Media Processor circuit packs. Actual capacity may be affected by a
variety of factors, including the codec used for a call and fax support.
Note:
Note: When two TN2602AP circuit packs, each with 320 voice channels, are used for
load balancing within a port network, the total number of voice channels available
is 484, because 484 is the maximum number of time slots available for a port
network.

Bearer duplication
Two TN2602AP circuit packs can be installed in a single port network (PN) for duplication of the
bearer network. In this configuration, one TN2602AP is an active IP media processor and one is
a standby IP media processor. If the active media processor, or connections to it, fail, active
connections failover to the standby media processor and remain active. This duplication
prevents active calls in progress from being dropped in case of failure. The interchange
between duplicated circuit packs affects only the PN in which the circuit packs reside.
Note:
Note: The 4606, 4612, and 4624 IP telephones do not support the bearer duplication
feature of the TN2602AP circuit pack. If these telephones are used while an
interchange from the active to the standby media processor is in process, then
calls might be dropped.

Virtual IP and MAC addresses to enable bearer duplication

Duplicated TN2602AP circuit packs in a PN share a virtual IP and virtual MAC address. These
virtual addresses are owned by the currently-active TN2602. In addition to the virtual IP
address, each TN2602 has a "real" IP address. All bearer packets sent to a PN that contains
duplicated TN2602AP circuit packs, regardless of whether the packets originate from TN2602s

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in other PNs or from IP phones or gateways, are sent to the virtual IP address of the TN2602
pair in that PN. Whichever TN2602AP circuit pack is active is the recipient of those packets.
When failover to the standby TN2602 occurs, a negotiation between TN2602s to determine
which TN2602 is active and which is standby takes place. State-of-health, call state, and
encryption information is shared between TN2602s during this negotiation. The newly-active
TN2602AP circuit pack sends a gratuitous address resolution protocol (ARP) request to ensure
that the LAN infrastructure is updated appropriately with the location of the active TN2602.
Other devices within the LAN will update their old mapping in ARP cache with this new
mapping.

Requirements for bearer duplication

The Communication Manager license file must have entries for each circuit pack, with the
entries having identical voice channels enabled. In addition, both circuit packs must have the
latest firmware that supports bearer duplication.
Duplicated TN2602AP circuit packs must be in the same subnet. In addition, the Ethernet
switch or switches that the circuit packs connect to must also be in the same subnet. This
shared subnet allows the Ethernet switches to use signals from the TN2602AP firmware to
identify the MAC address of the active circuit pack. This identification process provides a
consistent virtual interface for calls.

Combining duplication and load balancing

A single port network can up to two TN2602AP circuit packs only. As result, the port network
can have either two duplicated TN2602AP circuit packs or two load balancing TN2602AP circuit
packs, but not both a duplicated pair and a load-balancing pair. However, in a Communication
Manager configuration, some port networks can have a duplicated pair of TN2602AP circuit
packs and other port networks can have a load-balancing pair of TN2602AP circuit packs.
Some port networks can also have single or no TN2602AP circuit packs.
Note:
Note: If a pair of TN2602AP circuit packs previously used for load balancing are
re-administered to be used for bearer duplication, only the voice channels of
whichever circuit pack is active can be used. For example, If you have two
TN2602 AP circuit packs in a load balancing configuration, each with 80 voice
channels, and you re-administer the circuit packs to be in bearer duplication
mode, you will have 80 (not 160) channels available. If you have two TN2602 AP
circuit packs in a load balancing configuration, each with 320 voice channels, and
you re-administer the circuit packs to be in bearer duplication mode, you will have
320 (rather than 484) channels available.

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Features
The IP Media Resource 320 supports hairpin connections and the shuffling of calls between
TDM connections and IP-to-IP direct connections. The IP Media Resource 320 can also
perform the following functions:
● Echo cancellation
● Silence suppression
● Adaptive jitter buffer (320 ms)
● Dual-tone multifrequency (DTMF) detection
● AEA Version 2 and AES media encryption
● Conferencing
● QOS tagging mechanisms in layer 2 and 3 switching (Diff Serv Code Point [DSCP] and
802.1pQ layer 2 QoS)
● RSVP protocol
The TN2602AP IP Media Resource 320 circuit pack supports the following codecs for voice,
conversion between codecs, and fax detection:
● G.711, A-law or Mu-law, 64 kbps
● G.726A-32 kbps
● G.729 A/AB, 8 kbps audio
The TN2602AP also supports transport of the following devices:
- Fax, Teletypewriter device (TTY), and modem calls using pass-through mode
- Fax, V.32 modem, and TTY calls using proprietary relay mode
Note:
Note: V.32 modem relay is needed primarily for secure SCIP telephones (formerly
known as Future Narrowband Digital Terminal (FNBDT) telephones) and STE
BRI telephones.
- T.38 fax over the Internet, including endpoints connected to non-Avaya systems
- 64-kbps clear channel transport in support of firmware downloads, BRI secure
telephones, and data appliances

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Firmware download
The IP Media Resource 320 can serve as an FTP or SFTP server for firmware downloads to
itself. However, this capability is activated by and available for authorized services personnel
only.
As with the TN2302AP IP Media Processor, firmware upgrades of the TN2602AP circuit pack,
are not call preserving. However, by using the campon-busyout media-processor
command, a single or load-balanced TN2602AP circuit pack can be busied out without dropping
calls, and then upgraded. In addition, with duplicated TN2602AP circuit packs, the standby
TN2602AP circuit pack can be upgraded first, and then the circuit packs interchanged. The
active circuit pack becomes the standby and can then be busied out and upgraded without
dropping calls.

I/O adapter
The TN2602AP IP Media Resource 320 circuit pack has a services Ethernet port in the
faceplate. The TN2602AP circuit pack also requires an input/output adapter that provides for
one RS-232 serial port and two 10/100 Mbs Ethernet ports for LAN connections (though only
the first Ethernet port is used). This Ethernet connection is made at the back of the IP Media
Resource 320 slot.
Note:
Note: The TN2302AP IP Media Processor on page 128 can also use this I/O adapter.

TN2312BP IP Server Interface (IPSI)

In configurations with the S8700 Media Server controlling media gateways, the bearer paths
and the control paths are separate. Control information for port networks (PNs) travels over a
LAN through the Ethernet switch. The control information terminates on the S8700 Media
Server at one end and on a TN2312BP IP Server Interface (IPSI) on the other end. Each IPSI
may control up to five port networks by tunneling control messages over the Center-Stage or
ATM network to PNs that do not have IPSIs.
Note:
Note: IPSIs cannot be placed in a PN that has a Stratum-3 clock interface. Also, IPSIs
cannot be placed in a remote PN that is using a DS1 converter.
In configurations that use a dedicated LAN for the control path, IPSI IP addresses are typically
assigned automatically using DHCP service from the S8700. Also, a dedicated IPSI Ethernet
connection to a laptop can be used to assign static IP addresses or for maintenance. In
configurations using the customer’s LAN, only static addressing is supported.
Consult the Avaya S8300, S8500, and S8700 Media Server Library CD (555-233-825) for
information on installing and upgrading S8700 and IPSI configurations.

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MM760 VoIP Media Module

The Avaya MM760 Media Module is a clone of the motherboard VoIP engine.The MM760
provides the audio bearer channels for voice over IP calls, and is under control of the G700.
Based on system administration of audio codecs, a MM760 can handle either 64 or 32
simultaneous channels of H.323 audio processing. If the IP Parameters screen specifies only
G.711 mu-law or G.711 a-law as the audio codecs, the MM760 can service 64 channels. If any
other codec type (G.723-5.3K, G.723-6.3K, or G.729) is administered, the MM760 can only
service 32 channels. These call types can be mixed on the same resource. In other words, the
simultaneous call capacity of the resource is 64 G.711 Equivalent Calls.
Note:
Note: Customers who want an essentially non-blocking system must add an additional
MM760 Media Module, if they use more than two MM710 Media Modules in a
single chassis. The additional MM760 provides an additional 64 channels. The
MM760 is not supported on the G350 and G250 Media Gateways.

What is the MM760 Ethernet interface

The MM760 must have its own Ethernet address. The MM760 requires a 10/100 Base T
Ethernet interface to support H.323 endpoints for Avaya IP trunks and stations from another
G700 Media Gateway. The MM760 is not supported in the Avaya G350 Media Gateway.

Supporting voice compression on the MM760

The MM760 supports on-board resources for compression and decompression of voice for
G.711 (A- and µ-law), G.729 and 729B, and G.723 (5.3K and 6.3K). The VoIP engine supports
the following functionality:
● RTP and RTCP interfaces
● Dynamic jitter buffers
● DTMF detection
● Hybrid echo cancellation
● Silence suppression
● Comfort noise generation
● Packet loss concealment
The MM760 also supports transport of the following:
● Teletypewriter device (TTY) tone relay over the Internet
● Faxes over a corporate IP intranet

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Note:
Note: The path between endpoints for FAX transmissions must use Avaya telecommunications
and networking equipment.

! SECURITY ALERT:
SECURITY ALERT: Faxes sent to non-Avaya endpoints cannot be encrypted.
● Modem tones over a corporate IP intranet
Note:
Note: The path between endpoints for modem tone transmissions must use Avaya
telecommunications and networking equipment.

TN8400AP Media Server circuit pack

The TN8400 Media Server circuit pack is the platform for the Avaya S8400 Media Server, which
is a Linux-based server that occupies a single slot on a standard TN carrier. The S8400 Media
Server efficiently provides the Avaya Communication Manager processing functions in
stand-alone, single port network telephony systems requiring up to 500 stations.
For more information on the Avaya S8400 Media Server and TN8400AP Media Server circuit
pack, see the section on “Linux-based media servers” in the Hardware Description and
Reference for Avaya Communication Manager (555-245-207). For more information about
administering the S8400 Media Server and TN8400 circuit pack, see Installing and Configuring
the Avaya S8400 Media Server, 03-300678, at http://www.avaya.com/support.

TN8412AP S8400 server IP Interface

The TN8412AP S8400 server IP interface (SIPI) is used in an S8400-based system. It provides
transport of control messages between the S8400 Media Server and the media server’s port
network (PN) using direct connections. (Connections using the customer’s LAN and WAN are
possible but not typical.) Through these control messages, the media server controls the PN.
The SIPI always resides in the tone clock slot on a media gateway and uses an Ethernet
interface to connect to:
● The S8400 server
● A laptop computer connected to the server through a services port
The SIPI provides the following functions:
● PN clock generation and synchronization for Stratum 4 type II only
● PN tone generation
● PN tone detection, global call classification, and international protocols
● Environmental maintenance

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The SIPI can be accessed remotely using the Telnet and SSH protocols. The SIPI can serve as
an SSH client, as well, for remote access from the SIPI to the Communication Manager server.
The C-LAN can also serve as an FTP or SFTP server for file transfers and firmware downloads.
Note:
Note: The SIPI cannot serve as an SFTP client. Additionally, the SSH/SFTP capability
is only for the control network interface, not the Services interface.
The SIPI supports the following functions and devices:
● Eight global call classification ports
● Network diagnostics
● Download of SIPI firmware updates using Communication Manager Web pages, the
loadipsi command from the server’s Linux command line, or the Software Update
Manager.
The TN8412AP SIPI is compatible with the S8400 media server and the G650 gateway. It is
also compatible with the G600 and CMC1 gateways in migration systems.
Note:
Note: An S8400 system is shipped with a TN8412AP SIPI circuit pack. However, the
TN2312BP IPSI circuit pack is also compatible with S8400 systems.
For more information on the S8400 Media Server and TN8412 circuit pack, see the section on
“Linux-based media servers” in the Hardware Description and Reference for Avaya
Communication Manager (555-245-207). For more information about administering the TN8412
circuit pack, see Installing and Configuring the Avaya S8400 Media Server, 03-300678, at
http://www.avaya.com/support.

Administering Avaya gateways

The following documents additional information about the administration of the Avaya
gateways:
● Administrator Guide for Avaya Communication Manager (03-300509).
● Upgrading, Migrating, and Converting Media Servers and Media Gateways, 03-300412.

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 Administering IP trunks

Administering IP trunks
The following sections describe the administration of IP trunks:
● Administering SIP trunks
● Administering H.323 trunks

Administering SIP trunks

SIP is the Session Initiation Protocol, an endpoint-oriented messaging standard defined by the
Internet Engineering Task Force (IETF). As implemented by Avaya for release 2.0 and later of
Communication Manager, SIP "trunking" functionality is available on any of the Linux-based
media servers (S8300, S8500 or S8700-series). These media servers function as Plain Old
Telephone Service (POTS) gateways, and they also support name/number delivery between
and among the various non-SIP endpoints supported by Communication Manager (analog,
DCP or H.323 stations and analog, digital or IP trunks), and SIP-enabled endpoints, such as the
Avaya 4600-series SIP Telephones. In addition to its calling capabilities, IP Softphone R5 and
later also includes optional instant-messaging client software, which is a SIP-enabled
application, while continuing its full support of the existing H.323 standard for call control. Avaya
SIP Softphone R2 and later releases fully support SIP for voice call control, as well as instant
messaging and presence.
For more information on SIP trunk administration and usage, see SIP Support in Avaya
Communication Manager, 555-245-206, and for information on proxy and registrar functions on
the SIP server, see Installing and Administering SIP Enablement Services (03-600768).

Administering H.323 trunks

H.323 trunks use an ITU-T IP standard for LAN-based multimedia telephone systems.
IP-connected trunks allow trunk groups to be defined as ISDN-PRI-equivalent tie lines between
switches over an IP network.
The TN2302AP or TN2602AP enables H.323 trunk service using IP connectivity between an
Avaya IP solution and another H.323 v2-compliant endpoint.
H.323 trunk groups can be configured as:
● Tie trunks supporting ISDN trunk features such as DCS+ and QSIG
● Generic tie-trunks permitting interconnection with other vendors’ H.323 v2-compliant
switches
● Direct-inward-dial (DID) type public trunks, providing access to the switch for unregistered
users

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Setting up H.323 trunks for administration

This section describes the preliminary administration steps needed to set up H.323 trunks.
Before you can administer an H.323 trunk, perform the following tasks:
● Verifying customer options for H.323 trunking
● Administering C-LAN and IP Media Processor circuit packs (S8500/S8700-series)
Note:
Note: These circuit packs are not required if your system has built-in Ethernet
capabilities (S8300).
● Administering QoS parameters
● Assigning IP node names and IP addresses
● Defining IP interfaces (C-LAN, TN2302AP, or TN2602AP Load Balanced)
● Assigning link through Ethernet data module (S8500/S8700-series)
● Implementing Best Service Routing (optional)

Verifying customer options for H.323 trunking

Verify that H.323 trunking is set up correctly on the system-parameters customer-options
screen. If any changes need to be made to fields on this screen, call your Avaya representative
for more information.
To verify customer options for H.323 trunking:
1. Type display system-parameters customer-options, and go to the Optional
Features screen.
2. Verify that the following fields have been completed on pages 1 and 2 of this screen:

Field Conditions/Comments
G3 Version This value should reflect the current version
of Avaya Communication Manager.
Maximum Administered Number of trunks purchased. Value must be
H.323 Trunks greater than 0. On Page 2 of the screen.
Maximum Administered Number of remote office trunks purchased.
Remote Office Trunks This is also located on page 2 of the screen.

3. Go to the page that displays the IP trunks and ISDN-PRI fields.

4. Verify that IP Trunks and ISDN-PRI are enabled.
If not, you need to obtain a new license file.

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Administering C-LAN and IP Media Processor circuit packs (S8500/S8700-series)

To administer the C-LAN and IP Media Processor circuit packs:
1. Type change circuit-packs to open the Circuit Packs screen.
Circuit Packs screen
Page 2 of 5

Circuit Packs

Cabinet 1 Carrier: B
Carrier Type: port

Slot Code SF Mode Name Slot Code SF Mode Name

00 TN799 C C-LAN
01 TN2302 AP IP Media Processor
02
03
04

2. To administer a C-LAN circuit pack, complete the following fields:

Fields for C-LAN Conditions/Comments

Code TN799DP
Name C-LAN (displays automatically)

3. To administer an IP Media Processor, complete the following fields:

Fields for IP Media Conditions/Comments

Code TN2302AP or TN2602AP
Name IP Media Processor (displays
automatically)

4. Submit the screen.

Administering QoS parameters

Four parameters on the IP-Options System-Parameters screen determine threshold Quality of
Service (QoS) values for network performance. You can use the default values for these
parameters, or you can change them to fit the needs of your network. (See Setting network
performance thresholds).
Administer additional QoS parameters, including defining IP Network Regions and specifying
the codec type to be used. See Chapter 4: Network quality administration.

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Assigning IP node names and IP addresses

Communication Manager uses node names to reference IP addresses throughout the system.
Use the IP Node Names screen to assign node names and IP addresses to each node in the
network with which this switch communicates through IP connections. The Node Names
screen must be administered on each node in an IP network.
A node can be:
● C-LAN Ethernet or PPP port
● Bridge or router
● CMS Ethernet port
● INTUITY AUDIX
Enter the AUDIX name and IP address on the AUDIX Node Names screen. Enter data for all
other node types on the IP Node Names screen.
For H.323 connections, each MedPro Ethernet port (IP interface) on the local switch must also
be assigned a node name and IP address on the IP Node Names screen.
Assign the node names and IP addresses in the network in a logical and consistent manner
from the point of view of the whole network. Assign the names and addresses in the planning
stages of the network and should be available from the customer system administrator or from
an Avaya representative.
To assign IP Node Names:
1. Type change node-names ip to open the IP Node Names screen.
IP Node Names screen
change node-names ip Page 2 of 6

IP NODE NAMES

Name IP Address
clan-a1 192.168.10.31
clan-a2 192.168.20.31
default 0 .0 .0 .0
medpro-a1 192.168.10.81
medpro-a2 192.168.10.80
medpro-a3 192.168.10.82
medpro-b1 192.168.10.83

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2. Move to the fields below and complete them as follows:

Field Conditions/Comments
Name Enter unique node names for:
● Each C-LAN Ethernet port on the network
● Each IP Media Processor
● Each Remote Office
● Other IP gateways, hops, etc.
The default node name and IP address is used to set up a
default gateway, if desired. This entry is automatically present on
the Node Names screen and cannot be removed.
When the Node Names screen is saved, the system
automatically alphabetizes the entries by node name.
IP Address Enter unique IP addresses for each node name.

3. Submit the screen.

Defining IP interfaces (C-LAN, TN2302AP, or TN2602AP Load Balanced)

The IP interface for each C-LAN, TN2302AP Media Processor, or TN2602AP (load-balanced)
circuit pack on the switch must be defined on the IP Interfaces screen. Each switch in an IP
network has one IP Interfaces screen.
To define IP interfaces for each C-LAN and Media Processor circuit pack:
1. Type add ip-interface CCccss or procr to open the IP Interfaces screen.
Note:
Note: This screen shows the display for the S8500/S8700 media servers.

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IP Interfaces screen
add ip-interface 01a08 Page 1 of x
IP INTERFACES

Type: CLAN
Slot: 01A08
Code/Suffix: TN799
Node Name: makita-clan1
IP Address: 172.28.5.254
Subnet Mask: 255.255.255.0 Link?
Gateway Address:
Enable Ethernet Port? y Allow H.323 Endpoints?
Network Region: 20 Allow H.248 Gateways?
VLAN: n Gatekeeper Priority?

Target socket load and Warning level: 400

Receive Buffer TCP Window Size:

ETHERNET OPTIONS
Auto? n
Speed:100Mbps
Duplex: Full

2. Complete the following fields as shown:

Field Conditions/Comments
Critical Reliable Appears only for the TN2602AP. Type n when the
Bearer TN2602AP is in load balancing mode or is the only
TN2602AP circuit pack in the port network.
Type Display only. This field is automatically populated with
C-LAN, MEDPRO, or PROCR. The fields differ on the
screens for each of the IP Interface types. Required entries
may also differ for Processor Ethernet (PE). See the Screen
Reference chapter of the Administrator Guide for Avaya
Communication Manager, 03-300509.
Slot Display only. The slot location for the circuit pack.
Code/Suffix Display only. This field is automatically populated with
TN799DP for C-LAN, TN2302AP for IP Media Processor, or
TN2602AP for IP Media Resource 320, and the suffix
letter(s).
Node name The node name for the IP interface. This node name must
already be administered on the IP Node Names screen.
IP Address Display only. The IP address for this IP interface. The IP
address is associated with the node name on the IP Node
Names screen.

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Field Conditions/Comments
Subnet Mask The subnet mask associated with the IP address for this IP
interface.
Link? Display only. Shows the administered link number for an
Ethernet link. See Assigning link through Ethernet data
module (S8500/S8700-series) on page 148
Gateway Address The address of a network node that serves as the default
gateway for the IP interface.
Enable Ethernet Enter y
Port?
Allow H.323 Controls whether IP endpoints can register on the interface.
Endpoints? On a simplex main server, enter y to allow H.323 endpoint
connectivity to the PE interface. Enter n if you do not want
H.323 endpoint connectivity to the PE interface.

Note: For an Enterprise Survivable Server (ESS), this field

is display-only and is set to n. H.323 endpoint connectivity
using the PE interface on an ESS server is not supported.
For a Local Survivable Processor (LSP), this field is
display-only and is set to y.
Network Region The region number for the IP interface. Enter a value
between 1-250
Allow H.248 Controls whether H.28 media gateways (G700, G350,
Gateways? G250) can register on the interface. On a simplex main
server, enter y to allow H.248 endpoint connectivity to the
PE interface. Enter n if you do not want H.248 endpoint
connectivity to the PE interface.
Note: For an Enterprise Survivable Server (ESS), this field
is display-only and is set to n. H.248 endpoint connectivity
using the PE interface on an ESS server is not supported.
For a Local Survivable Processor (LSP), this field is
display-only and is set to y.
VLAN The 802.1Q virtual LAN value (0 - 4094) or n (no VLAN).
This VLAN field interfaces with the TN799 (C-LAN) or
TN802B Media Processor circuit packs; it does not send any
instructions to IP endpoints.
Gatekeeper Priority? Appears only if Allow H.323 Endpoints is y and the
Communication Manager server is a main server or an LSP.
This field does not display on an ESS server. This field
allows a priority to be set on the interface. This affects where
the interface appears on the gatekeeper list.
Enter the desired priority number, a value from 1 to 9. The
value in this field is used on the alternate gatekeeper list.
The lower the number, the higher the priority. Default is 5.

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Field Conditions/Comments
VOIP Channels Appears only for a TN2602AP circuit pack. Enter the
number of VoIP channels assigned to the TN2602AP circuit
pack, either 0, 80, or 320. 0 means the circuit pack will not
be used.
Note:
Note: If two TN2602 circuit packs in a port network
are administered for 320 channels, only 512
channels are used due to the 512 TDM
timeslot maximum for a port network.
The system-wide number of TN2602 circuit packs
administered for 80 channels cannot exceed the number of
80-channel licenses installed on system. Similarly, the
number of TN2602 circuit packs administered for 320
channels cannot exceed the number of 320-channel
licenses installed on the system.
Target socket load Always leave the default (400) unless instructed to enter a
and Warning level different value (1 to 499) by Avaya Services.
Receive Buffer TCP A value of 512 to 8320
Window Size
Auto? Set Ethernet Options to match the customers network. The
Speed recommended settings are:
Duplex ● Auto? n
If you set Auto to n, also complete the following fields. The
recommended values are displayed.
● Speed: 100 Mbps
● Duplex: Full
See IP Telephony Implementation Guide, for a discussion of
the Ethernet Options settings.

3. Submit the screen.

Defining IP interfaces (duplicated TN2602AP)

To define IP interfaces for duplicate TN2602AP Media Resource 320 circuit packs:
1. Type add ip-interface CCccss to open the IP Interfaces screen.
The IP Interfaces screen appears.

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Note:
Note: This screen shows the display for the S8500/S8700 media servers.

add ip-interface 1a03 Page 1 of 1

IP INTERFACES

Critical Reliable Bearer? n

Type: MEDPRO
Slot: 01A03
Code/Suffix: TN2602
Node Name: medres03a01
IP Address: 192.168.1.82
Subnet Mask: 255.255.255.0
Gateway Address: . . .
Enable Ethernet Port? y
Network Region: 1
VLAN: n

ETHERNET OPTIONS
Auto? n
Speed: 100 Mbps
Duplex: Full

2. In the Critical Reliable Bearer? field, type y, and press Enter.

A second column of data for a standby TN2602AP appears on the right of the screen.

add ip-interface 1a03 Page 1 of 1

IP INTERFACES

Critical Reliable Bearer? y

Type: MEDPRO
Slot: 01A03 Slot:
Code/Suffix: TN2602 Code/Suffix:
Node Name: medpro03a01 Node Name:
IP Address: 192.168.1.82 IP Address:
Subnet Mask: 255.255.255.0
Gateway Address: . . .
Enable Ethernet Port? y Enable Ethernet Port? y
Network Region: 1
VLAN: n VLAN: n
VOIP Channels: xxx
Shared Virtual Address: 255.255.255.255
Virtual MAC Table: Virtual MAC Address:
ETHERNET OPTIONS
Auto? n Auto? n
Speed: 100 Mbps Speed: 100 Mbps
Duplex: Full Duplex: Full

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3. Complete the following fields as shown:

Field Conditions/Comments
Type Display only. This field is automatically populated with MEDPRO.
Slot Slot location entered in the command line.
Enter the location of the second TN2602AP circuit pack for a non-duplicated
board.
The second (right-side) Slot field is automatically populated when Critical
Reliable Bearer is y.
Code/Sfx Circuit pack TN code and suffix. Display only for TN2602AP when Critical
Reliable Bearer is n.
The second (right-side) Code/Sfx field is automatically populated based on
the corresponding Slot field information, when Critical Reliable Bearer is y.
Node name The node name for the IP interface. This node name must already be
administered on the IP Node Names screen.
IP Address Display only. The IP address for this IP interface. The IP address is
associated with the node name on the IP Node Names screen.
Subnet Mask Enter the Subnet Mask for TN2602AP.
This entry also applies to the second TN2602AP circuit pack when Critical
Reliable Bearer is y
Gateway The IP address of the LAN gateway associated with the TN2602AP.
Address This entry also applies to the second TN2602AP circuit pack when Critical
Reliable Bearer is y
Enable y/n
Ethernet Pt y = The Ethernet Port associated with the TN2602AP is in service.
If this is an active board, set to n only when there is no standby, or when the
standby has been disabled.
Note:
Note: Note: You may be required to enter n in this field before you
make changes to this screen.
Network Number of the Network Region where the interface resides.
Region This entry also applies to the second TN2602AP circuit pack when Critical
Reliable Bearer is y
VLAN The 802.1Q virtual LAN value (0 - 4094) or n (no VLAN). This VLAN field
interfaces with the media processor circuit packs; it does not send any
instructions to IP endpoints.
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Field Conditions/Comments
VOIP 0 (will not support voice calls)
Channels 80 (low density)
320 (standard)
The number of VoIP channels that are allocated to the associated TN2602.
Appears for a TN2602 circuit pack on Communication Manager 3.0/V13 or
greater.
This number also applies to the second TN2602AP circuit pack when Critical
Reliable Bearer is y
Users will be blocked from administering 80 or 320 VoIP channels if there is
no available capacity for the corresponding "Maximum TN2602 boards with
80 VoIP Channels"/"Maximum TN2602 boards with 320 VoIP Channels"
license feature.
Shared The virtual IP address shared by the two TN2602AP circuit packs, when
Virtual duplicated. This address enables Communication Manager to connect
Address endpoints through the TN2602AP circuit packs to the same address,
regardless of which one is actually active.
Appears when Critical Reliable Bearer is y.
Virtual MAC 1 through 4, default = 1
Table Table number where the virtual MAC address, shared by duplicated
TN2602AP circuit packs, is obtained.
Appears when Critical Reliable Bearer is y.
You might choose a different table number other than 1 if all of the following
conditions exist:
● A port network under the control of a different Communication
Manager main server has duplicated TN2602AP circuit packs.
● That port network controlled by a different main server has the same
number as the port network in which you are administering the
TN2602AP circuit packs.
● The port network or its main server connects to the same Ethernet
switch as the port network in which you are administering the
TN2602AP circuit packs.
Selecting a different Virtual MAC Table from that chosen for a port network
that has the previously-listed conditions helps prevent the possibility that two
TN2602AP circuit packs within the customer’s network will have the same
virtual MAC address.
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Field Conditions/Comments
Virtual MAC Virtual MAC address that is shared by duplicated TN2602AP circuit packs.
Address Automatically populated based on the Virtual MAC address table.
Appears when Critical Reliable Bearer is y.
Auto? Set Ethernet Options to match the customers network. The recommended
settings are:
● Auto? n
If you set Auto to n, also complete the following fields. The recommended
values are displayed.
● Speed: 100 Mbps
● Duplex: Full
See IP Telephony Implementation Guide, for a discussion of the Ethernet
Options settings.
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4. Submit the screen.

Assigning link through Ethernet data module (S8500/S8700-series)

Note:
Note: The S8300 Media Server does not support data modules.
This section describes how to administer an Ethernet data module for the connection between
the C-LAN circuit pack’s Ethernet port (port 17) and the LAN. The data module associates a link
number and extension number with the C-LAN Ethernet port location. This association is used
by the processor to set up and maintain signaling connections for multimedia call handling.
The C-LAN Ethernet port is indirectly associated with the C-LAN IP address through the slot
location (which is part of the port location) on the IP Interfaces screen and the node name,
which is on both the IP Interfaces and Node Names screens.
To assign a link through an Ethernet data module:
1. Type add data-module next to open the Data Module screen.

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Data Module screen

add data-module next Page 1 of 1
DATA MODULE

Data Extension: 700 Name:__________

Type: Ethernet
Port:
Link:

Network uses 1’s for Broadcast Addresses? y

2. Complete the following fields as shown:

Field Conditions/Comments
Data Extension Populated automatically with the next qualifier
or type the extension number.
Type Enter Ethernet. This indicates the
data-module type for this link.
Port Ethernet connections must be assigned to port
17 on the C-LAN circuit pack.
Link Enter the link number, a link not previously
assigned on this switch.
Name Display only. The name appears in lists
generated by the list data module command.
Network uses 1’s for Enter y if the private network contains only
broadcast addresses Avaya switches and adjuncts.
Enter n if the network includes non-Avaya
switches that use the 0’s method of forming
broadcast addresses.

For more information on the fields that may appear on this screen, see the Administrator Guide for Avaya
Communication Manager, 03-300509.

3. Submit the screen.

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Implementing Best Service Routing (optional)

Use H.323 trunks to implement Best Service Routing (BSR). You can use H.323 trunks for
polling, or for both polling and interflow. Because polling requires only a small amount of data
exchange, the additional network traffic is insignificant. However, interflow requires a significant
amount of bandwidth to carry the voice data. Depending on the other uses of the LAN/WAN and
its overall utilization rate, voice quality could be degraded to unacceptable levels.
Avaya recommends that if H.323 trunks are used for BSR interflow, the traffic should be routed
to a low-occupancy or unshared LAN/WAN segment. Alternatively, you might want to route
internal interflow traffic, which may have lower quality-of-service requirements, over H.323
trunks, and route customer interflow traffic over circuit-switched tie trunks.

Administering H.323 trunks

In the previous sections, you have completed the pre-administration tasks to set up H.323
trunks (see Setting up H.323 trunks for administration). This section describes the tasks that
you need to complete to administer an H.323 trunk. Sample values are used to populate the
fields to show the relationships between the screens and fields. Perform the following tasks:
● Creating an H323 trunk signaling group
Create a signaling group for the H.323 trunks that connect this switch to a far-end switch.
● Creating a trunk group for H.323 trunks
● Modifying the H.323 trunk signaling group
Modify the signaling group by entering the H.323 trunk group number in the Trunk Group
for the Channel Selection field of the Signaling Group screen.

Creating an H323 trunk signaling group

Create a signaling group that is associated with H.323 trunks that connect this switch to a
far-end switch. One or more unique signaling groups must be established for each far-end node
to which this switch is connected through H.323 trunks.
Note:
Note: The following steps address only those fields that are specifically related to H.323
trunks. The other fields are described in the Administrator Guide for Avaya
Communication Manager, 03-300509.
To create an H.323 trunk signaling group, do the following:
1. Type add signaling-group number to open the Signaling Group screen.

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Signaling Group screen

add signaling-group xx Page 1 of 5
SIGNALING GROUP

Group Number: 1 Group Type: h.323

Remote Office?
SBS? __ Max Number of NCA TSC: 0
Max number of CA TSC: 0
IP Video? n Trunk Group for NCA TSC: ___
Trunk Group for Channel Selection: 75
Supplementary Service Protocol: a
T303 Timer (sec): 10

Near-end Node Name: clan-a1 Far-end Node Name: clan-b1

Near-end Listen Port: 1720 Far-end Listen Port: 1720
Far-end Network Region:
LRQ Required? n Calls Share IP Signaling Connection? n
RRQ Required? n
Media Encryption? y
Passphrase: Bypass If IP Threshold Exceeded? y
H.235 Annex H Required? n
DTMF over IP: out-of-band Direct IP-IP Audio Connections? y
Link Loss Delay Timer(sec): 90 IP Audio Hairpinning? n
Enable Layer 3 Test? y Interworking Message: PROGress
DCP/Analog Bearer Capability: 3.1kHz

2. Complete the following fields as shown:

Table 7: Signaling Group screen options

Field Conditions/Comments
Group Type Enter h.323
Trunk Group for Leave blank until you create a trunk group in the
Channel Selection following task, then use the change command and
enter the trunk group number in this field.
T303 Timer Use this field to enter the number of seconds the
system waits for a response from the far end
before invoking Look Ahead Routing. Appears
when the Group Type field is isdn-pri (DS1 Circuit
Pack screen) or h.323 (Signaling Group screen).
Near-end Node Name Enter the node name for the C-LAN IP interface
on this switch. The node name must be
administered on the Node Names screen and the
IP Interfaces screen.
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Table 7: Signaling Group screen options (continued)

Field Conditions/Comments
Far-end Node Name This is the node name for the far-end C-LAN IP
Interface used for trunks assigned to this signaling
group. The node name must be administered on
the Node Names screen on this switch.
Leave blank when the signaling group is
associated with an unspecified destination.
Near-end Listen Port Enter an unused port number from the range
1719, 1720 or 5000–9999. Avaya recommends
1720. If the LRQ field is y, enter 1719.
Far-end Listen Port Enter the same number as the one in the Near-end
Listen Portfield. This number must match the
number entered in the Near-end Listen Port field on
the signaling group screen for the far-end switch.
Leave blank when the signaling group is
associated with an unspecified destination.
Far-end Network Region Identify network assigned to the far end of the
trunk group. The region is used to obtain the
codec set used for negotiation of trunk bearer
capability. If specified, this region is used instead
of the default region (obtained from the C-LAN
used by the signaling group) for selection of a
codec.
Enter a value between 1-250. Leave blank to
select the region of the near-end node (C-LAN).
LRQ Required Enter n when the far-end switch is an Avaya
product and H.235 Annex H Required? is set to n.
Enter y when:
● H.235 Annex H Required? is set to y, or
● the far-end switch requires a location
request to obtain a signaling address in its
signaling protocol.
Calls Share IP Signaling Enter y for connections between Avaya
Connection equipment.
Enter n when the local and/or remote switch is not
Avaya’s.
RRQ Required Enter y when a vendor registration request is
required.
Bypass if IP Threshold Enter y to automatically remove from service
Exceeded? trunks assigned to this signaling group when IP
transport performance falls below limits
administered on the Maintenance-Related
System Parameters screen.
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Table 7: Signaling Group screen options (continued)

Field Conditions/Comments
H.235 Annex H Enter y to indicate that the CM server requires the
Required? use of H.235 amendment 1 with annex H protocol
for authentication during registration.
DTMF Over IP? SIP trunks only. Support for SIP Enablement
Services (SES) trunks requires the default entry of
rtp-payload.
Direct IP-IP Audio Allows direct audio connections between H.323
Connections? endpoints. For SIP Enablement Services (SES)
trunk groups, this is the value that allows direct
audio connections between SES endpoints.
Enter a y to save on bandwidth resources and
improve sound quality of voice over IP (VoIP)
transmissions.
IP Audio Hairpinning? The IP Audio Hairpinning field entry allows the
option for H.323 and SIP Enablement Services
(SES)-enabled endpoints to be connected through
the IP circuit pack in the media server or switch,
without going through the time division
multiplexing (TDM) bus.
Type y to enable hairpinning for H.323 or SIP
trunk groups. Default is n.
Interworking Message This field determines what message Avaya
Communication Manager sends when an
incoming ISDN trunk call interworks (is routed
over a non-ISDN trunk group).
Normally select the value, PROGress, which asks
the public network to cut through the B-channel
and let the caller hear tones such as ringback or
busy tone provided over the non-ISDN trunk.
Selecting the value ALERTing causes the public
network in many countries to play ringback tone to
the caller. Select this value only if the DS1 is
connected to the public network, and it is
determined that callers hear silence (rather than
ringback or busy tone) when a call incoming over
the DS1 interworks to a non-ISDN trunk.
DCP/Analog Bearer This field sets the information transfer capability in
Capability a bearer capability IE of a setup message to
speech or 3.1kHz. The latter is the default.
The default value provides 3.1kHz audio encoding
in the information transfer capability. Selecting the
value of speech provides speech encoding in the
information transfer capability.
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3. If using DCS, go to the Administered NCA TSC Assignment page of this screen.
Enter NCA TSC information on this screen according the detailed descriptions contained in
the Screen Reference chapter of the Administrator Guide for Avaya Communication
Manager, 03-300509.
4. Submit the screen.

Creating a trunk group for H.323 trunks

This task creates a new trunk group for H.323 trunks. Each H.323 trunk must be a member of
an ISDN trunk group and must be associated with an H.323 signaling group.
Note:
Note: The following steps address only those fields that are specifically related to H.323
trunks. The other fields are described in the Administrator Guide for Avaya
Communication Manager, 03-300509.
To create an ISDN trunk group, do the following:
1. Type add trunk-group next to open the Trunk Group screen.
Trunk Group screen
add trunk-group next Page 1 of x
TRUNK GROUP

Group Number: 3__ Group Type: isdn CDR Reports: y

Group Name: TG 3 for H.323 trunks COR: 1 TN: 1__ TAC: 103
Direction: two-way Outgoing Display? n Carrier Medium: H.323
Dial Access? y Busy Threshold: 99 Night Service: _____
Queue Length: 0
Service Type: tie Auth Code? n Test Call ITC: unre
Far End Test Line No:
Test Call BCC: 0 ITC? unre

add trunk-group next Page 2 of x

TRUNK GROUP

Group Type: isdn

TRUNK PARAMETERS
Codeset to Send Display: 0 Codeset to Send National IEs: 6
Max Message Size to Send: 260 Charge Advice: none
Supplementary Service Protocol: a Digit Handling (in/out): enbloc/enbloc

Trunk Hunt: cyclical QSIG Value-Added? n

Digital Loss Group: 13
Incoming Calling Number - Delete: Insert: Format:
Bit Rate: 1200 Synchronization: async Duplex: full
Disconnect Supervision - In? y Out? n
Answer Supervision Timeout: 0
Administer Timers? n

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2. Complete the following fields as shown:

Field Conditions/Comments
Group Type Enter isdn
Carrier Medium Enter H.323
Service Type Enter tie
TestCall ITC Enter unre (unrestricted).
TestCall BCC Enter 0
Codeset to Send Display Enter 0
Outgoing Display This field might need to be changed if the
far-end is not Avaya’s.

3. Go to the Trunk Features page of this screen.

Trunk Features screen
add trunk-group next Page 3 of x
TRUNK FEATURES
ACA Assignment? n Measured: none Wideband Support? n
Maintenance Tests? y
Data Restriction? n NCA-TSC Trunk Member:
Send Name: y Send Calling Number:
y
Used for DCS? n Send EMU Visitor CPN?
n
Suppress # Outpulsing? n Format: public
Outgoing Channel ID Encoding: exclusive UUI IE Treatment: service-provider

Replace Restricted Numbers? n

Replace Unavailable Numbers? n
Send Connected Number: n
Hold/Unhold Notifications? n
Send UUI IE? y
Send UCID? n
Send Codeset 6/7 LAI IE? y DS1 Echo Cancellation? n

Apply Local Ringback? n US NI Delayed Calling Name Update? n

Show ANSWERED BY on Display? y
Network (Japan) Needs Connect Before Disconnect? n

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4. Complete the following fields as shown:

Field Conditions/Comments
Send Name If y is entered, either the ISDN Numbering -
Send Calling Number Public/Unknown Format screen, or the
Send Connected Number ISDN Numbering - Private screen (based on
the Format field) is accessed to construct the
actual number to be sent to the far end.

5. To add a second signaling group, go to the Group Member Assignments page of this
screen.

add trunk-group next Page 6 of x

TRUNK GROUP
Administered Members (min/max): 0/0
GROUP MEMBER ASSIGNMENTS Total Administered Members: 0

Port Code Sfx Name Night Sig Grp

1: ip H.323 Tr 1 3
2: ip H.323 Tr 2 3
3: ip H.323 Tr 3
4:
5:

Note:
Note: Each signaling group can support up to 31 trunks. If you need more than 31
trunks between the same two switches, add a second signaling group with
different listen ports and add the trunks to the existing or second trunk group.
6. Enter group numbers using the following fields:

Field Conditions/Comments
Port Enter ip. When the screen is submitted, this value is
automatically changed to a T number (Txxxxx).
Name Enter a 10-character name to identify the trunk.
Sig Grp Enter the number for the signaling group associated with
this H.323 trunk.

Modifying the H.323 trunk signaling group

Modify the Signaling Group screen to add a trunk group number to the Trunk Group for
Channel Selection field.
To modify an H.323 trunk signaling group:
1. Type busy signaling-group number to busy-out the signaling group.
2. Type change signaling-group number to open the Signaling Group screen.

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Signaling Group screen

change signaling-group xx Page 1 of 5
SIGNALING GROUP

Group Number ___ Group Type: h.323

Remote Office?__ Max Number of NCA TSC: 0
SBS?__ Max number of CA TSC: 0
IP Video? n Priority Video? n Trunk Group for NCA TSC: ___
Trunk Group for Channel Selection: 75
Supplementary Service Protocol: a
T303 Timer (sec): 10

Near-end Node Name: clan-a1 Far-end Node Name: clan-b1

Near-end Listen Port: 1720 Far-end Listen Port: 1720
Far-end Network Region:
LRQ Required? n Calls Share IP Signaling Connection? n
RRQ Required? n
Media Encryption? y
Passphrase: Bypass If IP Threshold Exceeded? y
H.235 Annex H Required? n
DTMF over IP: out-of-band Direct IP-IP Audio Connections? y
Link Loss Delay Timer(sec): 90 IP Audio Hairpinning? n
Enable Layer 3 Test? y Interworking Message: PROGress
DCP/Analog Bearer Capability: 3.1kHz

3. Complete the following field:

Field Conditions/Comments
Trunk Enter the trunk group number. If there is more
Group for than one trunk group assigned to this signaling
Channel group, the group entered in this field is the group
Selection that accepts incoming calls.

4. Submit the screen.

5. Type release signaling-group number to release the signaling group.

Dynamic generation of private/public calling party numbers

Often it is necessary to generate a private Calling Party Number (CPN) for calls within a
network, but a public CPN for calls that route through the main network switch to the PSTN.

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Consider a network such as the following:

Private/public calling party numbers (CPN)

In this network, the customer wants to use internal numbering among the nodes of the network
(for example, a 4-digit Uniform Dial Plan (UDP)), but when any node dials the PSTN, to route
the call to the PSTN through the main switch.
On page 2 of the ISDN Trunk Group screen, set the Numbering Format field to private or
unk-pvt. (The value unk-pvt means "encode the number as an "unknown" type of number, but
use the Numbering-Private Format screen to generate the actual number.)
Note:
Note: IP trunks function as ISDN trunks in this respect.
In the network example, the system only generates a Private CPN if the caller dials a Private
(level 0/1/2) or Unknown (unk-unk) number. If the caller dials a Public number, the system
generates a Public CPN. It is necessary to fill out the Numbering-Private Format and
Numbering-Public/Unknown Format forms appropriately, and then to set the IP trunk groups
on the two satellites to use private or unk-pvt Numbering Format for their CPNs.
Note:
Note: You can designate the type of number for an outgoing call as Private (level 0/1/2)
either on the AAR Analysis screen or on the Route Pattern screen, but you can
only designate the type of number as Unknown (unk-unk) on the Route Pattern
screen. If the customer uses UDP, Unknown is the better Type of Number to use.
The default Call Type on the AAR Analysis screen is aar. For historical reasons, aar maps to a
"public" numbering format. Therefore, you must change the Call Type for calls within your
network from aar to a private or unk-unk type of number. For a UDP environment, the
recommended way is to set the Numbering Format to unk-unk on the Route Pattern screen.

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Administering Avaya phones

The following sections describe the installation and administration of Avaya IP telephones:
● Administering IP Softphones
● Installing and administering Avaya IP telephones

Administering IP Softphones
IP Softphones operate on a PC equipped with Microsoft Windows and with TCP/IP connectivity
through Communication Manager. Avaya offers three different Softphone applications:
● IP Softphone for any phone user
● IP Agent for call center agents
● Softconsole for attendants
IP Softphones can be configured to operate in any of the following modes:
● Road-warrior mode consists of a PC running the Avaya IP Softphone application and
Avaya iClarity IP Audio, with a single IP connection to an Avaya server or gateway.
● Telecommuter mode consists of a PC running the Avaya IP Softphone application with an
IP connection to the server, and a standard telephone with a separate PSTN connection to
the server.
● Shared Control mode provides a registration endpoint configuration that will allow an IP
Softphone and a non-Softphone telephone to be in service on the same extension at the
same time. In this new configuration, the call control is provided by both the Softphone and
the telephone endpoint. The audio is provided by the telephone endpoint.
Documentation on how to set up and use the IP Softphones is included on the CD-ROM
containing the IP Softphone software. Procedures for administering Communication Manager to
support IP Softphones are given in Administrator Guide for Avaya Communication Manager,
03-300509.

Administering the IP Softphone

This section focuses on administration for the trunk side of the Avaya IP Solutions offer, plus a
brief checklist of IP Softphone administration. Comprehensive information on the administration
of IP Softphones is given in Administrator Guide for Avaya Communication Manager,
03-300509.
There are two main types of IP Softphone configurations:
● Administering a Telecommuter phone
● Administering a Road-warrior phone

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Communication Manager can distinguish between various IP stations at RAS using the product
ID and release number sent during registration. An IP phone with an Avaya manufacturer ID
can register if the number of stations with the same product ID and the same or lower release
number is less than the administered system capacity limits. System limits are based on the
number of simultaneous registrations. Note that a license is required for each station that is to
be IP softphone enabled.

Administering a Telecommuter phone

The Telecommuter uses two connections: one to the PC over the IP network and another
connection to the telephone over the PSTN. IP Softphone PC software handles the call
signaling. With IP Softphone R5 or greater, iClarity is automatically installed to handle voice
communications.
Note:
Note: The System Parameters Customer Options screen is display only. Use the
display system-parameters customer-options command to review the
screen. The License File controls the system software release, the Offer
Category, features, and capacities. The init login does not have the ability to
change the customer options, offer options, or special applications screens.
To administer a Telecommuter phone:
1. Type display system-parameters customer-options and press Enter to open
the System Parameters Customer Options screen.
Verify that IP Softphone is enabled. Review the following fields on the screen:

Field Value

Maximum Identifies the maximum number of IP

Concurrently stations that are simultaneously
Registered IP registered, not the maximum number that
Stations are simultaneously administered.
This value must be greater than 0, and
must be less than or equal to the value for
Maximum Ports.
Maximum Specifies the maximum number of remote
Concurrently office stations that are simultaneously
Registered Remote registered, not the maximum number that
Office Stations are simultaneously administered.
This value must be greater than 0, and
must be less than or equal to the value for
Maximum Ports.
IP Stations This value should be y.

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Field Value

Product ID This is a 10-character field that allows any

character string. For new installations, IP
Soft, IP Phone, IP Agent and IP ROMax,
the product IDs automatically appear
Rel. (Release) Identifies the release number.
Limit This field defaults to the maximum
allowed value, based on the Concurrently
Registered Remote Office Stations field on
page 1 of the System Parameters
Customer Options screen.

2. Type add station next and press Enter to open the Station screen and complete the
fields listed in the table below to add a DCP station (or change an existing DCP station):

Field Value

Type Enter the phone model, such as 6408D.

Port Enter x if virtual, or the port number of an
existing phone.
Security Enter the user’s password.
Code
IP Softphone Enter y.

3. Go to page 2; verify whether the field Service Link Mode: as-needed is set as shown.
4. Install the IP Softphone software on the user’s PC.

Administering a Road-warrior phone

The road-warrior uses two separate software applications running on a PC that is connected
over an IP network. The single network connection carries two channels: one for call control
signaling and one for voice. IP Softphone software handles the call signaling. With IP Softphone
R5 or greater, iClarity is automatically installed to handle voice communications.
Note:
Note: The System Parameters Customer Options screen is display only. Use the
display system-parameters customer-options command to review the
screen. The License File controls the system software release, the Offer
Category, features, and capacities. The init login does not have the ability to
change the customer options, offer options, or special applications screens.

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To administer a Road-warrior phone:

1. Type display system-parameters customer-options.
Verify that IP Softphone is enabled. Go to the appropriate pages on the System
Parameters Customer Options screen to review the following fields:

Field Value

Maximum Specifies the maximum number of IP stations

Concurrently that are simultaneously registered, not the
Registered IP maximum number that are simultaneously
Stations administered.
This value must be greater than 0.
IP Stations Must be y.
Product ID This is a 10-character field that allows any
character string. For new installations, IP Soft,
IP Phone, IP Agent and IP ROMax product
IDs automatically display.
Rel. (Release) Identifies the release number
Limit Defaults to 1

2. Type add station next and press Enter to open the Station screen and complete the
fields listed in the table below to add a DCP station (or change an existing DCP station):

Field Value

Type Enter the phone model you wish to use, such

as 6408D.
Port Enter x if virtual, or the port number of an
existing phone. If only an IP Softphone, enter
IP.
Security Code Enter the user’s password.
IP Softphone Enter y.

3. Go to page 2; Service Link Mode: as-needed.

Install the IP Softphone software on the user’s PC (iClarity automatically installed with the
IP Softphone R2 or greater).

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Installing and administering Avaya IP telephones

The Avaya line of digital business phones uses Internet Protocol (IP) technology with Ethernet
line interfaces and has downloadable firmware.
IP Telephones provide support for dynamic host configuration protocol (DHCP) and trivial file
transfer protocol (TFTP) over IPv4/UDP, which enhance the administration and servicing of the
phones.
For more information on installing and administering Avaya IP telephones, see 4600 Series IP
Telephone R2.1 LAN Administrator's Guide, 555-233-507.

About the 4600-series IP telephones

The 4600-series IP Telephone product line possesses a number of shared model features and
capabilities. All models also feature
● Downloadable firmware
● Automatic IP address resolution through DHCP
● Manual IP address programming.
The 4600-series IP Telephone product line includes the following telephones:
● Avaya 4601 IP telephone
● Avaya 4602SW IP telephone
● Avaya 4606 IP telephone
● Avaya 4610SW IP telephone
● Avaya 4620SW/4621SW IP telephone
● Avaya 4622SW IP telephone
● Avaya 4624 IP telephone
● Avaya 4625SW IP telephone
● Avaya 4630SW IP Screenphone
● Avaya 4690 IP conference telephone
Support for SIP-enabled applications may be added to several of these IP telephones via a
model-specific firmware update. See the Avaya Firmware Download Web site for more details.
For information on feature functionality of the IP telephones, see the Hardware Description and
Reference for Avaya Communication Manager (555-245-207), the 4600 Series IP Telephone
Installation Guide (555-233-128), or the appropriate 4600-series IP Telephone user's guide.

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About IP telephone hardware/software requirements

Note:
Note: Communication Manager requires that IP telephones still running R2.1 or earlier
software be upgraded to R2.2.1 or newer software. Earlier software used a dual
connection architecture that is no longer supported.
4600-series IP Telephones are shipped from the factory with operational firmware installed.
Some system-specific software applications are downloaded from a TFTP server through
automatic power-up or reset. The 4600-series IP Telephones search and download new
firmware from the TFTP server before attempting to register with Communication Manager.
During a Communication Manager upgrade, any data in the /tftpboot directory is overwritten
with new software and firmware. For more detailed information on managing the firmware and
configuration files for the 4600-series IP telephones during Communication Manager upgrades,
see Installing and Upgrading the Avaya G700 Media Gateway and Avaya S8300 Media Server
(555-234-100), or Upgrading, Migrating, and Converting Media Servers and Gateways
(03-300412).
The software treats the 4600-series IP Telephones as any new station type, including the
capability to list/display/change/duplicate/alias/remove station.
Note:
Note: Audio capability for the IP Telephones requires the presence of the TN2302AP IP
Media Processor or TN2602AP Media Resource 320 circuit pack, either of which
provide hairpinning and IP-IP direct connections. Using a media processor
resource conserves TDM bus and timeslot resources and improves voice quality.

The 4600-series IP Telephone also requires a TN799DP Control- LAN (C-LAN)

circuit pack for the signaling capability on the DEFINITY Server csi platform. You
do not need a C-LAN circuit pack to connect an IP Telephone if your system has
built-in (for example, using an Avaya S8300 Media Server or Avaya S8700-series
Media Server) or Processor Ethernet capability.

To install required TN2302AP, TN2602AP, and TN799DP circuit packs, if necessary

1. Determine the carrier/slot assignments of the circuit packs to be added.
2. Insert the circuit pack into the slot specified in step 1.
Note:
Note: You do not have to power down the cabinet to install the circuit packs.

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Administering Avaya IP telephones

IP Telephones R1.5 or greater use a single connection, and you only need to administer the
station type.

To add an IP telephone
1. Type add station next to go to the Station screen.
Station screen
add station next Page 1 of 5
STATION

Extension: 2010 Lock Messages? n BCC: 0

Type: 4624 Security Code: TN: 1
Port: IP Coverage Path 1: COR: 1
Name: Coverage Path 2: COS: 1
Hunt-to Station:
STATION OPTIONS
Time of Day Lock Table:
Loss Group: 2 Personalized Ringing Pattern: 1
Message Lamp Ext: 2010
Speakerphone: 2-way Mute Button Enabled? y
Display Language: english
Survivable GK Node Name:
Survivable COR: internal Media Complex Ext:
Survivable Trunk Dest? y IP Softphone? y

2. Complete the fields as shown in the following table:

Field Value

Extension Enter the IP Telephone 4600-series model number,

Type such as 4624. The following phones are
administered with an alias:
● 4601 (administer as a 4602)
● 4602SW (administer as a 4602)
● 4690 (administer as a 4620)
Port Enter x, or IP.

Note:
Note: A 4600-series IP Telephone is always administered as an X port, and then once it
is successfully registered by the system, a virtual port number will be assigned.
(Note that a station that is registered as “unnamed” is not associated with any
logical extension or administered station record.)

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3. For dual-connection architecture IP Telephones (R2 or earlier), complete the fields as

shown in the following table:

Field Value

Media Complex Ext Enter the H.323 administered extension.

Port Enter x.

4. Submit the screen.

About hairpinning and shuffling

Avaya Communication Manager can shuffle or hairpin call path connections between two IP
endpoints by rerouting the voice channel away from the usual TDM bus connection and creating
a direct IP-to-IP connection. Shuffling and hairpinning are similar because they preserve
connection and conversion resources that might not be needed, depending on the compatibility
of the endpoints that are attempting to interconnect.
Shuffling and hairpinning techniques differ in the way that they bypass the unnecessary
call-path resources (compare either Figure 27: Shuffled audio connection between IP
endpoints in the same network region on page 168 or Figure 28: Shuffled audio connection
between IP endpoints in different network regions on page 169 with Figure 29: Hairpinned
audio connection between 2 IP endpoints in the same network region on page 172).
Shuffled or hairpinned connections:
● Conserve channels on the TN2302AP IP Media Processor and TN2602AP IP Media
Resource 320.
● Bypass the TDM bus, conserving timeslots.
● Improve voice quality by bypassing the codec on the TN2302AP IP Media Processor and
TN2602AP IP Media Resource 320 circuit packs.
Because shuffling frees up more resources on the TN2302AP IP Media Processor and
TN2602AP IP Media Resource 320 circuit packs than hairpinning does, Communication
Manager first checks both endpoints to determine whether the Determining if shuffling is
possible on page 167 are met. If the shuffling criteria are not met, Communication Manager
routes the call according to the What are the criteria for hairpinning on page 171, if hairpinning
is enabled. If hairpinning is not enabled, Communication Manager routes the call to the TDM
bus. Both endpoints must connect through the same TN2302AP IP Media Processor and
TN2602AP IP Media Resource 320 for Communication Manager to shuffle or hairpin the audio
connection.
For information on interdependencies that enable hairpinning and shuffling audio connections,
see Hairpinning and shuffling administration interdependencies on page 173. For a discussion
of Network Address Translation (NAT), see About Network Address Translation (NAT) on
page 174.

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What hardware and endpoints are required

The TN2302AP IP Media Processor or TN2602AP IP Media Resource 320 circuit pack is
required for shuffling or hairpinning audio connections.
The specific endpoint types that you can administer for hairpinning or shuffling are:
● All Avaya IP stations
● Other vendors’ H.323-compatible stations

What are shuffled audio connections

Shuffling an audio connection between two IP endpoints means rerouting voice channel away
from the usual TDM bus connection and creating a direct IP-to-IP connection. Shuffling saves
such resources as TN2302AP or TN2602AP channels and TDM bus time slots and improves
voice quality because the shuffled connection bypasses the TN2302AP’s or TN2602AP’s
codec. Both endpoints must be capable of shuffling (support H.245 protocol) before
Communication Manager can shuffle a call.

Determining if shuffling is possible

Communication Manager uses the following criteria to determine whether a shuffled audio
connection is possible:
● A point-to-point voice connection exists between two endpoints.
● No other active call (in-use or held) that requires TDM connectivity (for example, applying
tones, announcement, conferencing, and others) exists on either endpoint.
● The endpoints are in the same network region or in different, interconnected regions.
● Both endpoints or connection segments are administered for shuffling by setting the Direct
IP-IP Audio Connections field on the Station screen on page 185 or the Signaling group
screen on page 183) to y.
● If the Direct IP-IP Audio Connections field is y (yes), but during registration the endpoint
indicates that it does not support audio shuffling, then a call cannot be shuffled.

If the Direct IP-IP Audio Connections field is n (no), but during registration the endpoint
indicates that it can support audio shuffling, then calls to that endpoint cannot be shuffled,
giving precedence to the endpoint administration.
● The rules for Inter-network region connection management on page 180 are met.
● There is at least one common codec between the endpoints involved and the Inter-network
region Connection Management codec list.
● The endpoints have at least one codec in common as shown in their current codec
negotiations between the endpoint and the switch.
● Both endpoints can connect through the same TN2302AP IP Media Processor or
TN2602AP IP Media Resource 320 circuit packs.

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What are shuffling examples

Shuffling within the same network region

Figure 27: Shuffled audio connection between IP endpoints in the same network region on
page 168 and Figure 28: Shuffled audio connection between IP endpoints in different network
regions on page 169 provide examples of shuffled audio connections.

Figure 27: Shuffled audio connection between IP endpoints in the same network region

1
Packet bus

TDM bus

cydfad02 KLC 011303

2 3

4 NIC NIC

Ethernet 5
Network region 1
Shuffled
audio
connection

IP phone IP phone
A B

Figure notes:

1. Avaya server 4. TN799 Control LAN (C-LAN)

2. TN2302AP IP Media Processor and TN2602AP circuit pack
IP Media Resource 320 circuit pack 5. LAN/WAN segment administered
3. TN2302AP IP Media Processor and TN2602AP in Communication Manager as
IP Media Resource 320 circuit pack network region 1.

Figure 27: Shuffled audio connection between IP endpoints in the same network region on
page 168 is a schematic of a shuffled connection between two IP endpoints within the same
network region. After the call is shuffled, the IP Media Processors are out of the audio
connection, and those channels are free to serve other media connections.

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Shuffling between different network regions

Figure 28: Shuffled audio connection between IP endpoints in different network regions

1
Packet bus

TDM bus

cydfad03 KLC 011303

2 3

4 NIC NIC

Ethernet 5
Network region 1

Shuffled
audio
connection
Router
IP phone Ethernet 7
6
A
Network region 2

Router

IP phone
B

Figure notes:

1. Avaya server 5. LAN/WAN segment administered in

2. TN2302AP IP Media Processor and Communication Manager as network
TN2602AP IP Media Resource 320 circuit region 1.
pack 6. IP voice packet path between LAN
3. TN2302AP IP Media Processor and routers
TN2602AP IP Media Resource 320 circuit 7. LAN/WAN segment administered in
pack Communication Manager as network
4. TN799 Control LAN (C-LAN) circuit pack region 2.

Figure 28: Shuffled audio connection between IP endpoints in different network regions on
page 169 is a schematic of a shuffled audio connection between two IP endpoints that are in
different network regions that are interconnected and the inter-network region connection
management rules are met. After the call is shuffled, both Media Processors are bypassed,
making those resources available to serve other media connections. The voice packets from IP
endpoints flow directly between LAN routers.

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Determining whether an endpoint supports shuffling

Placing a test call from an endpoint that is capable of shuffling to another endpoint whose
shuffling capability is unknown can help you to determine whether an endpoint supports audio
shuffling or not.
To determine whether an endpoint supports shuffling:
1. Administer the Direct IP-IP Audio Connections field on page 2 as y (yes) on both
endpoint’s station screen (change station extension).
2. From the endpoint that can support shuffling, place a call to the endpoint that you are
testing.
Wait 2 minutes.
3. At the SAT type status station extension (administered extension of the endpoint
that you are testing) and press Enter to display the Station screen for this extension.
4. Note the Port field value in the GENERAL STATUS section of page 1.
5. Scroll to page 4
In the AUDIO CHANNEL section note the value of the Audio field under the Switch Port
column.
● If the values are the same, the endpoint is capable of shuffling.
Administer the Direct IP-IP Audio Connections field (change station extension,
page 2) as y (yes).
● If the values are different, then the endpoint cannot shuffle calls.
Administer the Direct IP-IP Audio Connections field (change station extension,
page 2) as n (no).

Administrable loss plan

To prevent audio levels from changing when a 2-party call changes from the TDM bus to a
shuffled or hairpinned connection, two party connections between IP endpoints are not subject
to the switch’s administrable loss plan. Although IP endpoints can be assigned to administrable
loss groups, the switch is only able to change loss on IP Softphone calls including
circuit-switched endpoints. Conference calls of three parties or more are subject to the
administrable loss plan, whether those calls involve IP endpoints or not.

What are hairpinned audio connections

Hairpinning means rerouting the voice channel connecting two IP endpoints so that the voice
channel goes through the TN2302AP IP Media Processor and TN2602AP IP Media Resource
320 circuit packs in IP format instead of through the TDM bus. Communication Manager
provides only shallow hairpinning, meaning that only the IP and Real Time Protocol (RTP)
packet headers are changed as the voice packets go through the TN2302AP or TN2602AP
circuit pack. This requires that both endpoints use the same codec (coder/decoder), a circuit
that takes a varying-voltage analog signal through a digital conversion algorithm to its digital
equivalent or vice-versa (digital to analog). Throughout this section, when the word “hairpin” is
used, it means shallow hairpinning.

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What are the criteria for hairpinning

Communication Manager uses the following criteria to determine whether to hairpin the
connection:
● A point-to-point voice connection exists between two endpoints.
● The endpoints are in the same network region, or in different, interconnected regions.
● A single TN2302AP IP Media Processor or TN2602AP IP Media Resource 320 circuit pack
serves both endpoints.
● The endpoints use a single, common codec.
● The endpoints are administered for hairpinning: the Direct IP-IP Audio Connections field
on the Station screen on page 185 or the Signaling group screen on page 183) is y.
● If the IP Audio Hairpinning field is y (yes), but during registration the endpoint indicates
that it does not hairpinning, then a call cannot be hairpinned.

If the IP Audio Hairpinning field is n (no), but during registration the endpoint indicates
that it can support hairpinning, then calls to that endpoint cannot be hairpinned, giving
precedence to the endpoint administration.
● The Determining if shuffling is possible on page 167 are not met.
● Both endpoints can connect through the same TN2302AP IP Media Processor or
TN2602AP IP Media Resource 320 circuit pack.

What is an example of a hairpinned call

Hairpinned audio connections:
● Set up within approximately 50 ms
● Preserve the Real-Time Protocol (RTP) header (for example the timestamp and packet
sequence number).
● Do not require volume adjustments on Avaya endpoints, however non-Avaya endpoints
might require volume adjustment after the hairpinned connection is established.
Figure 29: Hairpinned audio connection between 2 IP endpoints in the same network region on
page 172 is a schematic of a hairpinned audio connection between two IP endpoints in the
same network region.

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Figure 29: Hairpinned audio connection between 2 IP endpoints in the same network
region

1
Packet bus

TDM bus

Audio Audio

CODEC CODEC

RTP Hairpinning RTP

cydfad01 KLC 010903

3 NIC

Ethernet 4
Network region 1

IP phone IP phone
A B

Figure notes:

1. Avaya server 3. TN799 Control LAN (C-LAN) circuit pack

2. TN2302AP IP Media Processor and 4. LAN/WAN segment administered in
TN2602AP IP Media Resource 320 Communication Manager as network
circuit pack region 1.

Figure 29: Hairpinned audio connection between 2 IP endpoints in the same network region on
page 172 shows that hairpinned calls bypass the TN2302AP’s or TN2602AP’s codec, thus
freeing those resources for other calls. The necessary analog/digital conversions occur in the
common codec in each endpoint.

What causes a hairpinned call to be redirected

Whenever a third party is conferenced into a hairpinned call or a tone or announcement must be
inserted into the connection, the hairpinned connection is broken and the call is re-routed over
the TDM bus.

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Determining which TN2302AP or TN2602AP circuit pack is hairpinning

Whenever a TN2302AP IP Media Processor or TN2602AP IP Media Resource 320 circuit pack
is hairpinning any calls, its yellow LED is on steady. Although there is no simple way to identify
all of the extension numbers that are hairpinning through a particular TN2302AP or TN2602AP
circuit pack, you can determine which TN2302AP or TN2602AP circuit pack a particular
extension is using for hairpinning.
To determine which TN2302AP or TN2602AP circuit pack is hairpinning:
1. At the SAT, type status station extension and press Enter to display the Station
screen for that extension.
2. Scroll to page 4 of the report.
3. In the AUDIO CHANNEL section, check whether there is a value in the Audio field under
the Switch Port column.
If there is no port listed, then the call is hairpinned.

Hairpinning and shuffling administration interdependencies

Table 8: Hairpinning and shuffling administration on page 174 summarizes the Communication
Manager interdependencies that enable hairpinning and shuffling audio connections.
Note:
Note: In order to use hairpinning or shuffling with either Category A or B features, the
Software Version field (list configuration software-versions) must
be R9 or greater.

! Important:
Important: Encryption must be disabled for hairpinning to work, because encryption
requires the involvement of resources that are not used in the shallow hairpinning
connection. This not the case for shuffling, however.

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Table 8: Hairpinning and shuffling administration

Administration Required Other interactions

screen customer
options1

Station IP Stations Hairpinning is not available if

Remote Office Service Link Mode field on
Station screen is permanent.
Shuffling is available only for
these endpoints2:
● Avaya IP telephone R2
● Avaya IP Softphone (R2
or older)
Signaling group H.323 Trunks
Inter network region H.323 Trunks User login must have features
IP Stations permissions.
Remote Office
Feature-Related System H.323 Trunks
Parameters IP Stations
Remote Office

1. The fields listed in this column must be enabled through the License File. To determine
if these customer options are enabled, use the display system-parameters
customer-options command. If any of the fields listed in this column are not
enabled, then either the fields for hairpinning and shuffling are not displayed or, in the
case of the Inter Network Region Connection Management screen, the second page
(the actual region-to-region connection administration) does not display.
2. Although other vendors’ fully H.323v2-compliant products should have shuffling
capability, you should test that before administering such endpoints for hairpinning or
shuffling. See the section titled Determining whether an endpoint supports shuffling on
page 170.

About Network Address Translation (NAT)

Network address translation (NAT) is a function, typically in a router or firewall, by which an
internal IP address is translated to an external IP address. The terms “internal” and “external”
are generic and ambiguous, and they are more specifically defined by the application. For
example, the most common NAT application is to facilitate communication from hosts on private
networks to hosts on the public Internet. In such a case, the internal addresses are private
addresses, and the external addresses are public addresses.

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Note:
Note: This common NAT application does not use a web proxy server, which would be
an entirely different scenario.
Another common NAT application is for some VPN clients. The internal address in this case is
the physical address, and the external address is the virtual address. This physical address
does not necessarily have to be a private address as shown here, as the subscriber could pay
for a public address from the broadband service provider. But regardless of the nature of the
physical address, the point is that it cannot be used to communicate back to the enterprise
through a VPN tunnel. Once the tunnel is established, the enterprise VPN gateway assigns a
virtual address to the VPN client application on the enterprise host. This virtual address is part
of the enterprise IP address space, and it must be used to communicate back to the enterprise.
The application of the virtual address varies among VPN clients. Some VPN clients integrate
with the operating system in such a way that packets from IP applications (for example, FTP or
telnet) on the enterprise host are sourced from the virtual IP address. That is, the IP
applications inherently use the virtual IP address. With other VPN clients this does not occur.
Instead, the IP applications on the enterprise host inherently use the physical IP address, and
the VPN client performs a NAT to the virtual IP address. This NAT is no different than if a router
or firewall had done the translation.

What are the types of NAT

Static 1-to-1 NAT
Static 1-to-1 NAT is what has already been covered up to this point. In static 1-to-1 NAT, for
every internal address there is an external address, with a static 1-to-1 mapping between
internal and external addresses. It is the simplest yet least efficient type of NAT, in terms of
address preservation, because every internal host requires an external IP address. This
limitation is often impractical when the external addresses are public IP addresses. Sometimes
the primary reason for using NAT is to preserve public IP addresses, and for this case there are
two other types of NAT: many-to-1 and many-to-a-pool.

Dynamic Many-to-1 NAT

Dynamic many-to-1 NAT is as the name implies. Many internal addresses are dynamically
translated to a single external address. Multiple internal addresses can be translated to the
same external address, when the TCP/UDP ports are translated in addition to the IP addresses.
This is known as network address port translation (NAPT) or simply port address translation
(PAT). It appears to the external server that multiple requests are coming from a single IP
address, but from different TCP/UDP ports. The NAT device remembers which internal source
ports were translated to which external source ports.
In the simplest form of many-to-1 NAT, the internal host must initiate the communication to the
external host, which then generates a port mapping within the NAT device, allowing the external
host to reply back to the internal host. It is a paradox with this type of NAT (in its simplest form)
that the external host cannot generate a port mapping to initiate the communication with the
internal host, and without initiating the communication, there is no way to generate the port
mapping. This condition does not exist with 1-to-1 NAT, as there is no mapping of ports.

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Dynamic Many-to-a-Pool NAT

Many-to-a-pool NAT combines some of the characteristics of both 1-to-1 and many-to-1 NAT.
The general idea behind many-to-a-pool NAT is that a 1-to-1 mapping is not desired, but there
are too many internal hosts to use a single external address. Therefore, a pool of multiple
external addresses is used for NAT. There are enough external addresses in the pool to support
all the internal hosts, but not nearly as many pool addresses as there are internal hosts.

What are the issues between NAT and H.323

Some of the hurdles that NAT presents to H.323 include:
● H.323 messages, which are part of the IP payload, have embedded IP addresses in them.
NAT translates the IP address in the IP header, but not the embedded addresses in the
H.323 messages. This is a problem that can be and has been addressed with H.323-aware
NAT devices. It has also been addressed with Avaya Communication Manager 1.3 and later
versions of the NAT feature.
● When an endpoint (IP telephone) registers with the gatekeeper (call server), that
endpoint’s IP address must stay the same for the duration of the registration.
This rules out almost all current implementations of many-to-a-pool NAT.
● TCP/UDP ports are involved in all aspects of IP telephony — endpoint registration, call
signaling, and RTP audio transmission.
These ports must remain unchanged for the duration of an event, duration of the
registration, or duration of a call. Also, the gatekeeper must know ahead of time which ports
will be used by the endpoints for audio transmission, and these ports can vary on a per call
basis. These requirements make it very difficult for H.323 to work with port address
translation (PAT), which rules out almost all current implementations of many-to-1 and
many-to-a-pool NAT.

Avaya Communication Manager NAT Shuffling feature

The Avaya Communication Manager NAT Shuffling feature permits IP telephones and IP
Softphones to work behind a NAT device. This feature was available prior to release 1.3, but it
did not work with shuffled calls (Direct IP-IP Audio enabled). The NAT feature now works with
shuffled calls.

Terms:
The following terms are used to describe the NAT Shuffling feature:
● Native Address — The original IP address configured on the device itself (internal
address)
● Translated Address — The IP address after it has gone through NAT, as seen by devices
on the other side of the translation (external address)

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● Gatekeeper — The Avaya device that is handling call signaling.

It could be a portal to the gatekeeper, such as a C-LAN, or the gatekeeper itself, such as an
S8300 Media Server.
● Gateway — The Avaya device that is handling media conversion between TDM and IP,
such as a MedPro board, G700 VoIP Media Module, or G350 Media Gateway.
The essence of this feature is that Communication Manager keeps track of the native and
translated IP addresses for every IP station (IP telephone or IP Softphone). If an IP station
registration appears with different addresses in the IP header and the RAS message, the call
server stores the two addresses and alerts the station that NAT has taken place.
This feature works with static 1-to-1 NAT. It does not work with NAPT, so the TCP/UDP ports
sourced by the IP stations must not be changed. Consequently, this feature does not work with
many-to-1 NAT. This feature may work with many-to-a-pool NAT, if a station’s translated
address remains constant for as long as the station is registered, and there is no port
translation.
The NAT device must perform plain NAT – not H.323-aware NAT. Any H.323-aware feature in
the NAT device must be disabled, so that there are not two independent devices trying to
compensate for H.323 at the same time.

Rules:
The following rules govern the NAT Shuffling feature. The Direct IP-IP Audio parameters are
configured on the SAT ip-network-region screen.
1. When Direct IP-IP Audio is enabled (default) and a station with NAT and a station without
NAT talk to one another, the translated address is always used.
2. When two stations with NAT talk to one another, the native addresses are used (default)
when Yes or Native (NAT) is specified for Direct IP-IP Audio, and the translated addresses
are used when Translated (NAT) is specified.
3. The Gatekeeper and Gateway must not be enabled for NAT. As long as this is true, they
may be assigned to any network region.

Administering hairpinning and shuffling

Choosing how to administer hairpinning and shuffling

You can administer shuffled and hairpinned connections:
● Independently for system-wide applicability
● Within a network region
● At the user level

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Table 9: Hairpinning and shuffling administration on page 178 lists the forms and provides links
to all three levels:

Table 9: Hairpinning and shuffling administration

Level Communication Link to procedure

Manager screen

System Feature-Related Administering hairpinning and shuffling at

System the system-level on page 178
Parameters
Network Network Region Administering hairpinning and shuffling in
region network regions on page 180
IP Trunks Signaling Group Administering H.323 trunks for hairpinning
and shuffling on page 183
IP endpoints Station Administering IP endpoints for hairpinning
and shuffling on page 184

Administering hairpinning and shuffling at the system-level

You can administer hairpinning or shuffling as a system-wide parameter.

To administer hairpinning and shuffling as a system-level parameter

1. At the SAT, type change system-parameters features and press Enter to display
the Feature-Related System Parameters screen:

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Feature-Related System Parameters screen

change system-parameters features Page x of y
FEATURE-RELATED SYSTEM PARAMETERS

AUTOMATIC EXCLUSION PARAMETERS

Automatic Exclusion by COS? n

Recall Rotary Digit: 2

Duration of Call Timer Display (seconds): 3

WIRELESS PARAMETERS
Radio Controllers with Download Server Permission (enter board location)

1: 2: 3: 4: 5:

IP PARAMETERS
Direct IP-IP Audio Connections? n
IP Audio Hairpinning? n

RUSSIAN MULTI-FREQUENCY PACKET SIGNALING

Retry?_
T2 (Backward signal) Activation Timer (secs):__

2. To allow shuffled IP calls using a public IP address (default), go to the page with IP
PARAMETERS and set the Direct IP-IP Audio Connections field to y.
To disallow shuffled IP calls set this field to n. Be sure that you understand the interactions
in Hairpinning and shuffling administration interdependencies on page 173 and the notes
below.
3. To allow hairpinned audio connections, type y (yes) in the IP Audio Hairpinning field,
noting the interactions in Hairpinning and shuffling administration interdependencies on
page 173 and the notes below.
4. Save the changes.
Note:
Note: The Direct IP-IP Audio Connections and IP Audio Hairpinning fields do not
display if the IP Stations field, the H.323 Trunks field, and the Remote Office
field on the Customer Options screen are set to n.

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Administering hairpinning and shuffling in network regions

Inter-network region connection management

Shuffling and hairpinning endpoints or media processing resources in any given network region
is independently administered per network region, which uses a matrix to define the desired
connections between pairs of regions.
The matrix is used two ways:
● It specifies what regions are valid for resource allocation when resources in the preferred
region are unavailable.
● When a call exists between two IP endpoints in different regions, the matrix specifies
whether those two regions can be directly connected.
To administer hairpinning or shuffling within a network region:
1. At the SAT type change ip-network-region number and press Enter to display the IP
Network Region screen.
IP Network Region screen
change ip-network-region 1 Page 1 of 19
IP NETWORK REGION
Region: 1
Location: Authoritative Domain:
Name:
Intra-region IP-IP Direct Audio: yes
MEDIA PARAMETERS Inter-region IP-IP Direct Audio: yes
Codec Set: 1 IP Audio Hairpinning? n
UDP Port Min: 2048
UDP Port Max: 3028 RTCP Reporting Enabled? n
RTCP MONITOR SERVER PARAMETERS
DIFFSERV/TOS PARAMETERS Use Default Server Parameters? y
Call Control PHB Value: 34
Audio PHB Value: 46
Video PHB Value: 26
802.1P/Q PARAMETERS
Call Control 802.1p Priority: 7
Audio 802.1p Priority: 6
Video 802.1p Priority: 5 AUDIO RESOURCE RESERVATION PARAMETERS
H.323 IP ENDPOINTS RSVP Enabled? n
H.323 Link Bounce Recovery? y
Idle Traffic Interval (sec): 20
Keep-Alive Interval (sec): 5
Keep-Alive Count: 5

2. Administer the IP-IP Direct Audio fields:

● The Intra-region IP-IP Direct Audio field permits shuffling if both endpoints are in the
same region.

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● The Inter-region IP-IP Direct Audio field permits shuffling if the two endpoints are in two
different regions.
The allowable values for both fields are:
- y -- permits shuffling the call
- n -- disallows shuffling the call
- native-- the IP address of a phone itself, or no translation by a Network Address
Translation (NAT) device
- translated -- the translated IP address that a Network Address Translation (NAT)
device provides for the native address
Note:
Note: If there is no NAT device in use at all, then the native and translated addresses
are the same. For more information on NAT, see the Administrator Guide for
Avaya Communication Manager, 03-300509 and Avaya Application Solutions: IP
Telephony Deployment Guide (555-245-600).
Note:
Note: The hairpinning and shuffling fields on the IP Network Regions screen do not
display unless the IP Stations, the H.323 Trunks, or the Remote Office field is
set to y (yes) on the Optional Features (display system-parameter
customer-options) screen. These features must be enabled in the system’s
License File.
3. Go to page 3 and administer the common codec sets on the Inter Network Region
Connection Management screen (Inter Network Region Connection Management
screen on page 182). For more detailed information about the fields on this screen, see the
Screen Reference chapter of the Administrator Guide for Avaya Communication Manager,
03-300509.
Note:
Note: You cannot connect IP endpoints in different network regions or share TN799
C-LAN or TN2032 IP Media Processor resources between/among network
regions unless you make a codec entry in this matrix specifying the codec set to
be used. For more information, see Administering IP CODEC sets on page 213.

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Inter Network Region Connection Management screen

change ip-network-region n Page 3 of x

Inter Network Region Connection Management

src dst codec direct Total Video Dyn

rgn rgn set WAN WAN-BW-limits Norm Prio Shr Intervening-regions CAC IGAR
3 1 1 y 256:Kbits
3 2 1 n n 1 ___ ___ ___ n
3 3 1
3 4 1 n y 1 ___ ___ ___ n
3 5 1 n y 6 ___ ___ ___
3 6 1 y :NoLimit
3 7 1 y 10:Calls
3 8
3 9 3 y
3 10
3 11
3 12
3 13
3 14
3 15

For this example screen, network region 3 communicates with:

● Network regions 1 through 7 using codec set 1
● Network region 9 using codec set 3.
Note:
Note: Use the list ip-codec-set command for a list of codecs.
4. Save the changes.

Administering and selecting codecs

When an IP endpoint calls another IP endpoint, Communication Manager asks that the 2nd
endpoint choose the same codec that the 1st endpoint offered at call setup. However, if the 2nd
endpoint cannot match the 1st’s codec, the call is set up with each endpoint’s administered
(preferred) codec, and the data streams are converted between them, often resulting in
degraded audio quality because of the different compressions/decompressions or multiple use
of the same codec. For more information, see Administering IP CODEC sets on page 213.
When an endpoint (station or trunk) initially connects to the server, Communication Manager
selects the first codec that is common to both the server and the endpoint. The Inter Network
Region Connection Management screen specifies codec set(s) to use within an individual
region (intra-region) and a codec set to use between/among (inter-region) network regions.
Depending upon the network region of the requesting H.323 endpoint or trunk and the network
region of the TN2302AP IP Media Processor or TN2602AP IP Media Resource 320 circuit pack:
● If the endpoint and the TN2302AP or TN2602AP are in same region, the administered
intra-region codec set is chosen.

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● If the endpoint and the TN2302AP or TN2602AP are in different regions, the administered
inter-region codec set is chosen.
For example, a region might have its intra-network codec administered as G.711 as the first
choice, followed by the other low bit rate codecs. The Inter Network Region Connection
Management screen for the inter-network region might have G.729 (a low-bit codec that
preserves bandwidth) as the only choice. Initially, when a call is set up between these two
interconnected regions, the TN2302AP IP Media Processor or TN2602AP IP Media Resource
320 provides the audio stream conversion between G.711 and G.729. When the media stream
is shuffled away from a TDM-based connection, the two endpoints can use only the G.729
codec.
Note:
Note: If you are administering an H.323 trunk that uses Teletype for the Deaf (TTD),
use the G.711 codec as the primary choice for those trunks. This ensures
accurate TTD tone transmission through the connection.

Administering H.323 trunks for hairpinning and shuffling

To administer an H.323 trunk for hairpinning or shuffling

1. At the SAT, type change signaling group number and press Enter to display the
Signaling Group screen (Signaling group screen on page 183).
Signaling group screen
change signaling-group 4 Page 1 of 5
SIGNALING GROUP

Group Number: 4 Group Type: h.323

Remote Office?_ Max number of NCA TSC: 5
SBS?_ Max number of CA TSC: 5
IP Video? n Trunk Group for NCA TSC: 44
Trunk Group for Channel Selection: 44
Supplementary Service Protocol: a Network Call Transfer?_
T303 Timer (sec): 10

Near-end Node Name: mipsn01A Far-end Node Name: dr98

Near-end Listen Port: 1800 Far-end Listen Port: 1800
Far-end Network Region:_
LRQ Required? y Calls Share IP Signaling Connection? y
RRQ Required?_
Media Encryption?_ Bypass If IP Threshold Exceeded? y
H.323 Annex H Required?
DTMF over IP:_ Direct IP-IP Audio Connections? n
Link Loss Delay Timer(sec): 90 IP Audio Hairpinning? n
Interworking Message: PROGress
DCP/Analog Bearer Capability: 3.1kHz

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2. To allow shuffled IP calls using a public IP address (default), set the Direct IP-IP Audio
Connections field to y.
To disallow shuffled IP calls set this field to n. Be sure that you understand the interactions
in Hairpinning and shuffling administration interdependencies on page 173 and the notes
below.
3. To allow hairpinned audio connections, type y (yes) in the IP Audio Hairpinning field,
noting the interactions in Hairpinning and shuffling administration interdependencies on
page 173 and the notes below.
4. Save the changes.
Note:
Note: The hairpinning and shuffling fields on the Signaling Group screen do not
display unless either the H.323 Trunks or Remote Office field is set to y (yes) on
the Optional Features (display system-parameters
customer-options) screen. These features must be enabled in the system’s
License File.
Note:
Note: If you are administering an H.323 trunk that uses Teletype for the Deaf (TTD),
use the G.711 codecs as the primary codec choice for those trunks to ensure
accurate TTD tone transmission through the connection.

Administering IP endpoints for hairpinning and shuffling

Whether any given station is allowed to shuffle or hairpin is independently administered per
endpoint on the Station screen. The specific station types that you can administer for
hairpinning or shuffling are:
● All Avaya IP stations
● Other vendors’ H.323-compatible stations

To administer an IP endpoint for hairpinning or shuffling

1. At the SAT, type change station extension and press Enter to display the Station
screen (Station screen on page 185)

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Station screen
change station 57493 Page 2 of 4
STATION
FEATURE OPTIONS
LWC Reception: spe Auto Select Any Idle Appearance? n
LWC Activation? y Coverage Msg Retrieval? y
LWC Log External Calls? n Auto Answer: none
CDR Privacy? n Data Restriction? n
Redirect Notification? y Idle Appearance Preference? n
Per Button Ring Control? n Bridged Idle Line Preference? n
Bridged Call Alerting? n Restrict Last Appearance? y
Active Station Ringing: single

H.320 Conversion? n Per Station CPN - Send Calling Number?

Service Link Mode: as-needed
Multimedia Mode: basic Audible Message Waiting? n
MWI Served User Type: Display Client Redirection? n
AUDIX Name: Select Last Used Appearance? n
Coverage After Forwarding? s
Multimedia Early Answer? n
Direct IP-IP Audio Connections? y
Emergency Location Ext: 12345 Always use? n IP Audio Hairpinning? n

2. To allow shuffled IP calls using a public IP address (default), set the Direct IP-IP Audio
Connections field to y.
To disallow shuffled IP calls set this field to n. Be sure that you understand the interactions
in Hairpinning and shuffling administration interdependencies on page 173 and the notes
below.
3. To allow hairpinned audio connections, type y in the IP Audio Hairpinning field, noting the
interactions in Hairpinning and shuffling administration interdependencies on page 173 and
the notes below.
4. Save the changes.
Note:
Note: The hairpinning and shuffling fields on the Station screen do not display unless
either the IP Stations or Remote Office field is set to y (yes) on the Optional
Features (display system-parameter customer-options) screen.
These features must be enabled in the system’s License File.
Note:
Note: The Direct IP-IP Audio Connections field cannot be set to y if the Service Link
Mode field is set to permanent.

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Contradictory IP station administration

● If an IP station is administered for dual-connect, and if the two extension numbers for that
station have differing values administered in their Direct IP-IP audio Connections fields,
then the station cannot shuffle calls.
● If an IP station is administered for dual-connect, and if the two extension numbers for that
station have differing values administered in their IP-IP Audio Hairpinning fields, then the
station cannot hairpin calls.

IP stations used for call center service-observing

If a Call Center agent is active on a shuffled call, and a Call Center supervisor wants to
service-observe the call, the agent might notice the 200 ms break in the speech while the call is
redirected to the TDM bus. For this reason, Avaya recommends that you administer the
shuffling and hairpinning fields as n (no) for stations that are used for service-observing.

Administering IP endpoint signal loss

The amount of loss applied between any two endpoints on a call is administrable. However, the
Telecommunications Industry Association (TIA) has published standards for the levels that IP
endpoints should use. The IP endpoints will always transmit audio at TIA standard levels, and
expect to receive audio at TIA standard levels. If an IP audio signal goes to or comes from the
TDM bus through a TN2302AP Media Processor or TN2602AP IP Media Resource 320, the
circuit pack adjusts the levels to approximately equal the levels of a signal to or from a DCP set.
By default, IP endpoints are the same loss group as DCP sets, Group 2.

Adjusting loss to USA DCP levels

The switch instructs the TN2302AP or TN2602AP circuit pack to insert loss into the signal
coming from the IP phone, and insert gain in the signal going to the IP phone, to equal the levels
of a signal to or from a DCP set.
Note:
Note: The voice level on a shuffled call is not affected by entries administered in the
2-Party Loss Plan screen.
Note:
Note: The loss that is applied to a hairpinned or shuffled audio connection is constant
for all three connection types: station-to-station, station-to-trunk, and
trunk-to-trunk

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 Administering FAX, modem, TTY, and H.323 clear channel calls over IP Trunks

Administering FAX, modem, TTY, and H.323 clear channel

calls over IP Trunks
Avaya Communication Manager transports FAX, modem, TTY, and clear channel calls over IP
interfaces using relay mode (see What is relay mode on page 187), pass-through mode (see
What is pass-through mode on page 188), or both. As a result, Communication Manager
supports transport of the following:
● Teletypewriter device (TTY) tone relay over the corporate IP intranet and the Internet
● Faxes over a corporate IP intranet
Note:
Note: The path between endpoints for FAX transmissions must use Avaya
telecommunications and networking equipment.
Note:
Note: Faxes sent to non-Avaya endpoints cannot be encrypted.
● T.38 FAX over the Internet (including endpoints connected to non-Avaya systems)
● Modem tones over a corporate IP intranet
● Clear channel data calls over IP
The path between endpoints for modem tone transmissions must use Avaya
telecommunications and networking equipment.

What is relay mode

In relay mode, the firmware on the device (the G700/G350 media gateway, the MM760 VoIP
media module, TN2302AP Media Processor, or TN2602AP IP Media Resource 320) detects the
tones of the call (FAX, modem, or TTY) and uses the appropriate modulation protocol (for FAX
or modem) or Baudot transport representation (TTY) to terminate or originate the call so that it
can be carried over the IP network. The modulation and demodulation for FAX and modem calls
reduces bandwidth use over the IP network and improves the reliability of transmission. The
correct tones are regenerated before final delivery to the endpoint.
Note:
Note: The number of simultaneous calls that a device (gateway, media module,
TN2302AP or TN2602AP) can handle is reduced by the modulation and
demodulation that the device must perform for relay mode.

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What is pass-through mode

In pass-through mode, the firmware on the device (the G700/G350 media gateway, the MM760
VoIP media module, TN2302AP Media Processor, or TN2602AP IP Media Resource 320)
detects the tones of the call (FAX, modem, or TTY) and uses G.711 encoding to carry the call
over the IP network. pass-through mode provides higher quality transmission when endpoints in
the network are all synchronized to the same clock source. The call is un-encoded before final
delivery to the endpoint.
Note:
Note: Though pass-through mode increases the bandwidth usage (per channel), it
allows the same number of simultaneous FAX/modem calls on the device as the
number of simultaneous voice calls. For example, on a G700 Media Gateway,
pass-through allows 64 simultaneous FAX/modem calls instead of only 16 with
relay.
Note:
Note: For pass-through mode on modem and TTY calls over an IP network, the
sending and receiving servers should have a common synchronization source.
Sychronized clocks can be established by using a source on the public network.
See Figure 30: IP network connections over which FAX, modem, and TTY calls
are made on page 189.
Note:
Note: You cannot send FAXes in pass-through mode with the T.38 standard.

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Figure 30: IP network connections over which FAX, modem, and TTY calls are made

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Overview of steps to administer FAX, TTY, modem,

and clear channel calls over IP trunks
The information in this section assumes the following:
● The endpoints sending and receiving the calls are connected to a private network that
uses H.323 trunking or LAN connections between gateways and/or port networks.
● Calls can either be passed over the public network using ISDN-PRI trunks or passed over
an H.323 private network to Communication Manager switches that are similarly enabled.
To administer FAX, TTY, modem, and clear channel calls over IP trunks, first consider the
following:
● FAX, TTY, modem, and clear channel transmission modes and speeds on page 191
● Considerations for administering FAX, TTY, modem, and clear channel transmission on
page 194
● Bandwidth for FAX, modem, TTY, and clear channel calls over IP networks on page 197
● Media encryption for FAX, modem, TTY, and clear channel on page 198
After considering the criteria from the preceding list, complete the following tasks:
1. Create one or more IP Codec sets that enable the appropriate transmission modes for the
endpoints on your gateways. See Administering IP CODEC sets on page 213.
Note:
Note: You create the FAX, modem, TTY, and clear channel settings (including
redundancy) on the second page of the IP Codec Set screen.
2. Assign each codec set to the appropriate network region. See Administering IP network
regions on page 220.
3. Assign the network region to the appropriate device(s):
● TN2302AP or TN2602AP (see Defining IP interfaces (C-LAN, TN2302AP, or TN2602AP
Load Balanced) on page 141)
● Avaya G350 Media Gateway or Avaya G700 Media Gateway
4. If the TN2302AP or TN2602AP resources are shared among administered network regions,
administer inter-network region connections. See Figure 34: IGAR system parameter on
page 235.

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FAX, TTY, modem, and clear channel transmission modes and

speeds
Communication Manager provides the following methods for supporting FAX, TTY, modem, and
clear channel transmission over IP (see Table 10: FAX, TTY, modem, and clear channel
transmission modes and speeds on page 191).

Table 10: FAX, TTY, modem, and clear channel transmission modes and speeds

Mode Maximum Comments

Rate

T.38 FAX 9600 bps This capability is standards-based and uses IP trunks and H.323
Standard signaling to allow communication with non-Avaya systems.
(relay only) Additionally, the T.38 FAX capability uses the Universal Datagram
Protocol (UDP).
Note:
Note: FAX endpoints served by two different Avaya media
servers can also send T.38 FAXes to each other if
both systems are enabled for T.38 FAX. In this case,
the media servers also use IP trunks.

However, if the T.38 FAX sending and receiving

endpoints are on port networks or media gateways
that are registered to the same media server, the
gateways or port networks revert to Avaya FAX relay
mode.
Both the sending and receiving systems must announce support of
T.38 FAX data applications during the H.245 capabilities exchange.
Avaya systems announce support of T.38 FAX if the capability is
administered on the Codec Set screen for the region and a
T.38-capable media processor was chosen for the voice channel. In
addition, for a successful FAX transmission, both systems should
support the H.245 null capability exchange (shuffling) in order to
avoid multiple IP hops in the connection.
Note:
Note: To use the T.38 FAX capability, modem relay and
modem pass-through must be disabled. Additionally,
the T.38 FAX capability does not support TCP, FAX
relay, or FAX pass-through.
You can assign packet redundancy to T.38 standard faxes to
improve packet delivery and robustness of FAX transport over the
network.
1 of 3

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Table 10: FAX, TTY, modem, and clear channel transmission modes and speeds (continued)

Mode Maximum Comments

Rate

FAX Relay 9600 bps Because the data packets for faxes in relay mode are sent almost
exclusively in one direction, from the sending endpoint to the
receiving endpoint, bandwidth use is reduced.
FAX V.34 (33.6 The transport speed is up to the equivalent of circuit-switched calls
pass-through kbps) and supports G3 and Super G3 FAX rates.
! CAUTION:
CAUTION: If users are using Super G3 FAX machines as well
as modems, do not assign these FAX machines to a
network region with an IP Codec set that is
modem-enabled as well as FAX-enabled. If its
Codec set is enabled for both modem and FAX
signaling, a Super G3 FAX machine incorrectly tries
to use the modem transmission instead of the FAX
transmission.

Therefore, assign modem endpoints to a network

region that uses a modem-enabled IP Codec set,
and assign the Super G3 FAX machines to a
network region that uses a FAX-enabled IP Codec
set.
You can assign packet redundancy in both pass-through and relay
mode, which means the media gateways use packet redundancy to
improve packet delivery and robustness of FAX transport over the
network.
pass-through mode uses more network bandwidth than relay mode.
Redundancy increases bandwidth usage even more.
TTY Relay 16 kbps This transport of TTY supports US English TTY (Baudot 45.45) and
UK English TTY (Baudot 50). TTY uses RFC 2833 or RFC 2198
style packets to transport TTY characters. Depending on the
presence of TTY characters on a call, the transmission toggles
between voice mode and TTY mode. The system uses up to 16
kbps of bandwidth, including packet redundancy, when sending TTY
characters and normal bandwidth of the audio codec for voice
mode.
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Table 10: FAX, TTY, modem, and clear channel transmission modes and speeds (continued)

Mode Maximum Comments

Rate

TTY 87-110 kbps In pass-through mode, you can also assign packet redundancy,
pass-through which means the media gateways send duplicated TTY packets to
ensure and improve quality over the network.
pass-through mode uses more network bandwidth than relay mode.
pass-through TTY uses 87-110 kbps, depending on the packet size,
whereas TTY relay uses, at most, the bandwidth of the configured
audio codec. Redundancy increases bandwidth usage even more.
Modem V.32 (9600 The maximum transmission rate may vary with the version of
Relay bps) firmware. The packet size for modem relay is determined by the
packet size of the codec selected but is always at least 30ms. Also,
each level of packet redundancy, if selected, increases the
bandwidth usage linearly (that is, the first level of redundancy
doubles the bandwidth usage; the second level of redundancy
triples the bandwidth usage, and so on).
Note:
Note: Modem over IP in relay mode is currently available
only for use by specific secure analog telephones
that meet the Future Narrowband Digital Terminal
(FNBDT) standard. See your sales representative
for more information. Additionally, modem relay is
limited to V.32/V.32bis data rates.
Modem V.34 (33.6 Transport speed is dependent on the negotiated rate of the modem
pass-through kbps) and endpoints. Though the media servers and media gateways support
V.90/V.92 modem signaling at v.34 (33.6 bps) or v.90 and v.92 (43.4 kbps), the
(43.4 kbps) modem endpoints may automatically reduce transmission speed to
ensure maximum quality of signals. V.90 and V.92 are speeds
typically supported by modem endpoints only when directly
connected to a service provider Internet service.
You can also assign packet redundancy in pass-through mode,
which means the media gateways send duplicated modem packets
to improve packet delivery and robustness of FAX transport over the
network.
pass-through mode uses more network bandwidth than relay mode.
Redundancy increases bandwidth usage even more. The maximum
packet size for modem pass-through is 20 ms.
Clear 64 kbps Does not support typically analog data transmission functionality like
Channel (unrestricted) FAX, modem, TTY, or DTMF signals. It is purely clear channel data.
In addition, no support is available for echo cancellation, silence
suppression, or conferencing.
H.320 video over IP using clear channel is not supported, because
of the need for a reliable synchronization source and transport for
framing integrity.
3 of 3

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Considerations for administering FAX, TTY, modem,

and clear channel transmission
There are a number of factors to consider when configuring your system for FAX, TTY, modem,
and clear channel calls over an IP network:
● Encryption
You can encrypt most types of relay and pass-through calls using either the Avaya
Encryption Algorithm (AEA) or the Advanced Encryption Standard (AES). See Media
encryption for FAX, modem, TTY, and clear channel on page 198.
● Bandwidth usage
Bandwidth usage of modem relay varies, depending on packet size used and the
redundancy level selected. The packet size for modem relay is determined by the packet
size of the codec selected. Bandwidth usage of modem pass-through varies depending on
the redundancy level and packet size selected. The maximum packet size for modem
pass-through is 20 ms.
Bandwidth usage for other modes also varies, depending on the packet size used, whether
redundant packets are sent, and whether the relay or pass-through method is used.
See Table 11: Bandwidth for FAX, modem, and TTY calls over IP networks on page 197 for
the bandwidth usage.
● Calls with non-Avaya systems
For FAX calls where one of the communicating endpoints is connected to a non-Avaya
communications system, the non-Avaya system and the Avaya system should both have
T.38 defined for the associated codecs.
Modem and TTY calls over the IP network cannot be successfully sent to non-Avaya
systems.
● Differing transmission methods at the sending/receiving endpoints
The transmission method or methods used on both the sending and receiving ends of a
FAX/modem/TTY/clear channel call should be the same.
In some cases, a call succeeds even though the transmission method for the sending and
receiving endpoints is different. Generally, however, for a call to succeed, the two endpoints
must be administered for the same transmission method.
● H.320 Video over IP using Clear Channel
H.320 video is not supported over IP using clear channel, because H.320 video requires a
reliable synchronization source and transport for framing integrity of the channels; however,
there is no such provision over IP networks. H.320 video might work in some cases for a
time, but eventually, the connection would drop because of delay and synchronization
problems.

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 Administering FAX, modem, TTY, and H.323 clear channel calls over IP Trunks

● Hardware requirements
The relay and pass-through capabilities require the following hardware:
- For DEFINITY CSI servers, S8500/S8500B Media Servers, or S8700-series Media
Servers, certain minimum hardware vintages and firmware versions are required for the
TN2302AP or the TN2602AP circuit pack; see the document titled Avaya Communication
Manager Minimum Firmware/Hardware Vintages at http://www.avaya.com/support.
- For the G700 or G350 Media Gateway, G700 or G350 firmware version 22.14.0, and
VoIP firmware Vintage 40 or greater to support Communication Manager 2.2 is required.
An MM760 Media Module with firmware Vintage 40 or greater may be used for additional
VoIP capacity. Check the latest firmware on the http://www.avaya.com/support website.
- For the Avaya S8300/S8300B Media Servers, the Avaya G250 Media Gateway, and the
Multi-Tech MultiVoIP Gateway, the firmware should be updated to the latest available on
the http://www.avaya.com/support website.
- For T.38 FAX capability, endpoints on other non-Avaya T.38 compliant communications
systems may send FAX calls to or receive FAX calls from endpoints on Avaya systems.
● Multiple hops and multiple conversions
If a FAX call must undergo more than one conversion cycle (from TDM protocol to IP
protocol and back to TDM protocol), FAX pass-through should be used. If FAX relay mode
is used, the call may fail due to delays in processing through more than one conversion
cycle. A modem or TTY call may undergo no more than one conversion cycle (from TDM
protocol to IP protocol and back to TDM protocol) on the communication path. If multiple
conversion cycles occur, the call fails. As a result, both endpoint gateways and any
intermediate servers in a path containing multiple hops must support shuffling for a modem
or TTY call to succeed.
For example, in Figure 31: Shuffling for FAX, modem, and TTY calls over IP on page 196, a
hop occurs in either direction for calls between port network A and Media Gateway C
because the calls are routed through port network D. In this case, shuffling is required on
port network A for calls going to Media Gateway C, and shuffling is required on port network
D for calls going from Media Gateway C to port network A.

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Figure 31: Shuffling for FAX, modem, and TTY calls over IP

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 Administering FAX, modem, TTY, and H.323 clear channel calls over IP Trunks

Bandwidth for FAX, modem, TTY, and clear channel calls over IP
networks
The following table identifies the bandwidth of FAX, modem, TTY, and clear channel calls based
on packet sizes used, redundancy used, and whether the relay or pass-through method is used.

Table 11: Bandwidth for FAX, modem, and TTY calls over IP networks
Packet
Size (in
msec Bandwidth (in kbps) (bidirectional)1
Redundancy = 0 Redundancy = 1 Red. = 2 Red. = 3
Modem
Relay at Clear Channel Clear Channel
TTY at TTY at TTY at FAX 9600 FAX/Modem FAX FAX/Modem FAX Relay3 FAX Relay3
G.711 G.729 G.7232 Relay3 Baud4 pass-through5 6 Relay3 4 pass-through 4 4

10 110 54 - - - 110 - 221 - -

20 87 31 - - - 87 - 174 - -

30 79 23 22 25 22.9 - 50 - 75 100

40 76 20 - - 19.6 - - - - -

50 73 17 - - 17.6 - - - - -

60 72 16 14 - 16.3 - - - - -
1. TTY, Modem Relay, Modem pass-through and FAX pass-through calls are full duplex. Multiply the mode’s
bandwidth by 2 to get the network bandwidth usage.
2. TTY at G723 supports packet size 30 and 60 ms.
3. FAX Relay supports packet size 30ms.
4. Non-zero redundancy options increase the bandwidth usage by a linear factor of the bandwidth usage when the
redundancy is zero.
5. FAX and Modem pass-through supports packet sizes 10 and 20 ms.
6. Clear Channel transport supports a packet size of 20 ms.

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Media encryption for FAX, modem, TTY, and clear channel

If media encryption is configured, the algorithm used during the audio channel setup of the call
will be maintained for most FAX relay and pass-through modes. The exception is the T.38
standard for FAX over IP, for which encryption is not used.
Note:
Note: Encrypted calls reduce Digital Signal Processing (DSP) capacity by 25%
compared to non-encrypted calls.
Encryption is applicable as shown in the following table.

Table 12: Encryption options

Call Type AEA AES SRTP1 Transport

Modem Pass-through Y Y Y RTP (RFC2198)
Modem Relay Y N N Proprietary
FAX Pass-through Y Y Y RTP
2
FAX Relay Y (Y) N Duplicate Packets
TTY Pass-through Y Y Y RTP
TTY Relay Y Y Y RTP
3 3
T.38 FAX Standard (Y) (Y) N T.38 UDPTL Redundancy
Clear Channel Y Y Y Clear 64 kbps over RTP
1. See SRTP media encryption on page 199 for a description of the SRTP encryption protocol.
2. AES encryption in FAX Relay is available only with Avaya equipment (TN2302) with the correct
vintages.
3. The T.38 Fax standard does not support encryption. An enhancement of the T.38 standard enables AES
and AEA encryption only with Avaya equipment (TN2302) with the correct vintage.

If the audio channel is encrypted, the FAX digital channel is also encrypted except for the
limitations described above. AEA-encrypted FAX and modem relay calls that switch back to
audio continue to be encrypted using the same key information used at audio call setup.
For the cases of encrypting FAX, modem, and TTY pass-through and TTY relay, the encryption
used during audio channel setup is maintained for the call’s duration.

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 SRTP media encryption

The software behaves in the following way for encryption:

1. For FAX, modem, and TTY pass-through and relay, the VoIP firmware encrypts calls as
administered on the CODEC set screen. These calls begin in voice, so voip encrypts the
voice channel as administered. If the media stream is converted to FAX, modem, or TTY
digital, the VoIP firmware automatically disables encryption as appropriate. When the call
switches back to audio, VoIP firmware encrypts the stream again.
2. For T.38 FAX, the VoIP firmware encrypts the voice channel as administered on the codec
set screen. When the call is converted to FAX, the VoIP firmware automatically turns off
encryption. If the call later reverts back to audio, VoIP firmware encrypts the stream again.

SRTP media encryption

Secure Real Time Protocol (SRTP) is a media encryption standard that provides encryption of
RTP media streams for SIP and 9600-series IP telephones. SRTP is defined in RFC 3711.
The following SRTP features are supported by Communication Manager, release 4.0 and later:
● Encryption of RTP (optional but recommended)
● Authentication of RTCP streams (mandatory)
● Authentication of RTP streams (optional but recommended)
● Protection against replay
The following SRTP features are currently not supported by Communication Manager:
● Encryption of RTCP streams
● Several automatic rekeying schemes
● Various other options within SRTP which are not expected to be used for VoIP, such as key
derivation rates or MKIs
Previous releases of Communication Manager supported AEA and AES media encryption for
H.323 calls but no media encryption was available for SIP calls. Starting with release 4.0, SRTP
provides encryption and authentication of RTP streams for SIP and provides authentication of
RTP and RTCP for SIP and H.323 calls using the 9600-series telephones.
SRTP encryption of FAX and modem relay and T.38 is not supported because they are not
transmitted in RTP. For this reason, in the case where an SRTP voice call changes to fax relay,
fax will not be encrypted.
SRTP is available only if Media Encryption is enabled in the license file and is activated by IP
codec set administration in the same manner as for the other encryption algorithms.

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Platforms
The SRTP feature is supported on all Linux-based platforms running Communication Manager
and on all versions of SES, regardless of platform, starting with the 4.0 release.
The following gateway platforms also support SRTP:
● TN2602AP Media Resource 320
● MM760
● VoIP Media Modules and on-board VoIP engines (G350 and G250).

Administering SRTP
Administering SRTP encryption is the same as administering AES and AEA encryption.
1. Ensure that media encryption is enabled. The Media Encryption? field must be set to y on
the Customer Options form.
2. Administer the Media Encryption type on the ip-codec-set form:
Media Encryption field — This field appears only if the Media Encryption over IP feature
is enabled in the license file. Use this field to specify a priority listing of the three possible
options for the negotiation of encryption.
3. Administer the ip-network-region form for SIP options:
Allow SIP URI Conversion? field — Use this field to specify whether a SIP Uniform
Resource Identifier (URI) is permitted to change. For example, if "sips://" in the URI is
changed to "sip://" then the call would be less secure but this may be necessary to complete
the call. If you enter n for 'no' URI conversion, then calls made from SIP endpoints that
support SRTP to other SIP endpoints that do not support SRTP will fail. Enter y to allow
conversion of SIP URIs. The default is y.

See About Media Encryption on page 246 for more information about administering SRTP.

200 Administration for Network Connectivity for Avaya Communication Manager

Chapter 4: Network quality administration

This section provides information for improving voice quality by adjusting the voice packet traffic
behavior through an IP network, also known as implementing Quality of Service (QoS). The
section covers these topics:
● About factors causing voice degradation introduces the types of voice degradation and
their causes.
● About Quality of Service (QoS) and voice quality administration tells you how to administer
your Avaya equipment for better voice quality and offers suggestions for other network
problems.
● About Media Encryption discusses media encryption capabilities, requirements, and
administration in Communication Manager.
● About network management includes information about administering H.248 Link
Recovery and the Avaya Policy Manager (APM) and Avaya VoIP Monitoring Manager
network monitoring tools.
Note:
Note: Implementing QoS requires administration adjustments to Avaya equipment as
well as LAN/WAN equipment (switches, routers, hubs, etc.).
For more information about QoS in Avaya IP Telephony networks, see Avaya Application
Solutions: IP Telephony Deployment Guide, 555-245-600.
For more information on implementing QoS, see the White Paper, Avaya IP Voice Quality
Network Requirements (LB1500-02), at http://www.avaya.com/master-usa/en-us/resource/
assets/whitepapers/lb1500-02.pdf.

About factors causing voice degradation

VoIP applications put severe constraints on the amount of end-to-end transfer delay of the voice
signal and routing. If these constraints are not met, users complain of garbled or degraded voice
quality, gaps, and pops. Due to human voice perception, VoIP applications can afford to
randomly lose a few voice packets and the user can still understand the conversation. However,
if voice packets are delayed or systematically lost, the destination experiences a momentary
loss of sound, often with some unpleasing artifacts like clicks or pops. Some of the general
complaints and their causes are listed in Table 13: User complaints and their causes on
page 202.

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Table 13: User complaints and their causes

Complaint Possible causes and links to

information

‘Talking over’ the far end ● Packet delay and loss

● Echo
● Network architecture between
endpoint and intermediate node
● Switching algorithms
Near-end/ far-end hear(s) echo ● Impedance mismatch
● Improper coupling
● Codec administration
Voice is too soft or too loud ● PSTN loss
● Digital loss
● Automatic Gain Control
● Conference loss plan
Clicks, pops, or stutters ● Packet loss
● Timing drift due to clocks
● Jitter
● False DTMF detection
● Silence suppression algorithms
Voice sounds muffled, distorted, ● Codec administration
or noisy
● Transducers
● Housings
● Environment
● Analog design

Some of the factors causing voice degradation are:

● Packet delay and loss
● Echo
● Transcoding
● Transcoding

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 About factors causing voice degradation

Packet delay and loss

The causes of voice degradation include:
● Packet delay (latency)
- Buffer delays
- Queuing delays in switches and routers
- Bandwidth restrictions
● Jitter (statistical average variance in end-to-end packet travel times)
● Packet loss
- Network overloaded
- Jitter buffers filled
- Echo
For a detailed discussion of packet delay and loss, see the section on "Voice quality network
requirements" in Avaya Application Solutions: IP Telephony Deployment Guide (555-245-600).

Tip:
Tip: Avaya recommends a network assessment that measures and solves latency
issues before implementing VoIP solutions. For more information, see Avaya
Application Solutions: IP Telephony Deployment Guide (555-245-600).

Echo
When you hear your own voice reflected back with a slight delay, this is echo and it happens for
the following reasons:
● Electrical -- from unbalanced impedances or cross-talk
● Acoustical -- introduced by speakerphone or room size
The total round-trip time from when a voice packet enters the network to the time it is returned to
the originator is echo path delay. In general, calls over a WAN normally have a longer echo path
delay compared to calls over a LAN.
Note:
Note: VoIP itself is not a cause of echo. However, significant amounts of delay and/or
jitter associated with VoIP can make echo perceptible that would otherwise not
be perceived.

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Echo cancellers
Echo cancellers minimize echo by comparing the original voice pattern with the received
patterns, and canceling the echo if the patterns match. However echo cancellers are not
perfect, especially:
● When the round-trip delay from the echo canceller to the echo reflection point and back is
longer than the time that the original (non-echoed) signal is buffered in the echo canceller
memory. The larger the echo canceller’s memory the longer the signal is held in the buffer,
maximizing the number of packets that the canceller can compare in the allotted time.
● During Voice Activity Detection (VAD), which monitors the level of the received signal:
- An energy drop of at least 3dB weaker than the original signal indicates echo.
- An energy level 3dB greater indicates far-end speech.
Echo cancellers do not work well over analog trunks and with speakerphones with volume
controls that permit strong signals. Although VADs can greatly conserve bandwidth,
overly-aggressive VADs can cause voice clipping and reduce voice quality. VAD administration
is done on the station screen for the particular IP phone.
Analog trunks in IP configurations need careful network balance settings to minimize echo. A
test tone of known power is sent out and the return signal measured to determine the balance
setting, which is critical for reducing echo on IP calls across these trunks.

Echo cancellation plans (TN464HP/TN2464CP circuit packs)

The following summarizes the echo cancellation plans that are available exclusively for the
TN464HP/TN2464CP circuit packs. For echo cancellation plans that are available for the
TN464GP/TN2464BP circuit packs, see Echo cancellation plans (TN464GP/TN2464BP circuit
packs) on page 205.

Echo Cancellation Configuration 1 - TN464HP/TN2464CP

This plan is the recommended choice. It has comfort noise generation and residual echo
suppression turned on. During "single talk", background noise and residual echo from the
distant station may be suppressed and replaced with comfort noise. The comfort noise
substitution reduces the perception of background noise pumping, as observed by the talker. In
this plan, the EC direction is assumed chosen to cancel the talker’s echo. Since this plan turns
on comfort noise and echo suppression, it is similar to EC plans 8 and 9 for the TN464GP/
TN2464BP circuit packs.

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 About factors causing voice degradation

Echo Cancellation Configuration 2 - TN464HP/TN2464CP

This configuration has comfort noise generation turned off and residual echo suppression
turned on. This plan may work well in a quiet background environment. In a noisy background
environment, background noise pumping/clipping may be heard by the talker. In this case, EC
direction is assumed chosen to cancel the talker’s echo. This plan my be a good compromise
for a small percent of users, who do not care for the comfort noise and prefer the silence during
the residual echo suppression periods. Since the plan turns off comfort noise and turns on
residual suppression, it is similar to EC configurations 1-6 for the TN464GP/TN2464BP circuit
packs.

Echo Cancellation Configuration 3 - TN464HP/TN2464CP

This configuration has comfort noise generation and residual echo suppression turned off. This
configuration can be a good choice only if EC plans 1 and 2 do not satisfy the user’s
preferences. Situations that require configuration 3 should be very rare. (For example, the user
does not care for the sound of comfort noise nor the pumping/clipping of background noise.)
This configuration allows the user to hear sound from the earpiece as natural as possible.
However, the user may hear residual echo during training periods, or all the time if echo is
sufficiently high and residual echo is always present. Convergence may be very slow. Since
comfort noise and residual suppression are turned off, this configuration is similar to EC
configuration 7 for the TN464GP/TN2464BP circuit packs.

Echo cancellation plans (TN464GP/TN2464BP circuit packs)

Communication Manager supports several echo cancellation (EC) plans for the TN464GP/
TN2464BP circuit packs.
Note:
Note: An EC configuration setting can be changed in real time.The change takes effect
immediately. That is, it is not necessary to busyout/release the circuit pack – you
simply change the setting on the DS1 Circuit Pack screen. This can be done
without disruption to existing calls - in fact, you immediately hear the effect of the
change.

! Important:
Important: When there are TN2302AP or TN2602AP circuit pack(s) and TN464GP/
TN2464BP circuit pack(s) being used for a call, the echo canceller on the
TN2302AP or TN2602AP is turned off and the echo canceller on the TN464GP/
TN2454BP is used instead, because it has the greater echo canceller.
The following summarizes the echo cancellation plans that are available for the TN464GP/
TN2464BP circuit packs. For echo cancellation plans that are available exclusively for the
TN464HP/TN2464CP circuit packs, see Echo cancellation plans (TN464HP/TN2464CP circuit
packs) on page 204.

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Echo Cancellation Configuration 1 – Highly Aggressive Echo Control

This configuration can control very strong echo from a distant party. It (as well as Echo
Cancellation Configuration 4) provides the most rapid convergence in detecting and correcting
echo at the beginning of a call. The initial echo fades faster than the other settings (generally in
a small fraction of a second), regardless of the loudness of the talker’s voice. EC Configurations
1 and 4 are the same except for loss. EC Configuration 1 has 6dB of loss and EC 4 has 0dB of
loss. This makes EC Configuration 1 a good choice for consistently high network signal levels.
EC Configuration 1 can cause low-volume complaints and/or complaints of clipped speech
utterances, particularly when both parties speak simultaneously (doubletalk). Because EC
Configuration 1 relies strongly on echo suppression to help control echo, “pumping” of the
distant party’s background noise may occur and lead to complaints. Prior to Communication
Manager Release 2.0, EC Configuration 1 was the default configuration.
The 6dB of loss in EC Configuration 1 is in one direction only and depends on the setting of the
EC Direction field on the DS1 Board screen. If the direction is set to inward, then the 6dB of
loss is inserted in the path out from the board towards the T1/E1 circuit. Conversely, if the
setting is outward, then the 6dB of loss is inserted into the path from the T1/E1 circuit towards
the TDM bus.

Echo Cancellation Configuration 2 – Aggressive, Stable Echo Control

This configuration is nearly identical to EC Configuration 1, except that it does not inject an
additional 6dB of signal loss, and convergence of the echo canceller is slower, but more stable
than that provided by EC Configuration 1. If EC Configuration 1 is found to diverge during
doubletalk conditions – noticeable by the sudden onset of audible echo, EC Configuration 2
should be used in place of EC Configuration 1. Because the echo canceller converges
somewhat slower, some initial echo may be noticeable at the start of a call, while the system is
“training”. EC Configuration 2 can cause complaints of clipped speech utterances, particularly
during doubletalk. Because EC Configuration 2 relies strongly on echo suppression to help
control echo, “pumping” of the distant party’s background noise may occur and lead to
complaints.

Echo Cancellation Configuration 3 – Aggressive, Very Stable Echo Control

This configuration is nearly identical to EC Configuration 2, but is even more stable. Because
the echo canceller converges somewhat slower, some initial echo may be noticeable at the start
of a call. EC Configuration 3 can cause complaints of clipped speech utterances, particularly
during doubletalk. Because EC Configuration 3 relies strongly on echo suppression to help
control echo, “pumping” of the distant party’s background noise may occur and lead to
complaints.

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 About factors causing voice degradation

Echo Cancellation Configuration 4 – Highly Aggressive Echo Control

Echo Cancellation Configuration 4 is identical to EC Configuration 1, but does not provide the
6dB loss option as described for EC Configuration 1. All other comments from EC Configuration
1 apply to EC Configuration 4. EC Configuration 4 can cause complaints of clipped speech
utterances, particularly during doubletalk. Because EC Configuration 4 strongly relies on echo
suppression to help control echo, “pumping” of the distant party’s background noise may occur,
and lead to complaints.

Echo Cancellation Configuration 5 – Very Moderate, Very Stable Echo Control

Echo Cancellation Configuration 5 departs significantly from EC Configurations 1 –4. The echo
canceller is slower to converge and is very stable once it converges. Some initial echo may be
heard at the beginning of a call. EC Configuration 5 will not, in general, lead to complaints of
clipped speech or pumping of the distant party’s background noise.

Echo Cancellation Configuration 6 – Highly Aggressive Echo Control

Echo Cancellation Configuration 6 is identical to EC Configuration 4, but reliance on the echo
suppressor to control echo is about one-half that of EC Configuration 4. As a result, EC
Configuration 6 will not clip speech as much as EC Configuration 4, but may cause somewhat
more audible echo, particularly at the start of a call. Some pumping of the distant party’s
background noise may be perceptible.

Echo Cancellation Configuration 7 – Extremely Moderate & Stable Echo Control

Echo Cancellation Configuration 7 provides very stable and transparent control of weak to
low-level echoes. For connections having audible echo at the start of a call, the residual echo
may linger for several seconds as the echo canceller converges.

Echo Cancellation Configuration 8 –Aggressive, Very Transparent Echo Control 1

Echo Cancellation Configuration 8 provides aggressive control of echo at the start of a call and
more moderate control during the call. Unlike all prior settings, EC Configuration 8 uses
“comfort noise” injection to match the actual noise level of the distant party’s speech signal. The
effect is one of echo canceller “transparency,” in which complaints of clipped speech or noise
pumping should be few to none. To many people, EC Configuration 8 and EC Configuration 9
will be indistinguishable.

Echo Cancellation Configuration 9 – Aggressive, Transparent Echo Control 2

Echo Cancellation Configuration 9 is nearly identical to EC Configuration 8, but provides
somewhat more residual echo control at a slight expense of transparency. To many people, EC
Configuration 8 and EC Configuration 9 will be indistinguishable.

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Transcoding
When IP endpoints are connected through more than one network region, it is important that
each region use the same CODEC, the circuitry that converts an audio signal into its digital
equivalent and assigns its companding properties. Packet delays occur when different CODECs
are used within the same network region. In this case the IP Media Processor acts as a gateway
translating the different CODECs, and an IP-direct (shuffled) connection is not possible.

Bandwidth
In converged networks that contain coexistent voice and data traffic, the volume of either type of
traffic is unpredictable. For example, transferring a file using the File Transfer Protocol (FTP)
can cause a sharp burst in the network traffic. At other times there may be no data in the
network.
While most data applications are insensitive to small delays, the recovery of lost and corrupted
voice packets poses a significant problem. For example, users might not really be concerned if
the reception of E-mail or files from file transfer applications is delayed by a few seconds. In a
voice call, the most important expectation is the real-time exchange of speech. To achieve this
the network resources are required for the complete duration of the call. If in any instance, there
are no resources or the network too busy to carry the voice packets, then the destination
experiences clicks, pops and stutters. Therefore, there is a continuous need for a fixed amount
of bandwidth during the call to keep it real-time and clear.

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 About Quality of Service (QoS) and voice quality administration

About Quality of Service (QoS) and

voice quality administration
Of the VoIP network issues described in the About factors causing voice degradation section,
delay is the most crucial. And because many of the other causes are highly interdependent with
delay, the primary goal is to reduce delay by improving the routing in the network, or by reducing
the processing time within the end points and the intermediate nodes.
For example, when delay is minimized:
● Jitter and electrically-induced echo abate.
● Intermediate node and jitter buffer resources are released making packet loss insignificant.
As packets move faster in the network, the resources at each node are available for the
next packet that arrives, and packets will not be dropped because of lack of resources.
Delay cannot be eliminated completely from VoIP applications, because delay includes the
inevitable processing time at the endpoints plus the transmission time. However, the delay that
is caused due to network congestion or queuing can be minimized by adjusting these Quality of
Service (QoS) parameters:
● Layer 3 QoS
- DiffServ
- RSVP
● Layer 2 QoS: 802.1p/Q
These parameters are administered on the IP Network Region screen (see Administering IP
network regions on page 220).

Layer 3 QoS
DiffServ
The Differentiated Services Code Point (DSCP) or “DiffServ” is a packet prioritization scheme
that uses the Type of Service (ToS) byte in the packet header to indicate the packet’s forwarding
class and Per Hop Behaviors (PHBs). After the packets are marked with their forwarding class,
the interior routers and gateways use this ToS byte to differentiate the treatment of packets.
A DiffServ policy must be established across the entire IP network, and the DiffServ values used
by Communication Manager and by the IP network infrastructure must be the same.
If you have a Service Level Agreement (SLA) with a service provider, the amount of traffic of
each class that you can inject into the network is limited by the SLA. The forwarding class is
directly encoded as bits in the packet header. After the packets are marked with their forwarding
class, the interior nodes (routers & gateways) can use this information to differentiate the
treatment of packets.

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RSVP
Resources ReSerVation Protocol (RSVP) can be used to lower DiffServ priorities of calls when
bandwidth is scarce. The RSVP signaling protocol transmits requests for resource reservations
to routers on the path between the sender and the receiver for the voice bearer packets only,
not the call setup or call signaling packets.

Layer 2 QoS: 802.1p/Q

802.1p is an Ethernet tagging mechanism that can instruct Ethernet switches to give priority to
voice packets.

! CAUTION:
CAUTION: If you change 802.1p/Q on the IP Network Region screen, it changes the format
of the Ethernet frames. 802.1p/Q settings in Communication Manager must
match similar settings in your network elements.
The 802.1p feature is important to the endpoint side of the network since PC-based endpoints
must prioritize audio traffic over routine data traffic.
IEEE standard 802.1Q allows you to specify both a virtual LAN (VLAN) and a frame priority at
layer 2 for LAN switches or Ethernet switches, which allows for routing based on MAC
addresses.
802.1p/Q provides for 8 priority levels and for a large number of Virtual LAN identifiers.
Interpretation of the priority is controlled by the Ethernet switch and is usually based on highest
priority first. The VLAN identifier permits segregation of traffic within Ethernet switches to
reduce traffic on individual links. 802.1p operates on the MAC layer. The switch always sends
the QoS parameter values to the IP endpoints. Attempts to change the settings by DHCP or
manually are overwritten. The IP endpoints ignore the VLAN on/off options, because turning
VLAN on requires that the capabilities be administered on the closet LAN switch nearest the IP
endpoint. VLAN tagging can be turned on manually, by DHCP, or by TFTP.
If you have varied 802.1p from LAN segment to LAN segment, then you must administer
802.1p/Q options individually for each network interface. This requires a separate network
region for each network interface.

Using VLANs
Virtual Local Area Networks (VLANs) provide security and create smaller broadcast domains by
using software to create virtually-separated subnets. The broadcast traffic from a node that is in
a VLAN goes to all the nodes that are members of this VLAN. This reduces CPU utilization and
increases security by restricting the traffic to a few nodes rather than every node on the LAN.
Any end-system that performs VLAN functions and protocols is “VLAN-aware,” although
currently very few end-systems are VLAN-aware. VLAN-unaware switches cannot handle
VLAN packets (from VLAN-aware switches), and this is why Avaya’s gateways have VLAN
configuration turned off by default.

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Avaya strongly recommends creating separate VLANs for VoIP applications. VLAN
administration is at two levels:
● Circuit pack-level administration on the IP-Interfaces screen (see Defining IP interfaces
(C-LAN, TN2302AP, or TN2602AP Load Balanced) on page 141)
● Endpoint-level administration on the IP Address Mapping screen

To administer endpoints for IP address mapping

1. Type change ip-network-map and press Enter to display the IP Address Mapping
screen.

change ip-network-map Page 1 of X

IP ADDRESS MAPPING
Emergency
Subnet 802.1Q Location
FROM IP Address (TO IP Address or Mask) Region VLAN Extension
1.__2.__3.__0 1.__2.__3.255 24 __1 ___3 ________
1.__2.__4.__4 1.__2.__4.__4 32 __2 ___0 ________
1.__2.__4.__5 1.__2.__4.__5 __ __3 ___0 ________
1.__2.__4.__6 1.__2.__4.__9 __ __4 ___4 ________
___.___.___.___ ___.___.___.___ __ ___ ____ ________
___.___.___.___ ___.___.___.___ __ ___ ____ ________
___.___.___.___ ___.___.___.___ __ ___ ____ ________
___.___.___.___ ___.___.___.___ __ ___ ____ ________
___.___.___.___ ___.___.___.___ __ ___ ____ ________
___.___.___.___ ___.___.___.___ __ ___ ____ ________
___.___.___.___ ___.___.___.___ __ ___ ____ ________
___.___.___.___ ___.___.___.___ __ ___ ____ ________
___.___.___.___ ___.___.___.___ __ ___ ____ ________

2. Complete the following fields:

Table 14: IP Address Mapping screen fields

Field Conditions/Comments

FROM IP Address Defines the starting IP address. A 32-bit address

(four decimal numbers, each in the range 0-255).
TO IP Address Defines the termination of the IP address. If this
field and the Subnet Mask field are blank when
submitted, the address in the From IP Address
field is copied into this field. A 32-bit address (four
decimal numbers, each in the range 0-255).
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Table 14: IP Address Mapping screen fields (continued)

Field Conditions/Comments

or Subnet Mask Specifies the mask to be used to obtain the

subnet work identifier from the IP address. If this
field is non-blank on submission, then:
● Mask applied to From IP Address field,
placing zeros in the non-masked rightmost
bits. This becomes the stored "From"
address.
● Mask applied to To IP Address field,
placing 1’s in the non-masked rightmost
bits. This becomes the stored "To"
address.
If this field and the To IP Address field are blank
when submitted, the address in the From IP
Address field is copied into the To IP Address
field.
Valid entries: 0-32, or blank.
Region Identifies the network region for the IP address
range. Valid entries: 1-250 (Enter the network
region number for this interface.)
VLAN Sends VLAN instructions to IP endpoints such as
IP telephones/IP Softphones. This field does not
send instructions to the PROCR, C-LAN, or
Media Processor boards.
Valid entries: 0-4095 (specifies the virtual LAN
value); n (disabled).
Emergency Location Enter a value of 1-7 digits in length for the
Extension emergency location extension. Default is blank.
(A blank entry typically would be used for an IP
softphone dialing in through PPP from
somewhere outside your network.)
If the entry on this screen differs from the value
entered in the Emergency Location Extension
field on the Station screen, then it is the
extension entered on this screen that will be sent
to the Public Safety Answering Point (PSAP).
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3. Submit the screen.

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Administering IP CODEC sets

The IP Codec Set screen allows you to specify the type of CODEC used for voice encoding and
companding, and compression/decompression. The CODECs on the IP Codec Set screen are
listed in the order of preferred use. A call across a trunk between two systems is set up to use
the first common CODEC listed.
Note:
Note: The CODEC order must be administered the same for each system of an H.323
trunk connection. The set of CODECs listed does not have to be the same, but
the order of the listed CODECs must.
The IP Codec Set screen allows you to define the CODECs and packet sizes used by each IP
network region. You can also enable or disable silence suppression for each CODEC in the set.
The screen dynamically displays the packet size in milliseconds (ms) for each CODEC in the
set, based on the number of frames you administer per packet.
Finally, you use this screen to assign the following characteristics to a codec set:
● Whether or not endpoints in the assigned network region can route FAX, modem, TTY, or
clear channel calls over IP trunks
● Which mode the system uses to route the FAX, modem, TTY, or clear channel calls
● Whether or not redundant packets will be added to the transmission for higher reliability
and quality
These characteristics must be assigned to the codec set, and the codec set must be assigned
to a network region for endpoints in that region to be able to use the capabilities established on
this screen.

! CAUTION:
CAUTION: If users are using Super G3 FAX machines as well as modems, do not assign
these FAX machines to a network region with an IP Codec set that is
modem-enabled as well as FAX-enabled. If its Codec set is enabled for both
modem and FAX signaling, a Super G3 FAX machine incorrectly tries to use the
modem transmission instead of the FAX transmission.

Therefore, assign modem endpoints to a network region that uses a

modem-enabled IP Codec set, and assign the Super G3 FAX machines to a
network region that uses a FAX-enabled IP Codec set.

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To administer an IP Codec set

1. Type change ip-codec-set set# and press Enter to open the IP Codec Set screen.
IP Codec Set screen, Page 1
change ip-codec-set 1 Page 1 of 2
IP CODEC SET
Codec Set: 1
Audio Silence Frames Packet
Codec Suppression per Pkt Size (ms)
1. G.711mu n 2 20
2. G.729 n 2 20
3. G.711mu y 2 20
4.
5.
6.
7.
Media Encryption:
1: aes
2: aea
3: 1-srtp-aescm128-hmac80

2. Complete the fields inTable 15:

Note:
Note: Use these approximate bandwidth requirements to decide which CODECs to
administer. These numbers change with packet size, and do not include layer 2
overhead. With 20 ms packets the following bandwidth is required:
● G.711 A-law — 64Kbps
● G.711 mu-law — 64Kbps (used in U.S. and Japan)
● G.729 — 8 kbps
● G.729A/B/AB — 8 kbps audio

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Table 15: IP Codec Set screen fields, page 1

Field Conditions/Comments
Audio Codec Specifies an audio CODEC. Valid values are:
● G.711A (a-law)
● G.711MU (mu-law)
● G.722- 64k
● G.722.1- 24k
● G.722.1- 32k
● G.723- 5.3k
● G.723- 6.3k
● G.726A- 32k
● G.729
● G.729A
● G.729B
● G.729AB
● SIREN14- 24k
● SIREN14- 32k
● SIREN14- 48k
● SIREN14- S48k
● SIREN14- S56k
● SIREN14- S64k
● SIREN14- S96k
Silence Enter n (recommended).
Suppression Enter y if you require silence suppression on the audio stream. This may
affect audio quality.
Frames per Pkt Specifies frames per packet. Enter a value between 1-6.
Default values are:
● 2 for G.711 Codec (frame size 10ms)
● 2 for G729 Codec (frame size 10ms)
Packet Size (ms) Automatically appears.
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Table 15: IP Codec Set screen fields, page 1 (continued)

Field Conditions/Comments
Media Encryption This field appears only if the Media Encryption over IP feature is
enabled. It specifies one of three possible options for the negotiation of
encryption. The selected option for an IP codec set applies to all codecs
defined in that set. Valid entries are:
● aes — Advanced Encryption Standard (AES), a standard
cryptographic algorithm for use by U.S. government organizations
to protect sensitive (unclassified) information. Use this option to
encrypt these links:
- Server-to-gateway (H.248)
- Gateway-to-endpoint (H.323)

● aea — Avaya Encryption Algorithm. Use this option as an

alternative to AES encryption when:
- All endpoints within a network region using this codec set must
be encrypted.
- All endpoints communicating between two network regions and
administered to use this codec set must be encrypted.
● 1-srtp-aescm128-hmac80 — Encrypted/Authenticated RTP with
80-bit authentication tag
● 2-srtp-aescm128-hmac32 — Encrypted/Authenticated RTP with
32-bit authentication tag
● 3-srtp-aescm128-hmac80-unauth — Encrypted RTP but not
authenticated
● 4-srtp-aescm128-hmac32-unauth — Encrypted RTP but not
authenticated
● 5-srtp-aescm128-hmac80-unenc — Authenticated RTP with
80-bit authentication tag but not encrypted
● 6-srtp-aescm128-hmac32-unenc — Authenticated RTP with
32-bit authentication tag but not encrypted
● 7-srtp-aescm128-hmac80-unenc-unauth — Unencrypted/
Unauthenticated RTP
● 8-srtp-aescm128-hmac32-unenc-unauth — Unencrypted/
Unauthenticated RTP

● none — Media stream is unencrypted. This is the default setting.

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3. Press Next Page to display page 2 of the screen.

Page 2 appears.
IP-Codec-Set, page 2
change ip-codec-set n Page 2 of x

IP Codec Set

Allow Direct-IP Multimedia? y

Maximum Bandwidth Per Call for Direct-IP Multimedia: 256:Kbits

Mode Redundancy

FAX relay 0

Modem off 0

TDD/TTY us 0

Clear-channel n 0

4. Complete the fields as described in the following table.

Table 16: IP Codec Set screen fields, page 2

Field Conditions/Comments
All Direct-IP Enter y to allow direct multimedia via the following codecs:
Multimedia? ● H.261
● H.263
● H.264 (video)
● H.224
H.224.1 (data, far-end camera control).
Maximum This field displays only when Allow Direct-IP Multimedia is y.
Bandwidth Per Enter the unit of measure, kbits or mbits, corresponding to the
Call for numerical value entered for the bandwidth limitation. Default is
Direct-IP kbits
Multimedia
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Table 16: IP Codec Set screen fields, page 2 (continued)

Field Conditions/Comments
FAX Mode Specifies the mode for fax calls. Valid values are:
● off
Turn off special fax handling when using this codec set. In
this case, the fax is treated like an ordinary voice call.
With a codec set that uses G.711, this setting is required to
send faxes to non-Avaya systems that do not support T.38
fax.
● relay
For users in regions using this codec, use Avaya relay
mode for fax transmissions over IP network facilities. This
is the default for new installations and upgrades to
Communication Manager R2.1.
● pass-through
For users in regions using this codec, use pass-through
mode for fax transmissions over IP network facilities. This
mode uses G.711-like encoding.
● t.38-standard
For users in regions using this codec, use T.38 standard
signaling for fax transmissions over IP network facilities.
Modem Mode Specifies the mode for modem calls. Valid values are:
● off
Turn off special modem handling when using this codec
set. In this case, the modem transmission is treated like an
ordinary voice call. This is the default for new installations
and upgrades to Communication Manager R2.1.
With a codec set that uses G.711, this setting is required to
send modem calls to non-Avaya systems.
● relay
For users in regions using this codec, use relay mode for
modem transmissions over IP network facilities.
● pass-through
For users in regions using this codec, use pass-through
mode for modem transmissions over IP network facilities.
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Table 16: IP Codec Set screen fields, page 2 (continued)

Field Conditions/Comments
TDD/TTY Mode Specifies the mode for TDD/TTY calls. Valid values are:
● off
Turn off special TTY handling when using this codec set. In
this case, the TTY transmission is treated like an ordinary
voice call.
With a codec set that uses G.711, this setting is required to
send TTY calls to non-Avaya systems. However, there may
be errors in character transmissions.
● US
For users in regions using this codec, use U.S. Baudot
45.45 mode for TTY transmissions over IP network
facilities. This is the default for new installations and
upgrades to Communication Manager R2.1.
● UK
For users in regions using this codec, use U.K. Baudot 50
mode for TTY transmissions over IP network facilities.
● pass-through
For users in regions using this codec, use pass-through
mode for TTY transmissions over IP network facilities.
Clear Channel ● "y"es allows 64 kbps clear channel data calls for this
codec set.
● "n"o disallows 64 kbps clear channel data calls for this
codec set.
Redundancy For each type of call (TTY, fax, modem, or clear channel) that
does not use pass-through mode, enter the number of
duplicated packets, from 0 to 3, that the system sends with each
primary packet in the call. 0 means that you do not want to send
duplicated packets.
For any call types for which you selected pass-through or clear
channel modes, you can enter 0 or 1 only. That is, for
pass-through and clear channel modes, the maximum number
of duplicated packets that the system can send with each
primary packet is one.
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6. Type list ip-codec-set and press Enter to list all CODEC sets on the CODEC Set
screen.
Codec Sets screen
list ip-codec-set Page 1 of 1

Codec Sets
Codec Codec 1 Codec 2 Codec 3 Codec 4 Codec 5
Set
1. G.711MU G.729
2. G.729B G.729 G.711MU G.711A

7. Review your CODEC sets.

Administering IP network regions

Network regions enable you to group IP endpoints and/or VoIP and signaling resources that
share the same characteristics. Signaling resources include Media Processor and C-LAN circuit
packs. In this context, IP endpoint refers to IP stations, IP trunks, and G350 and G700 Media
Gateways. The characteristics that can be defined for these IP endpoints and resources are:
● Audio Parameters
- Codec Set
- UDP port Range
- Enabling Direct IP-IP connections
- Enabling Hairpinning
● Quality of Service Parameters:
- Diffserv settings
● Call Control per-hop behavior (PHB)
● VoIP Media PHB
- 802.1p/Q settings
● Call Control 802.1p priority
● VoIP Media 802.1p priority
● VLAN ID
- Better than Best Effort (BBE) PHB
- RTCP settings
- RSVP settings
- Location

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● WAN bandwidth limitations

- Call Admission control - Bandwidth Limitation (CAC-BL)
- Inter-Gateway Alternate Routing (IGAR)
The following sections tell you about:
● Defining an IP network region
● Setting up Inter-Gateway Alternate Routing (IGAR)
● Setting up Dial Plan Transparency
● Network Region Wizard (NRW)
● Manually interconnecting the network regions
● Administering inter-network region connections
● Pair-wise administration of IGAR between network regions
● Reviewing the network region administration
Note:
Note: For more information on using network regions, with examples, see the
application note Network Regions for Avaya MultiVantage™ Solutions - A
Tutorial, which is available at: http://www.avaya.com/gcm/master-usa/en-us/
resource/assets/applicationnotes/advantages_of_implem.pdf (requires Adobe
Reader). For more information on configuring network regions in Avaya
Communication Manager, see the application note Avaya Communication
Manager Network Region Configuration Guide, which is available at: http://
www.avaya.com/master-usa/en-us/resource/assets/applicationnotes/
netw-region-tutorial.pdf (requires Adobe Reader).

Defining an IP network region

! CAUTION:
CAUTION: Never define a network region to span a WAN link.
Avaya strongly recommends that you accept the default values for the following screen.

To define an IP network region

1. Type change ip-network-region to open the IP Network Region screen.

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IP Network Region screen

change ip-network-region 1 page 1 of 19

IP NETWORK REGION
Region: 1
Location: Authoritative Domain:
Name:
Intra-region IP-IP Direct Audio: no
AUDIO PARAMETERS Inter-region IP-IP Direct Audio: no
Codec Set: 1 IP Audio Hairpinning? n
UDP Port Min: 2048
UDP Port Max: 3049 RTCP Reporting Enabled? y
RTCP MONITOR SERVER PARAMETERS
DIFFSERV/TOS PARAMETERS Use Default Server Parameters? n
Call Control PHB Value: 46 Server IP Address: . . .
Audio PHB Value: 46 Server Port: 5005
802.1P/Q PARAMETERS RTCP Report Period(secs): 5
Call Control 802.1p Priority: 6
Audio 802.1p Priority: 6
Video 802.1p Priority: 7
AUDIO RESOURCE RESERVATION PARAMETERS
H.323 IP ENDPOINTS RSVP Enabled? y
H.323 Link Bounce Recovery? y RSVP Refresh Rate(secs) 15
Idle Traffic Interval (sec): 20 Retry upon RSVP Failure Enabled? y
Keep-Alive Interval (sec): 6 RSVP Profile:
Keep-Alive Count: 5 RSVP unreserved (BBE) PHB Value: 40

2. Complete the fields using the information in Table 17: IP Network Region field
descriptions on page 222.

Table 17: IP Network Region field descriptions

Field Descriptions/Comments

Region Network Region number, 1–250.

Location Blank or 1–250. Enter the number for the location for the IP
network region. The IP endpoint uses this as its location number.
This applies to IP telephones and IP Softphones.
1-44 (DEFINITY CSI)
1-250 (S8300, S8500, S8700, S8710, S8720 Media Servers)
blank The location is obtained from the cabinet containing the
C-LAN that the endpoint registered through, or the media gateway
containing the Internal Call Controller or Local Survivable
Processor on an Avaya S8300 Media Server through which the
endpoint registered. This applies to IP telephones and IP
Softphones. Traditional cabinets, Remote Offices, and the Avaya
S8300 Media Server all have their locations administered on their
corresponding screens.
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Table 17: IP Network Region field descriptions (continued)

Field Descriptions/Comments

Name Describes the region. Enter a character string up to 20 characters.

Home Domain The network domain of the media server.
AUDIO PARAMETERS
Codec Set Specifies the CODEC set assigned to a region. Enter a value
between 1-7 (default is 1).
Note:
Note: CODEC sets are administered on the CODEC Set
screen (see Administering IP CODEC sets).
UDP Port-Min Specifies the lowest port number to be used for audio packets.
Enter a value between 2-65406 (default is 2048).
Note:
Note: This number must be twice the number of calls that
you want to support plus one, must start with an
even number, and must be consecutive. Minimum
range is 128 ports.

! CAUTION:
CAUTION: Avoid the range of “well-known” or IETF-assigned
ports. Do not use ports below 1024.
UDP Port-Max Specifies the highest port number to be used for audio packets.
Enter a value between 130-65535 (default is 65535).
! CAUTION:
CAUTION: Avoid the range of well-known or IETF-assigned
ports. Do not use ports below 1024.
DIFFSERVE/TOS PARAMETERS
Call Control PHB Value The decimal equivalent of the Call Control PHB value. Enter a
value between 0-63.
● Use PHB 46 for expedited forwarding of packets.
● Use PHB 46 for audio for legacy systems that only support
IPv4 Type-of-Service, which correlates to the older ToS
critical setting.
● Use PHB 46 if you have negotiated a Call Control PHB
value in your SLA with your Service Provider.
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Table 17: IP Network Region field descriptions (continued)

Field Descriptions/Comments

Audio PHB Value The decimal equivalent of the VoIP Media PHB value. Enter a
value between 0-63:
● Use PHB 46 for expedited forwarding of packets.
● Use PHB 46 for audio for legacy systems that only support
IPv4 Type-of-Service, which correlates to the older ToS
critical setting.
802.1p/Q PARAMETERS
Call Control 802.1p Specifies the 802.1p priority value, and appears only if the 802.1p/
Priority Q Enabled field is y. The valid range is 0–7. Avaya recommends 6
(high). See “Caution” below this table.
Audio 802.1p Priority Specifies the 802.1p priority value, and appears only if the 802.1p/
Q Enabled field is y. The valid range is 0–7. Avaya recommends 6
(high). See “Caution” below this table.
Video 802.1p Priority Specifies the Video 802.1p priority value, and appears only if the
802.1p/Q Enabled field is y. The valid range is 0–7.
H.323 IP ENDPOINTS
H.323 Link Bounce y/n Specifies whether to enable H.323 Link Bounce Recovery
Recovery feature for this network region.
Idle Traffic Interval (sec) 5-7200 Enter the maximum traffic idle time in seconds. Default is
20.
Keep-Alive Interval (sec) 1-120 Specify the interval between KA retransmissions in seconds.
Default is 5.
Keep-Alive Count 1-20 Specify the number of retries if no ACK is received. Default is
5.
Intra-region IP-IP Direct y/n Enter y to save on bandwidth resources and improve sound
Audio quality of voice over IP transmissions.
Enter native (NAT) if the IP address from which audio is to be
received for direct IP-to-IP connections within the region is that of
the IP telephone/IP Softphone itself (without being translated by
NAT). IP phones must be configured behind a NAT device before
this entry is enabled.
Enter translated (NAT) if the IP address from which audio is to be
received for direct IP-to-IP connections within the region is to be
the one with which a NAT device replaces the native address. IP
phones must be configured behind a NAT device before this entry
is enabled.
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Table 17: IP Network Region field descriptions (continued)

Field Descriptions/Comments

Inter-region IP-IP Direct y/n Enter y to save on bandwidth resources and improve sound
Audio quality of voice over IP transmissions.
Enter translated (NAT) if the IP address from which audio is to be
received for direct IP-to-IP connections between regions is to be
the one with which a NAT device replaces the native address. IP
phones must be configured behind a NAT device before this entry
is enabled.
Enter native (NAT) if the IP address from which audio is to be
received for direct IP-to-IP connections between regions is that of
the telephone itself (without being translated by NAT). IP phones
must be configured behind a NAT device before this entry is
enabled.
IP Audio Hairpinning? y/n Enter y to allow IP endpoints to be connected through the
media server’s IP circuit pack in IP format, without first going
through the Avaya TDM bus.
RTCP Reporting Specifies whether you want to enable RTCP reporting. If this field
Enabled? is set to y, then the RTCP Monitor Server Parameters fields
appear.
RTCP MONITOR SERVER PARAMETERs
Use Default Server This field only appears when the RTCP Reporting Enabled field
Parameters? is set to y.
● Enter y to use the default RTCP Monitor server parameters
as defined on the IP Options System Parameters screen. If
set to y, you must complete the Default Server IP Address
field on the IP Options System Parameters screen
(change system-parameters ip-options).
● If you enter n, you need to complete the Server IP
Address, Server Port, and RTCP Report Period fields.
Server IP Address This field only appears when the Use Default Server Address
field is set to n and the RTCP Enabled field is set to y. Enter the IP
address for the RTCP Monitor server in nnn.nnn.nnn.nnn format,
where nnn=0-255.
Server Port This field only appears when the Use Default Server Address
field is set to n and the RTCP Enabled field is set to y. Enter the
port (1-65535) for the RTCP Monitor server.
RTCP Report Period This field only appears when the Use Default Server Address
(secs) field is set to n and the and the RTCP Enabled field is set to y.
Range of values is 5-30 (seconds).
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Table 17: IP Network Region field descriptions (continued)

Field Descriptions/Comments

AUDIO RESOURCE RESERVATION PARAMETERS

RSVP Enabled? y/n Specifies whether or not you want to enable RSVP.
RSVP Refresh Rate (sec) Enter the RSVP refresh rate in seconds (1-99). This field only
appears if the RSVP Enabled field is set to y.
Retry upon RSVP Failure Specifies whether to enable retries when RSVP fails (y/n). This
Enabled field only appears if the RSVP Enabled field is set to y.
RSVP Profile This field only appears if the RSVP Enabled field is set to y. You
set this field to what you have configured on your network
● guaranteed-service places a limit on the end-to-end
queuing delay from the sender tot he receiver. This is the
most appropriate setting for VoIP applications.
● controlled-load (a subset of guaranteed-service) provides
for a traffic specifier but not the end-to-end queuing delay.
RSVP unreserved (BBE) Provides scalable service discrimination in the Internet without
PHB Value per-flow state and signaling at every hop. Enter the decimal
equivalent of the DiffServ Audio PHB value, 0-63. This field only
appears if the RSVP Enabled field is set to y.
Note: The "per-flow state and signaling" is RSVP, and when RSVP
is not successful, the BBE value is used to discriminate between
Best Effort and voice traffic that has attempted to get an RSVP
reservation, but failed.
5 of 5

! CAUTION:
CAUTION: If you change 802.1p/Q on the IP Network Region screen, it changes the format
of the Ethernet frames. 802.1p/Q settings in Communication Manager must
match those in all of the interfacing elements in your data network.
3. Press Enter to save the changes.

226 Administration for Network Connectivity for Avaya Communication Manager

 About Quality of Service (QoS) and voice quality administration

Call Admission Control

Call Admission Control (CAC) is a feature that allows a limit to be set on the bandwidth
consumption or number of calls between network regions.
Note:
Note: If SRTP media encryption is used for SIP and H.323 calls, CAC must be adjusted
for the additional overhead imposed by the authentication process. SRTP
authentication can add 4 (HMAC32) or 10 (HMAC80) bytes to each packet.
The primary use of this feature is to prevent WAN links from being overloaded with too many
calls. This is done by setting either a bandwidth limit or a number-of-calls limit between network
regions, as follows:
● Bandwidth consumption is calculated using the methodology explained in the Avaya
Application Solutions: IP Telephony Deployment Guide (555-245-600).
● The L2 overhead is assumed to be 7 bytes, which is the most common L2 overhead size
for WAN protocols.
● The calculated bandwidth consumption is rounded up to the nearest whole number.
● The calculated bandwidth consumption takes into account the actual IP CODEC being
used for each individual call. It does not assume that all calls use the same CODEC.
● If the administrator chooses not to have the media server calculate the bandwidth
consumption, he/she may enter in a manual limit for the number of calls. However, this
manually entered limit is adhered to regardless of the codec being used. Therefore, the
administrator must be certain that either all calls use the same CODEC, or that the manual
limit takes into account the highest possible bandwidth consumption for the specified
inter-region CODEC set.
● If a call between two network regions traverses an intervening network region (for
example, a call from 1 to 3 actually goes 1 to 2 to 3), then the call server keeps track of the
bandwidth consumed across both inter-region connections, that is, both 1 to 2 and 2 to 3.

ip-codec-set 1: G.711 no SS 20ms

ip-codec-set 2: G.729 no SS 20ms

No limit
512k Region 1

Region 2 Region 5
1M 25 calls

Region 3 Region 4

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The figure above shows a simple hub-spoke network region topology. The WAN link between
network regions 1 and 2 has 512kbps reserved for VoIP. The WAN link between network
regions 1 and 3 has 1Mbps reserved for VoIP. The link between network regions 1 and 4 is one
where the 7-byte L2 overhead assumption would not hold, such as an MPLS or VPN link. In this
case, the administration is such that all inter-region calls terminating in region 4 use the G.729
codec (with no SS at 20ms).
Therefore, it is feasible to set a limit on the number of inter-region calls to region 4, knowing
exactly how much bandwidth that CODEC consumes (with the MPLS or VPN overhead added).
Finally, the link between network regions 1 and 5 requires no limit, either because there are very
few endpoints in region 5 or because there is practically unlimited bandwidth to region 5.

228 Administration for Network Connectivity for Avaya Communication Manager

 About Quality of Service (QoS) and voice quality administration

The corresponding IP Network Region screens for each network region are shown below.

Configure inter-region connectivity for network region 1.

change ip-network-region 1 Page 3 of 19

Inter Network Region Connection Management

src dst codec direct Dynamic CAC

rgn rgn set WAN WAN-BW-limits Intervening-regions Gateway IGAR
1 1 1
1 2 2 y 512:Kbits
1 3 2 y 1:Mbits
1 4 2 y 25:Calls
1 5 2 y :NoLimit

- Connectivity from network region 1 to all the other regions is configured per the diagram
above.
- All the inter-region connections use the WAN codec set.

Configure inter-region connectivity for network region 2.

change ip-network-region 2 Page 3 of 19

Inter Network Region Connection Management

src dst codec direct Dynamic CAC

rgn rgn set WAN WAN-BW-limits Intervening-regions Gateway IGAR
2 1 2 y 512:Kbits
2 2 1
2 3 2 n 1
2 4 2 n 1
2 5 2 n 1

- Network region 2 connects to regions 3, 4, and 5 via intervening region 1.

- Communication Manager keeps track of the bandwidth or call limits between all adjacent
regions.

Configure inter-region connectivity for network region 3.

change ip-network-region 3 Page 3 of 19

Inter Network Region Connection Management

src dst codec direct Dynamic CAC

rgn rgn set WAN WAN-BW-limits Intervening-regions Gateway IGAR
3 1 2 y 1:Mbits
3 2 2 n 1
3 3 1
3 4 2 n 1
3 5 2 n 1

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The corresponding IP Network Region screens for each network region are shown below.

Configure inter-region connectivity for network region 4.

change ip-network-region 4 Page 3 of 19

Inter Network Region Connection Management

src dst codec direct Dynamic CAC

rgn rgn set WAN WAN-BW-limits Intervening-regions Gateway IGAR
4 1 2 y 25:Calls
4 2 2 n 1
4 3 2 n 1
4 4 1
4 5 2 n 1

Configure inter-region connectivity for network region 5.

change ip-network-region 5 Page 3 of 19

Inter Network Region Connection Management

src dst codec direct Dynamic CAC

rgn rgn set WAN WAN-BW-limits Intervening-regions Gateway IGAR
5 1 2 y :NoLimit
5 2 2 n 1
5 3 2 n 1
5 4 2 n 1
5 5 1

Setting up Inter-Gateway Alternate Routing (IGAR)

Whenever Communication Manager needs an inter-gateway connection and sufficient IP
bandwidth is not available, it attempts to substitute a trunk connection for the IP connection.
This happens in any of a large variety of scenarios, including the following examples:
● A party in one Network Region (NR) calls a party in another NR, or
● A station in one NR bridges onto a call appearance of a station in another NR, or
● An incoming trunk in one NR routes to a hunt group with agents in another NR, or
● An announcement or music source from one NR must be played to a party in another NR.

230 Administration for Network Connectivity for Avaya Communication Manager

 About Quality of Service (QoS) and voice quality administration

Communication Manager software automatically attempts to use a trunk for inter-region voice
bearer connection when all of the following five conditions are met:
● An inter-gateway connection is needed.
● IGAR has been “triggered” by one (or more) of the following conditions:
- The administered bandwidth limit between two NRs has been exhausted, or
- The VoIP resources between two PN/MGs have been exhausted, or
- IGAR has been “forced” between two NRs, or
- The codec set is set to pstn.
● IGAR is enabled for the NRs associated with each end of the call.
● The System Parameter Enable Inter-Gateway Alternate Routing is set to ‘y’. See
Figure 34.
● The number of trunks used by IGAR in each of the two NRs has not reached the limit
administered for that NR.
A Trunk IGC is established using ARS to route a trunk call from one NR to the IGAR LDN
Extension administered for other NR. Because the Trunk IGC is independent of the actual call
being placed, Communication Manager can originate the IGC in either direction — that is, from
the calling party’s NR to the NR of the called party, or vice versa. However, because some
customers wish to use Facility Restriction Levels or Toll Restriction to determine who gets
access to IGAR resources during a WAN outage, the calling user is considered the originator of
the Trunk IGC for the purposes of authorization (for example, FRL checking) and routing (for
example, determining which Location-specific ARS and Toll tables to use). However, if the
outgoing trunk group is administered to send the Calling Number, the IGAR Extension in the
originating NR is used to create this number using the appropriate administration (performed on
the public/unknown or private numbering screen).
The following are examples of certain failure conditions and how Communication Manager
handles them:
● On a direct call, the call proceeds to the first coverage point of the unreachable called
endpoint, or if no coverage path is assigned, busy tone is played to the calling party.
● If the unreachable endpoint is being accessed through a coverage path, it is skipped.
● If the unreachable endpoint is the next available agent in a hunt group, that agent is
considered unavailable, and the system tries to terminate to another agent using the
administered group type (Circular, Percent Allocation Distribution, etc.).

Setting up Dial Plan Transparency

Dial Plan Transparency (DPT) preserves the dial plan when a media gateway registers with an
LSP or when a port network registers with an ESS due to the loss of contact with the primary
controller. In this scenario, DPT establishes a trunk call and reroutes the call over the PSTN to
connect endpoints that can no longer connect over the corporate IP network.

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DPT does not need to be activated in the license file. DPT is available as a standard feature for
Communication Manager Release 4.0 and later.
DPT is similar to IGAR in that they both provide alternate routing of calls when normal
connections are not available. A major difference between DPT and IGAR is that DPT routes
calls between endpoints controlled by two independent servers while IGAR routes calls
between endpoints controlled by a single server. The DPT and IGAR features are independent
of each other but can be activated at the same time.
Limitations of DPT include the following:
● DPT only handles IP network connectivity failures between network regions.
● Because DPT calls are trunk calls, many station features are not supported.
● For Release 4.0, DPT applies only to endpoints that are dialed directly. Redirected calls or
calls to groups cannot be routed by DPT.
● DPT cannot reroute calls involving a SIP endpoint that has lost registration with its Home
SES.
● Failover strategies for gateways and port networks, and alternate gatekeeper lists for IP
stations, must be kept consistent for DPT to work.

Use the following procedure to administer DPT

1. Enable DPT on the Feature-Related System Parameters screen
a. set Enable Dial Plan Transparency in Survivable Mode to y.
b. Set COR to Use for DPT to either station or unrestricted.
If set to station, the Facility Restriction Level (FRL) of the calling station determines
whether that station is permitted to make a trunk call and if so, which trunks it is eligible to
access. If set to unrestricted, the first available trunk preference pointed to by ARS
routing is used.

232 Administration for Network Connectivity for Avaya Communication Manager

 About Quality of Service (QoS) and voice quality administration

Figure 32: Enabling DPT on the System Features screen

change system -parameters features Page 5 of x
FEATURE-RELATED SYSTEM PARAMETERS

SYSTEM PRINTER PARAMETERS

Endpoint: 24099 Lines Per Page: 40

SYSTEM-WIDE PARAMETERS
Switch Name: Mercury
Emergency Extension Forwarding (min): 4
Enable Inter-Gateway alternate Routing? n
Enable Dial Plan Tranparency in Survivable Mode? y
COR to Use for DPT: station

MALICIOUS CALL TRACE PARAMETERS

Apply MCT Warning Tone? n MCT Voice Recorder Trunk Group:
Delay SEnding RELease (seconds)? 0
SEND ALL CALLS OPTIONS
Send All Calls Applies to: extension Auto Inspect on Send All Calls? n

UNIVERSAL CALL ID
Create Universal Call ID (UCID)? y UCID Network Node ID: 10

2. Enable DPT for the appropriate Network Regions. On page 2 of the IP Network Region
screen, set the Dial Plan Transparency in Survivable Mode field to y.

Figure 33: Enabling DPT on the Network Region screen

change ip-network-region 1 Page 2 of 19
IP NETWORK REGION

INTER-GATEWAY ALTERNATE ROUTING / DIAL PLAN TRANSPARENCY

Incoming LDN Extension: 852-3999
Conversion To Full Public Number - Delete: 0 Insert: +1732________
Maximum Number of Trunks To Use for IGAR: 23
Dial Plan Transparency in Survivable Mode? y

BACKUP SERVERS(IN PRIORITY ORDER) H.323 SECURITY PROFILES

1 ________________ 1 challenge
2 ________________ 2
3 ________________ 3
4 ________________ 4
5 ________________
6 ________________ Allow SIP URI Conversion? y

TCP SIGNALING LINK ESTABLISHMENT FOR AVAYA H.323 ENDPOINTS

Near End Establishes TCP Signaling Socket? n
Near End TCP Port Min: 61440
Near End TCP Port Max: 61444

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3. If not already completed for IGAR, allocate on incoming DID / LDN extension for incoming
DPT calls. This extension can be shared by IGAR and DPT.
4. As for IGAR, ensure that a sufficient number of trunks are available. You do not need to set
the maximum number of trunks for DPT.
5. Use existing routing techniques to ensure that an outgoing DPT call from a given Network
Region has access to an outgoing trunk. The outgoing trunk need not be in the same
Network Region as the calling endpoint, as long as the endpoint and trunk Network Regions
are interconnected.

Network Region Wizard (NRW)

The Avaya Network Region Wizard (NRW) is a browser-based wizard that is available on Avaya
Media Servers running Communication Manager 2.1 or higher software. The NWR supports
IGAR along with prior support for CAC and codec set selection for inter-connected region pairs.
For any system that has several network regions, the use of the wizard can save time for the
software specialist or business partner provisioning the system, as well as help to configure the
system for optimum IP performance.
The NRW guides you through the steps required to define network regions and set all
necessary parameters through a simplified, task-oriented interface. The purpose of the NRW is
to simplify and expedite the provisioning of multiple IP network regions, including Call
Admission Control via Bandwidth Limits (CAC-BL) for large distributed single-server systems
that have several network regions. The NRW is especially valuable for provisioning systems
with dozens or hundreds of network regions, for which administration using the System Access
Terminal (SAT) scales poorly.
NRW provisioning tasks include:
● Specification and assignment of codec sets to high-bandwidth (intra-region) LANs and
lower-bandwidth (inter-region) WANs
● Configuration of IP network regions, including all intra-region settings, as well as
inter-region administration of CAC-BL for inter-region links
● Ongoing network region administration by the customer as well as by Avaya technicians
and Business Partners to accommodate changes in the customer network following
cutover
● Assignment of VoIP resources (C-LANs, TN2302/TN2602 circuit packs, Media
Gateways), and endpoints to IP network regions.
The NRW simplifies and expedites network region provisioning in several ways:
● NRW uses algorithms and heuristics based on graph theory to greatly reduce the repetitive
manual entry required by the SAT to configure codecs, and CAC-BL for inter-region links.
With the SAT, the number of inter-region links that need to be configured by the user does
not scale well; with the NRW, the number of region pairs that require manual
administration will increase linearly with the number of regions.

234 Administration for Network Connectivity for Avaya Communication Manager

 About Quality of Service (QoS) and voice quality administration

● NRW provides templates of widely applicable default values for codec sets and
intra-region parameter settings. Users have the ability to customize these templates
with their own default values.
● NRW runs on any Internet browser supported by the Avaya Integrated Management (IM)
product line, and takes advantage of browser capabilities to offer user-friendly prompting
and context-sensitive online help.
The NRW has its own Job Aid and worksheet (one of Avaya’s wizard tools that are available
from http://support.avaya.com/avayaiw), and is a standard IM support tool delivered with every
Linux-based Communication Manager system.

Manually interconnecting the network regions

Use the Enable Inter-Gateway Alternate Routing? field on the Feature-Related System
Parameters screen to enable IGAR on a system-wide basis. Using this parameter, IGAR can be
quickly disabled without changing/removing other feature administration associated with IGAR.
This parameter is included under the System-Wide Parameters, as shown in Figure 34.

Figure 34: IGAR system parameter

change system-parameters features Page 5 of 14
FEATURE-RELATED SYSTEM PARAMETERS

SYSTEM PRINTER PARAMETERS

Endpoint: SYS_PRNT Lines Per Page: 60

SYSTEM-WIDE PARAMETERS
Switch Name: Skipper
Emergency Extension Forwarding (min): 10
Enable Inter-Gateway Alternate Routing? n
Enable Dial Plan Transparency in Survivable Mode? y
COR to Use for DPT: station

MALICIOUS CALL TRACE PARAMETERS

Apply MCT Warning Tone? y MCT Voice Recorder Trunk Group: 256
Delay Sending RELease (seconds)? 0
SEND ALL CALLS OPTIONS
Send All Calls Applies to: station Auto Inspect on Send All Calls? n

UNIVERSAL CALL ID
Create Universal Call ID (UCID)? y UCID Network Node ID: 10040

If TN799DP (C-LAN) and TN2302AP (IP Media Processor) resources are shared between/
among administered network regions, you must define which regions communicate with which
other regions and with what CODEC set on the Inter-Network Region Connection
Management screen (change/display/status ip-network-region).

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Note:
Note: You cannot connect IP endpoints in different network regions or communicate
between/among network regions unless you specify the CODEC set on this
screen.
You can also specify for the Call Admission Control - Bandwidth Limitation feature:
● Whether regions are directly connected or indirectly connected through intermediate
regions.
● Bandwidth limits for IP bearer traffic between two regions using either a maximum bit rate
or number of calls.
When a bandwidth limit is reached, additional IP calls between those regions are diverted to
other channels or blocked.
Typically, the bandwidth limit is specified as the number of calls when the codec set
administered across a WAN link contains a single codec. When the codec set administered
across a WAN link contains multiple codecs, the bandwidth limit is usually specified as a
bit-rate. For regions connected across a LAN, the normal bandwidth limit setting is nolimit.
For more information on using network regions, with examples, see the application note
Network Regions for Avaya MultiVantage™ Solutions - A Tutorial, which is available at: http://
www.avaya.com/gcm/master-usa/en-us/resource/assets/applicationnotes/
advantages_of_implem.pdf (requires Adobe Reader). For more information on configuring
network regions in Avaya Communication Manager, see the application note Avaya
Communication Manager Network Region Configuration Guide, which is available at: http://
www.avaya.com/master-usa/en-us/resource/assets/applicationnotes/netw-region-tutorial.pdf
(requires Adobe Reader). For information on using the Network Region Wizard, see the
Network Region Job Aid, 14-300283, which is available at http://www.avaya.com/support.

Administering inter-network region connections

An Alternate Routing Extension field has been added to the second page of the IP Network
Region screen. This unassigned extension (up to 7 digits long), together with two other fields
are required for each network region in order to route the bearer portion of the IGAR call. The
following must be performed:
● If IGAR is enabled for any row on pages 3 through 19, then the user shall be:
- Required to enter an IGAR extension before submitting the screen
- Blocked from blanking out a previously administered IGAR extension
● If IGAR is disabled by the System Parameter, the customer is warned if any of these fields
are updated.
The warning is "WARNING: The IGAR System Parameter is disabled."
Type change ip-network-region # and press Enter to open the Inter Network Region
Connection Management screen. Go to Page 2.

236 Administration for Network Connectivity for Avaya Communication Manager

 About Quality of Service (QoS) and voice quality administration

Figure 35: Alternate Routing Extension field

change ip-network-region 1 Page 2 of 19
IP NETWORK REGION

INTER-GATEWAY ALTERNATE ROUTING / DIAL PLAN TRANSPARENCY

Incoming LDN Extension: 852-3999
Conversion To Full Public Number - Delete: 0 Insert: +1732________
Maximum Number of Trunks To Use for IGAR: 23
Dial Plan Transparency in Survivable Mode? n

BACKUP SERVERS(IN PRIORITY ORDER) H.323 SECURITY PROFILES

1 ________________ 1 challenge
2 ________________ 2
3 ________________ 3
4 ________________ 4
5 ________________
6 ________________ Allow SIP URI Conversion? y

TCP SIGNALING LINK ESTABLISHMENT FOR AVAYA H.323 ENDPOINTS

Near End Establishes TCP Signaling Socket? n
Near End TCP Port Min: 61440
Near End TCP Port Max: 61444

Pair-wise administration of IGAR between network regions

An IGAR column has been added to the IP Network Region screen to allow pair-wise
configuration of IGAR between network regions. If the field is set to “y” the IGAR capability is
enabled between the specific network region pair. If it is set to “n” the IGAR capability is
disabled between the network region pair.
The following screen validations must be performed:
● If no IGAR Extension is administered on page 2 of the IP Network Region screen, the
user is blocked from submitting the screen, if any network region pair has IGAR enabled.
● If IGAR is disabled using the System Parameter, the customer will be warned, if IGAR is
enabled for any network region pair.
The warning is “WARNING: The IGAR System Parameter is disabled.”
Normally, the administration between Network Region pairs would have a codec set identified
for compressing voice across the IP WAN. Only if bandwidth in the IP WAN is exceeded, and
the IGAR field is set to “y”, would the voice bearer be routed across an alternate trunk facility.
However, under some conditions you may wish to force all calls to the PSTN.
The “forced” option can be used during initial installation to verify the alternative PSTN facility
selected for a Network Region pair. This option may also be used to move traffic off of the IP
WAN temporarily, if an edge router is having problems, or an edge router needs to be replaced
between a Network Region pair.

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When the codec set type is set to “pstn” the following fields are defaulted:
● IGAR field defaults to “y”. Options: f(orced), n(o), y(es).
This field must be defaulted to “y” because the Alternate Trunk Facility is the only means of
routing the voice bearer portion of the call.
● When the codec set is set to “pstn” the following fields are hidden:
- Direct-WAN
- WAN-BW Limits, and
- Intervening Regions
When the codec set is not “pstn” and not blank, the IGAR field is defaulted to “n”.
A “f(orced)” option is supported in the IGAR column in addition to the options “n(o)” and
“y(es)”.

Figure 36: Inter network region connection management

change ip-network-region 3 Page 3 of 19

Inter Network Region Connection Management

src dst codec direct Audio Video Dyn

rgn rgn set WAN WAN-BW Limits WAN-BW Limits Intervening-Regions CAC IGAR
3 1 1___ y 256:Kbits f
3 2 1___ n 1__ ___ ___ ___ y
3 3 1___ n
3 4 1___ n 1__ ___ ___ ___ n
3 5 1___ n 6__ ___ ___ ___ y
3 6 1 ___:NoLimit y
3 7 1___ y _10:Calls n
3 8 pstn y
3 9 pstn y
3 10
3 11

Specify CODEC sets for your shared network regions by placing a CODEC set number in the
codec-set column. Specify the type of inter-region connections and bandwidth limits in the
remaining columns.
In the example, network region 3 is directly connected to regions 6, and 7, and is indirectly
connected to regions 2 and 4 (through region 1) and 5 (through region 6).
Press Enter to save the changes.

238 Administration for Network Connectivity for Avaya Communication Manager

 About Quality of Service (QoS) and voice quality administration

Port network to network region mapping for boards other than IP boards
Existing IP Media Processor or Resource Modules, for example, the MedPro, C-LAN, and VAL,
have assigned IP network regions. The new mapping from cabinet to IP Network Region does
not override this administration.
The critical non-IP boards of interest are the trunk circuit packs over which IGAR calls are
routed. When an IP connection between two port network/media gateways (PN/MGs) cannot be
established, the system tries to establish an IGAR trunk connection between the two PN/MGs.
The system tries to use trunks in the specific PN/MG requested. However, because
Communication Manager does not require every PN/MG to have PSTN trunks, it may be
necessary to obtain trunks from another PN/MG. The system may only obtain trunks from a PN/
MG in the same Network Region as the one in which the original request was made. This
means Communication Manager must let customers associate a port network with a Network
Region. This can already be done with Media Gateways.
Note:
Note: Cabinets connected through a center stage switch (CSS) are required to be in
network region 1.

Figure 37: IP network region field on cabinet screen to map PNs to network regions
display cabinet 1 SPE B

CABINET
CABINET DESCRIPTION
Cabinet: 1
Cabinet Layout: five-carrier
Cabinet Type: processor
Number of Portnetworks: 1
Survivable Remote EPN? n
Location: 1 IP Network Region: 1
Cabinet Holdover: A-carrier-only
Room: 1K26______ Floor: _______ Building: 22_____

CARRIER DESCRIPTION
Carrier Carrier Type Number Duplicate

C port_____________ PN 01
B processor________ PN 01
A processor________ PN 01
X fan______________
D dup-sw-node______ SN 01 01E
E switch-node______ SN 01 01D

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Status of inter-region usage

You can check the status of bandwidth usage between network regions using:
status ip-network-region n or n/m. Using the n, the connection status, bandwidth limits,
and bandwidth usage is displayed for all regions directly connected to n. For regions indirectly
connected to n, just the connection status is displayed. If regions n and m are indirectly
connected, using n/m in the command displays the connection status, bandwidth limits, and
bandwidth usage, for each intermediate connection.
The IGAR Now/Today column on the Inter Network Region Bandwidth Status screen displays
the number of times IGAR has been invoked for a network region pair, as shown in Figure 38.
Type status ip-network-region n, and press Enter to display the Inter Network Region
Bandwidth Status screen.

Figure 38: IP network region status screen

status ip-network-region 2
Inter Network Region Bandwidth Status
Number of # Times
Src Dst Conn Conn BW-Limit BW-Used(Kbits) Connections BW-Limit IGAR
Rgn Rgn Type Stat Tx Rx Tx Rx Hit Today Now/Today
2 1 direct pass 128 Kbits xxx xxx xxx xxx xxx xxx/ xxx
Video: NoLimit xxx xxx xxx xxx xxx xxx/ xxx
Priority: NoLimit xxx xxx xxx xxx xxx xxx/ xxx
2 3 indirect pass NoLimit xxx xxx xxx xxx xxx xxx/ xxx
Video: NoLimit xxx xxx xxx xxx xxx xxx/ xxx
Priority: NoLimit xxx xxx xxx xxx xxx xxx/ xxx
2 4 indirect pass NoLimit xxx xxx xxx xxx xxx xxx/ xxx
Video: NoLimit xxx xxx xxx xxx xxx xxx/ xxx
Priority: NoLimit xxx xxx xxx xxx xxx xxx/ xxx
2 11 indirect pass NoLimit xxx xxx xxx xxx xxx xxx/ xxx
Video: NoLimit xxx xxx xxx xxx xxx xxx/ xxx
Priority: NoLimit xxx xxx xxx xxx xxx xxx/ xxx

The numbers in the column titled “IGAR Now/Today” have the following meanings:
● The first number (up to 3 digits or 999) displays the number of active IGAR connections for
the pair of network regions at the time the command was invoked.
● The second number (up to 3 digits or 999) displays the number of times IGAR has been
invoked for the pair of network regions since the previous midnight.

To administer the network region on the Signaling Group screen

Note:
Note: The S8300 Media Server in LSP mode does not support signaling groups.
1. Type change signaling-group group# and press Enter to display the Signaling
Group screen.

240 Administration for Network Connectivity for Avaya Communication Manager

 About Quality of Service (QoS) and voice quality administration

2. Type the number of the network region that corresponds to this signaling group in the
Far-end Network Region field. The range of values is: 1-250 (S8300, S8500 or
S8700-series servers)
3. Press Enter to save the changes.

Reviewing the network region administration

To check the network region administration:
1. Type list ip-network-region qos and press Enter to display the IP Network
Regions QOS screen.

list ip-network-region qos Page 1 of x

IP NETWORK REGIONS QOS

---- PHB Values ---- 802.1p Priority RSVP Refr

Region Name Audio Video Ctrl BBE Audio Video Ctrl Profile Rate
1 Denver 46 26 34 46 0 5 7 guaranteed 15
2 Cheyenne 19 19 19 46 0 2 1 controlled-load 15

2. Ensure that you have the proper values for each network region and that the regions are
interconnected according to your design.
3. Type list ip-network-region monitor and press Enter to see the IP Network
Regions Monitor screen, which includes information about the CODEC sets.

list ip-network-region monitor Page 1 of x

IP NETWORK REGIONS MONITOR

RTCP Monitor Port Report Codec UDP Port Range

Region Name IP Address Number Period Set Min Max
1 Denver 123.123.123.123 5005 5 1 2048 3049
2 Cheyenne 123.123.123.123 5005 5 1 2048 65535

4. Ensure that the audio transport parameters are administered according to your design.

Setting network performance thresholds

Note:
Note: The craft (or higher) login is required to perform this administration.
Communication Manager gives you control over four IP media packet performance thresholds
to help streamline VoIP traffic. You can use the default values for these parameters, or you can
change them to fit the needs of your network. These threshold values apply only to IP trunks
and do not affect other IP endpoints.

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Note:
Note: You cannot administer these parameters unless these conditions are met:
● The Group Type field on the Signaling Group screen is h.323 or sip.
● The Bypass If IP Threshold Exceeded field is set to y on the Signaling Group screen.
If bypass is activated for a signaling group, ongoing measurements of network activity
collected by the system are compared with the values in the IP-options
system-parameters screen. If the values of these parameters are exceeded by the
current measurements, the bypass function terminates further use of the network path
associated with the signaling group. The following actions are taken when thresholds are
exceeded:
- Existing calls on the IP trunk associated with the signaling group are not maintained.
- Incoming calls are not allowed to arrive at the IP trunks on the bypassed signaling
group and are diverted to alternate routes.
- Outgoing calls are blocked on this signaling group.
If so administered, blocked calls are diverted to alternate routes (either IP or circuits)
as determined by the administered routing patterns.
Note:
Note: Avaya strongly recommends that you use the default values.

242 Administration for Network Connectivity for Avaya Communication Manager

 About Quality of Service (QoS) and voice quality administration

To administer network performance parameters

1. Enter change system-parameters ip-options to open the IP Options System
Parameters screen.

change system-parameters ip-options

IP-OPTIONS SYSTEM PARAMETERS

IP MEDIA PACKET PERFORMANCE THRESHOLDS

Roundtrip Propagation Delay (ms) High: 30 Low: 20
Packet Loss (%) High: 10 Low: 5
Ping Test Interval (sec): 10
Number of Pings Per Measurement Interval: 10

RTCP MONITOR SERVER

Default Server IP Address: 192.168.15 .210
Default Server Port: 5005
Default RTCP Report Period(secs): 5

AUTOMATIC TRACEROUTE ON
Link Failure? n

H.248 MEDIA GATEWAY H.323 IP ENDPOINT

Link Loss Delay Timer (Min): 5 Link Loss Delay Timer (min): 60
Primary Search Time (sec): 75

2. Enter values for the fields suitable for your network needs (defaults shown in the table
below).

Field Conditions/
Roundtrip Propagation Delay (ms) High: 800 Low: 400
Packet Loss (%) High: 40 Low: 15
Ping Test Interval (sec) 20
Number of Pings per Measurement 10
Interval

3. Press Enter to save the changes.

Enabling spanning tree protocol (STP)

Spanning Tree Protocol (STP) is a loop avoidance protocol. If you don't have loops in your
network, you don't need STP. The "safe" option is to always leave STP enabled. Failure to do so
on a network with a loop (or a network where someone inadvertently plugs the wrong cable into
the wrong ports) can lead to a complete cessation of all traffic.

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However, STP is slow to converge after a network failure, and slow to allow a new port into the
network (~50 sec by default).
A modified version of STP, Rapid Spanning Tree converges faster than the earlier STP, and
enables new ports much faster (sub-second) than the older protocol. Rapid Spanning Tree
works with all Avaya equipment, and is recommended by Avaya.

To enable/disable spanning tree

1. Open a telnet session on the P330 stack processor, using the serial cable connected to the
Console port of the G700.
2. At the P330-x(super)# prompt, type set spantree help and press Enter to display the
set spantree commands selection.
The full set of Spanning Tree commands is displayed in Figure 39.

Figure 39: Set Spantree commands

3. To enable Spanning Tree, type set spantree enable and press Enter.
4. To set the version of Spanning Tree, type set spantree version help and press
Enter.
The selection of Spanning Tree protocol commands displays (see Figure 39).
5. To set the rapid spanning tree version, type set spantree version
rapid-spanning-tree and press Enter.
The 802.1w standard defines differently the default path cost for a port compared to STP
(802.1d). In order to avoid network topology change when migrating to RSTP, the STP path
cost is preserved when changing the spanning tree version to RSTP. You can use the
default RSTP port cost by typing the CLI command set port spantree cost auto.

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 About Quality of Service (QoS) and voice quality administration

Note:
Note: Avaya P330s now support a "Faststart" or "Portfast" function, because the
802.1w standard defined it. An edge port is a port that goes to a device that
cannot form a network loop.
To set an edge-port, type set port edge admin state module/port
edgeport.
For more information on the Spanning Tree CLI commands, see the Avaya P330 User’s Guide
at http://www.avaya.com/support.

Adjusting jitter buffers

Since network packet delay is usually a factor, jitter buffers should be no more than twice the
size of the largest statistical variance between packets. The best solution is to have dynamic
jitter buffers that change size in response to network conditions. Avaya equipment uses
dynamic jitter buffers.
● Check for network congestion
● Bandwidth too small
● Route changes (can interact with network congestion or lack of bandwidth)

Configuring UDP ports

Communication Manager allows users to configure User Datagram Protocol (UDP) port ranges
that are used by VoIP packets. Network data equipment uses these port ranges to assign
priority throughout the network. Communication Manager can download default values to the
endpoint when those values are not provided by the endpoint installer or the user.

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About Media Encryption

This section provides information on the use and administration of Avaya Communication
Manager Media Encryption. Use any of the following links to go to the appropriate section:
● What is Media Encryption?
● What are the limitations of Media Encryption?
● What types of media encryption are available?
● Is there a license file requirement?
● Administering Media Encryption
● How does Media Encryption interact with other features?
● About legal wiretapping
● About possible failure conditions

What is Media Encryption?

To provide privacy for media streams that are carried over IP networks, Avaya Communication
Manager supports encryption for IP bearer channel — voice data transported in Real Time
Protocol (RTP) — between any combination of media gateways and IP endpoints.
Digitally encrypting the audio (voice) portion of a VoIP call can reduce the risk of electronic
eavesdropping. IP packet monitors, sometimes called sniffers, are to VoIP calls what wiretaps
are to circuit-switched (TDM) calls, except that an IP packet monitor can watch for and capture
unencrypted IP packets and can play back the conversation in real-time or store it for later
playback.
With media encryption enabled, Communication Manager encrypts IP packets before they
traverse the IP network. An encrypted conversation sounds like white noise or static when
played through an IP monitor. End users do not know that a call is encrypted because there are:
● No visual or audible indicators to indicate that the call is encrypted.
● No appreciable voice quality differences between encrypted calls and non-encrypted calls.

246 Administration for Network Connectivity for Avaya Communication Manager

 About Media Encryption

What are the limitations of Media Encryption?

! SECURITY ALERT:
SECURITY ALERT: Be sure that you understand these important media encryption limitations:

1. Any call that involves a circuit-switched (TDM) endpoint such as a DCP or

analog phone is vulnerable to conventional wire-tapping techniques.

2. Any call that involves an IP endpoint or gateway that does not support
encryption can be a potential target for IP monitoring. Common examples are IP
trunks to 3rd-party vendor switches.

3. Any party that is not encrypting an IP conference call exposes all parties on the
IP call between the unencrypted party and its supporting media processor to
monitoring, even though the other IP links are encrypting.

What types of media encryption are available?

Avaya Encryption Algorithm (AEA) and Advanced Encryption Standard (AES) are supported by
most Avaya IP endpoints. Starting with Communication Manger release 4.0, the Secure Real
Time Protocol (SRTP) encryption standard is supported by SIP endpoints and trunks and by the
9600-series telephones.
Table 18: Media Encryption support lists the telephones and Communication Manager releases
that support each type of media encryption.

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Table 18: Media Encryption support

Media Encryption Type

AEA AES SRTP

Communication Manager release CM 1.3 CM 2.0 CM 4.0
and later and later and later
Avaya IP telephones:
4601 Y Y N
4602 Y Y N
4606 Y N N
4610SW Y Y N
4612 Y N N
4620 Y Y N
4620SW / 4621SW / 4622SW / 4625SW / 4630SW Y Y N
4624 Y N N
4630 Y N N
4690 N N N
9600-series IP telephones Y Y Y
SIP endpoints N N Y
IP Softphone Y Y N
IP SoftConsole Y Y N
IP Agent Y Y N
TN2302AP IP Media Processor circuit pack Y Y N
TN2602AP IP Media Resource 320 circuit pack Y Y Y
VoIP elements of H.248 media gateways Y Y Y

248 Administration for Network Connectivity for Avaya Communication Manager

 About Media Encryption

Is there a license file requirement?

Media Encryption does not work unless the server has a valid license file with Media Encryption
enabled. First check the current license file (Is Media Encryption currently enabled?) and if
Media Encryption is not enabled, then you must install a license file with Media Encryption
enabled.

Is Media Encryption currently enabled?

To determine whether Media Encryption is enabled in the current License File:
1. At the SAT type display system-parameters customer-options and press Enter
to display the Optional Features screen.
2. Scroll to the page with the Media Encryption Over IP? field and verify that the value is y.
Media encryption field on Optional Features screen
display system-parameters customer-options Page 4 of 11
OPTIONAL FEATURES

Emergency Access to Attendant? y IP Stations? y

Enable 'dadmin' Login? y Internet Protocol (IP) PNC? n
Enhanced Conferencing? n ISDN Feature Plus? y
Enhanced EC500? y ISDN Network Call Redirection? y
Enterprise Wide Licensing? n ISDN-BRI Trunks? y
Extended Cvg/Fwd Admin? y ISDN-PRI? y
External Device Alarm Admin? y Local Spare Processor? n
Five Port Networks Max Per MCC? y Malicious Call Trace? y
Flexible Billing? y Media Encryption Over IP? y
Forced Entry of Account Codes? y Mode Code for Centralized Voice Mail? y
Global Call Classification? y
Hospitality (Basic)? y Multifrequency Signaling? y
Hospitality (G3V3 Enhancements)? y Multimedia Appl. Server Interface (MASI)? n
IP Trunks? y Multimedia Call Handling (Basic)? n
Multimedia Call Handling (Enhanced)? n
IP Attendant Consoles?

(Note: You must logoff & login to effect the permission changes)

Media Encryption is enabled by default in the U. S. and other countries unless prohibited by
export regulations.

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Administering Media Encryption

This section contains Avaya Communication Manager administration procedures for:
● Administering Media Encryption for IP Codec Sets
● Administering Media Encryption for signaling groups
Note:
Note: IP endpoints do not require any encryption administration, and end users do not
have to do anything to use media encryption.

Administering Media Encryption for IP Codec Sets

The IP Codec Set screen enables you to administer the type of media encryption, if any, for
each codec set.
Note:
Note: See Table 15: IP Codec Set screen fields, page 1 on page 215 for a description
of the fields on the IP Codec Set screen.

To administer media encryption on an IP codec set:

1. At the SAT type change ip-codec-set number and press Enter to display the IP Codec
Set screen.
Media Encryption field on the IP Codec Set screen
change ip-codec-set 7 Page 1 of 2

IP Codec Set

Codec Set: 7

Audio Silence Frames Packet

Codec Suppression Per Pkt Size(ms)
1: G.711MU n 2 20
2: G.729B_ n 1 10
3: _______ _ _
4: _______ _ _
5: _______ _ _
6: _______ _ _
7: _______ _ _

Media Encryption:
1: 1-srtp-aescm128-hmac80
2: aes
3: aea

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 About Media Encryption

2. Enter up to three media encryption types listed in Table 19: Media Encryption Field Values
(IP Codec Set) on page 251:
Note:
Note: The option that you select for the Media Encryption field for each codec set
applies to all codecs defined in that set.
Note:
Note: This field is hidden if the Media Encryption Over IP? field on the Customer
Options screen (Media encryption field on Optional Features screen on
page 249) is n. The Media Encryption field appears only if the Media
Encryption over IP feature is enabled in the license file (and displays as y on
the Customer Options screen).
The Media Encryption field specifies one, two, or three options for the negotiation of
encryption — in this example, one of the modes of SRTP, aes, and aea. You can specify no
encryption by entering none in the Media Encryption field. The order in which the options are
listed signifies the preference of use, similar to the list of codecs in a codec set. Two endpoints
must support at least one common encryption option for a call to be completed between them.
The selected options for an IP codec set applies to all codecs defined in that set.
.
Table 19: Media Encryption Field Values (IP Codec Set)

Valid entries Usage

aes Advanced Encryption Standard (AES), a standard cryptographic

algorithm for use by U.S. government organizations to protect sensitive
(unclassified) information. AES reduces circuit-switched-to-IP call
capacity by 25%.
aea Avaya Encryption Algorithm. AEA is not as secure an algorithm as AES
but call capacity reduction with AEA is negligible.
Use this option as an alternative to AES encryption when:
● All endpoints within a network region using this codec set must be
encrypted.
● All endpoints communicating between two network regions and
administered to use this codec set must be encrypted.
SRTP — SRTP provides encryption and authentication of RTP streams for calls
several between SIP-SIP endpoints, H.323-H.323 endpoints, and SIP-H.323
encryption endpoints. SIP endpoints cannot use AEA or AES encryption.
modes See Table 15: IP Codec Set screen fields, page 1 on page 215 for a list
of SRTP encryption modes.
none Media stream is unencrypted. This option prevents encryption when
using this codec set and is the default setting when Media Encryption is
not enabled.

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Note:
Note: The initial default value for this field is none when the Media Encryption Over
IP? field in the Optional Features screen (on the Customer Options screen) is
enabled (y) for the first time. If this field is n, the Media Encryption field on the IP
Codec Set screen is hidden and functions as if none was selected.

Administering Media Encryption for signaling groups

To administer Media Encryption for an IP signaling group:

1. At the SAT type change signaling-group number to display the Signaling Group
screen
Media encryption and passphrase fields for signaling groups
change signaling-group 1 Page 1 of 5
SIGNALING GROUP

Group Number: 1 Group Type: h.323

Remote Office? n Max number of NCA TSC: 0
SBS? n Max number of CA TSC: 0
Trunk Group for NCA TSC:
Trunk Group for Channel Selection:
Supplementary Service Protocol: a
T303 Timer (sec): 10

Near-end Node Name: Far-end Node Name:

Near-end Listen Port: 1720 Far-end Listen Port:
Far-end Network Region:
LRQ Required? n Calls Share IP Signaling Connection? n
RRQ Required? n
Media Encryption? y Bypass If IP Threshold Exceeded? n
Passphrase: H.235 Annex H Required? n
DTMF over IP: out of band Direct IP-IP Audio Connections? y
Link Loss Delay Timer(sec): 90 IP Audio Hairpinning? n
Interworking Message: PROGress
DCP/Analog Bearer Capability: 3.1kHz

2. Enter y in the Media Encryption? field to enable Media Encryption on trunk calls using this
signaling group.

252 Administration for Network Connectivity for Avaya Communication Manager

 About Media Encryption

Note:
Note: Leaving this field in the default state (n) overrides the encryption administration
on the IP Codec Set screen (Media Encryption field on the IP Codec Set
screen on page 250) for any trunk call using this signaling group. That is, if the IP
codec set that is used between two networks is administered as aes or aea
(Table 19: Media Encryption Field Values (IP Codec Set) on page 251), then a
call between two endpoints over a H.323 trunk using this IP codec set fails
because there is no voice path.

This field does not display if the Media Encryption Over IP? field is n on the
Customer Options screen (Media encryption field on Optional Features
screen on page 249).
3. Type an 8- to 30-character string in the Passphrase field.
This string:
● Must contain at least 1 alphabetic and 1 numeric symbol
● Can include letters, numerals, and!&*?;'^(),.:-
● Is case-sensitive
You must administer the same passphrase on both signaling group forms at each end of the
IP trunk connection. For example, if you have two systems A and B with trunk A-B between
them, you must administer both Signaling Group forms with exactly the same passphrase
for the A-to-B trunk connection.
If you have previously administered a passphrase, a single asterisk (*) appears in this field.
If you have not administered a passphrase, the field is blank.
Note:
Note: The Passphrase field does not appear if either the:
● Media Encryption Over IP? field on the Customer Options screen (Media
encryption field on Optional Features screen on page 249) is n.
or
● Media Encryption? field on the Signaling Group screen (Media encryption and
passphrase fields for signaling groups on page 252) is n.

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Viewing encryption status for stations and trunks

The current status of encryption usage by stations and trunks can be viewed using the status
station and status trunk commands.
To check media encryption usage for a station, enter status station <extension>, and
go to the Connected Ports page.
Connected ports screen
status station 60042 Page 6 of 7

SRC PORT TO DEST PORT TALKPATH

src port: s00001
S00001:TX:172.22.21.178:2976/g711u/20ms/1-srtp-aescm128-hmac80
S00001:TX:172.22.21.178:36226/g711u/20ms/1-srtp-aescm128-hmac80

This screen shows that a port is currently connected and using a G711 codec with SRTP
media encryption.
To check media encryption usage for a trunk, enter status trunk <group/member>.
A display screen similar to the status station screen shows the trunk information.

About legal wiretapping

If you receive a court order requiring you to provide law enforcement access to certain calls
placed to or from an IP endpoint, you can administer Service Observing permissions to a
selected target endpoint (see Service Observing in Table 20: Media Encryption interactions on
page 255). Place the observer and the target endpoint in a unique Class of Restriction (COR)
with exactly the same properties and calling permissions as the original COR, otherwise the
target user might be aware of the change.

About possible failure conditions

Using Media Encryption in combination with an administered security policy might lead to
blocked calls or call reconfigurations because of restricted media capabilities. For example, if
the IP codec set that is used between two network regions is administered as aes or aea, and if
a call between two endpoints (one in each region) that do not support at least one common
encryption option is set up, then there is no voice path.

254 Administration for Network Connectivity for Avaya Communication Manager

 About Media Encryption

How does Media Encryption interact with other features?

Media Encryption does not affect most Communication Manager features or adjuncts, except
for those listed in Table 20: Media Encryption interactions on page 255.

Table 20: Media Encryption interactions

Interaction Description

Service You can Service Observe a conversation between encrypted

Observing endpoints. The conversation remains encrypted to all outside
parties except the communicants and the observer.
Voice Any call from an encryption-enabled endpoint is decrypted
Messaging before it is sent to a voice messaging system. When the
TN2302AP IP Media Processor circuit pack receives the
encrypted voice stream, it decrypts the packets before
sending them to the voice messaging system, which then
stores the packets in unencrypted mode.
Hairpinning Hairpinning is not supported when one or both media streams
are encrypted, and Avaya Communication Manager does not
request hairpinning on these encrypted connections.
VPN Media encryption complements virtual private network (VPN)
security mechanisms. Encrypted voice packets can pass
through VPN tunnels, essentially double-encrypting the
conversation for the VPN “leg” of the call path.
H.323 trunks Media Encryption behavior on a call varies based on these
conditions at call set up:
● Whether shuffled audio connections are permitted
● Whether the call is an inter-region call
● Whether IP trunk calling is encrypted or not
● Whether the IP endpoint supports encryption
● The media encryption setting for the affected IP codec
sets
These conditions also affect the codec set that is available for
negotiation each time a call is set up.

T.38 packets may be carried on an H.323 trunk that is

encrypted; however the T.38 packet is sent in the clear.

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About network management

Network management is the practice of using specialized software tools to monitor and maintain
network components. Proper network management is a key component to the high availability
of data networks.
The two basic network management models are:
● Distributed. Specialized, nonintegrated tools (and sometimes organizations) to manage
discrete components
● Centralized. Integrating network management tools and organizations for a more coherent
management strategy.
For a detailed discussion of Avaya’s network management products, common third-party tools,
and the distributed and centralized management models, see Avaya Application Solutions: IP
Telephony Deployment Guide (555-245-600).
This section touches on the following topics:
● About H.248 link loss recovery
● Enterprise Survivable Servers (ESS)
● Controlling QoS policies
● Monitoring network performance

About H.248 link loss recovery

H.248 Link Loss Recovery is an automated way in which the media gateway reacquires the
H.248 link when it is lost from either a primary call controller or an LSP. The H.248 link between
a media server running Communication Manager and a media gateway, and the H.323 link
between a media gateway and an H.323-compliant IP endpoint, provide the signaling protocol
for:
● Call setup
● Call control (user actions such as Hold, Conference, or Transfer) while the call is in
progress
● Call tear-down
If the link goes down, Link Recovery preserves any existing calls and attempts to re-establish
the original link. If the gateway/endpoint cannot reconnect to the original server/gateway, then
Link Recovery automatically attempts to connect with alternate TN799DP (C-LAN) circuit packs
within the original server’s configuration or to a Local Survivable Processor (LSP).
Overlap with the Auto Fallback to Primary feature occurs when the Link Loss Recovery starts
while the media gateway is trying to migrate back to the primary, with its new registration
message indicating that service is being obtained from elsewhere.

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 About network management

A race condition may exist in which there is an outstanding media gateway registration to the
primary while the link to the LSP is lost. The media gateway awaits a denial or acceptance from
the primary call controller. If it is an acceptance, then the Link Loss Recovery is terminated, and
the media gateway is serviced by the primary call controller. If it is a denial, then the media
gateway immediately sends a new registration to the primary call controller indicating no
service, and the existing H.248 Link Loss Recovery feature takes over.
These features are similar in that they both attempt to return service to the primary call
controller; however, Link Loss Recovery does it based upon a link failure, whereas auto fallback
to primary does it based upon a working fragmented network.

Auto fallback to primary controller for

H.248 media gateways
The intent of the auto fallback to primary controller feature is to return a fragmented network, in
which a number of H.248 Media Gateways are being serviced by one or more LSPs (Local
Survivable Processors), to the primary media server in an automatic fashion. This feature is
targeted towards all H.248 media gateways. By migrating the media gateways back to the
primary automatically, the distributed telephony switch network can be made whole sooner
without human intervention, which is required today.
The auto-fallback migration, in combination with the connection preservation feature for H.248
gateways is connection-preserving. Stable connections are preserved; unstable connections
(such as ringing calls) are not. There still may be a very short interval without dialtone for new
calls.
The media gateway presents a new registration parameter that indicates that Service is being
obtained from an LSP, and indicates the number of active user calls on the media gateway
platform. The server administers each media gateway to have its own set of rules for Time of
Day migration, enable/disable, and the setting of call threshold rules for migration.
This feature allows the administrator to define any of the following rules for migration:
● The media gateway should migrate to the primary automatically, or not.
● The media gateway should migrate immediately when possible, regardless of active call
count.
● The media gateway should only migrate if the active call count is 0.
● The media gateway should only be allowed to migrate within a window of opportunity, by
providing day of the week and time intervals per day. This option does not take call count
into consideration.
● The media gateway should be migrated within a window of opportunity by providing day of
the week and time of day, or immediately if the call count reaches 0. Both rules are active
at the same time.
Internally, the primary call controller gives priority to registration requests from those media
gateways that are currently not being serviced by an LSP. This priority is not administrable.

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There are several reasons for denying an auto-fallback, which can result from general system
performance requirements, or from administrator-imposed requirements. General system
performance requirements can include denial of registration because:
● Too many simultaneous media gateway registration requests
Administrator-imposed requirements for denial of a registration can include:
● Registrations restricted to a windowed time of day
● Migration restricted to a condition of 0 active calls, that is, there are no users on calls
within the media gateway in question.
● The administered minimum time for network stability has not been exceeded.
Other characteristics of this feature include:
● This feature does not preclude an older GW firmware release from working with
Communication Manager 3.0 or vice versa; however, the auto-fallback feature would not
be available.
For this feature to work, the call controller is required to have Communication Manager 3.0,
while the media gateway is required to have the GW firmware available at the time of the
Communication Manager 3.0 release.
● Existing H.248 media gateways are the targets.
● LSP operation is completely unaffected.
The LSP simply sees that a particular media gateway has lost its connection with the LSP.
The existing H.248 Link Loss Recovery algorithm on the LSP cleans up all outstanding call
records within the LSP after the prescribed time interval.

Basic feature operation

The following steps illustrate the basic operation of the auto-fallback to primary for H.248 media
gateways feature. While not exactly so, the steps are approximately sequential.
1. The media gateway/media server by default has this feature disabled.
If the media gateway is initially registered with an older media server, the version
information exchange is sufficient for the media gateway to know not to attempt to fallback
to the primary automatically.
2. By means of administration on the media server, this feature can be enabled for any or all
media gateways controlled by that media server.
The enable/disable administration on the media server determines whether the media
server will accept/deny registration requests containing the new parameter that service is
being obtained from an LSP. The media gateway continuously attempts to register with the
media server, however, even if the media server has been administered never to accept the
registration request (that is, the auto-fallback feature is disabled on the media server). In
such a case, a manual return of the media gateway is required, which generates a different
registration message that is accepted by the media server.

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 About network management

Note:
Note: There is still value in receiving the registration messages when auto-fallback is
disabled on the media server, and that value is to see the stability of the network
over time, since those messages act as "keep-alive" messages.
3. The permission-based rules that include time of day and context information are only known
to the media server.
There is no need for the LSP to have any of these translations.
4. When associated with a primary controller running Communication Manager 3.0, the media
gateway attempts to register with the primary controller whenever it is connected to an LSP.
This registration attempt happens every 30 seconds, once the media gateway is able to
communicate with the primary controller. The registration message contains an element
that indicates:
● that the media gateway is being serviced by an LSP, and
● the number of active user calls on that media gateway.
5. Upon the initial registration request, the primary controller initializes the encrypted TCP link
for H.248 messaging.
This is performed regardless of whether that initial registration is honored or not, and that
encryption is maintained throughout the life of the registration requests. The encryption is
also maintained once a registration is accepted by the primary controller. Encryption of the
signaling link is performed at the outset during this automatic fallback process to ensure the
security of the communication between the primary call controller and the media gateway.
6. The primary controller, based upon its administered rules, may allow or deny a registration.
If the primary controller gets a registration message without Service State information, for
example, an older media gateway, or if a new media gateway states it does not have
service, then the primary honors those registration requests above all others immediately.
7. If the registration is denied, the media gateway continues to send the registration message
every 30 seconds, which acts as a de facto ‘"keep-alive" message.
8. The media gateway constantly monitors the call count on its platform, and asynchronously
sends a registration message whenever 0 context is achieved.
9. Once the registration message is accepted by the primary, then the H.248 link to the LSP is
dropped.

G250 interworking
When calls are made on the media gateway while it is controlled by Standard Local Survivability
(SLS), the G250 behaves as any LSP might behave. The SLS, using its administration and dial
analysis plan, can allow local calls to be established from:
● Local station to local station (analog or registered IP)
● Local station to local analog two-way CO trunks

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While operating in SLS mode, the G250 attempts to re-register with the primary controller on its
MGC list. As soon as the gateway is able to re-register with the primary controller, it un-registers
with SLS, and re-registers with the primary controller. In terms of re-registration with the primary
controller, the Auto Fallback to Primary feature would therefore work in a similar way with the
G250 SLS as it does with the LSPs in the G350 or G700.
Note:
Note: The connection preserving aspects of this feature will not be available on the
G250 for this release.

G350 interworking
The G350 firmware loads use the Object Identifier (OID) that has the longer Non-Standard Data
format in the registration message. This format is only backward compatible to Communication
Manager 2.0 loads. Older loads respond with a protocol error as the denial cause for the
rejection of the new registration message. Given that the G350 was only introduced in the
Communication Manager 2.0 timeframe, it is not backwards compatible with previous
Communication Manager releases.
In a startup scenario, there is an exchange of version information between Communication
Manager and the media gateway. If the Communication Manager load is pre-Communication
Manager 3.0, then the auto-fallback mechanism remains disabled for the media gateway. Any
subsequent registration with a primary controller (from the MGC list) that is running release
Communication Manager 3.0 results in the auto fall-back feature being enabled for the media
gateway.
The only time when the media gateway may send a registration message to an older primary
call controller is in the rare case when the primary controller has been downgraded while the
media gateway has been receiving service from an LSP. In this case, the media gateway
receives a protocol error that can be used to send a registration message consistent with
Communication Manager 2.0. Downgrading to earlier than Communication Manager 2.0 with a
G350 would result in the G350 not being able to register at all.

G700 interworking
The G700 Media Gateway, even in Communication Manager 2.0, still used the same OID as
when it was originally deployed. The OID available for the G350 was not ported to the G700.
The auto fallback to primary feature requires that all G700s, running the Communication
Manager 3.0-compliant firmware load, use the OID format. The NSD (Non-Standard Data)
expansion with the OID is used to carry the context count.
If the media gateway receives any of the following errors in response to a registration message,
then the media gateway sends the original OID registration message prior to the expansion of
the NSD.
● 284 - NSD OID invalid
● 283 - NSD OID wrong length
● 345 - NSD Wrong Length - for Communication Manager 1.3 and earlier systems

260 Administration for Network Connectivity for Avaya Communication Manager

 About network management

Though not directly necessary for this feature, the media gateway responds to any of the
aforementioned protocol errors by attempting to register with the lowest common denominator
registration message. This allows new media gateways to be backward compatible with even
older releases. This modification only applies to the G700.

Older media gateway loads

The auto-fallback feature on the media server is passive in nature; therefore, an older media
gateway load trying to register with the new Communication Manager 3.0 load registers with
priority, since the value of the Service-State is that of a media gateway without service. Any
defined rules for the media gateway are ignored, given that an older media gateway firmware
release tries to register only when it no longer has service from another media server; therefore,
the administration of rules for old media gateway firmware loads are irrelevant.

Administering auto fallback to primary

For each media gateway, the following administration must be performed:
● Adding Recovery Rule to Media Gateway screen
● Administering the System Parameters Media Gateway Automatic Recovery Rule screens
to schedule the auto-fallback within the system-parameters area.

Adding Recovery Rule to Media Gateway screen

The Media Gateway screen (change media-gateway n) has a field called Recovery Rule
with the following attributes:
● Acceptable values for the field are none, 1 - 50, or 1 - 250, where
- 50 is the maximum number of supported media gateways on an S8300 Media Server,
and
- 250 is the maximum number of supported media gateways on an S8500 or S8700-series
Media Server.
● Default is none, which indicates that no automatic fallback registrations will be accepted.
● The value of 1 - 50, or 1 - 250 applies a specific recovery rule to that numbered gateway.
Note:
Note: A single recovery rule number may be applied to all media gateways, or each
media gateway may have its own recovery rule number, or any combination in
between.
By associating the recovery rule to the Media Gateway screen (see Figure 40), an
administrator can use the list media-gateway command to see which media gateways
have the same recovery rules. All the administration parameters for the media gateways are
consolidated on a single screen. The actual logic of the recovery rule is separate, but an
administrator can start from the Media Gateway screen and proceed to find the recovery rule.

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Note:
Note: These changes apply to the display media-gateway command, as well.

Figure 40: Media Gateway screen

change media-gateway 1 Page 1 of 1
MEDIA GATEWAY

Number: 1 IP Address: xxx.xxx.xxx.xxx

Type: g350 Fw Version/HW Vintage: xxx.yyy.zzz/nnn
MAC Address: 00:04:0d:00:00:64
Serial Number: Encrypt Link? y
Network Region: 1 Location: 1
Registered? y Controller IP Address: xxx.xxx.xxx.xxx
Recovery Rule: none Site Data:
Slot Module Type Name
V1: S8300 ICC MM
V2: MM714 4+4 ANA MM
V3: MM722 2 TRUNK BRI MM
V4: MM710 DS1 MM

V8:
V9:

In the above example, no automatic fallback registration requests will be accepted by the
primary controller for Media Gateway 1 when it is active on an LSP.
Note:
Note: For more detailed descriptions of the entries and values fields on this screen, see
Maintenance Commands for Avaya Communication Manager, Media Gateways
and Servers, 03-300431, at http://www.avaya.com/support).

Administering the System Parameters Media Gateway Automatic Recovery Rule

screens
Definition of recovery rules occurs on the System Parameters Media Gateway Automatic
Recovery Rule screens (change system-parameters mg-recovery-rule <n>. This
screen is contained within the ’system-parameters’ area of administration screens. The
maximum number of screens that can be administered correspond to the maximum number of
media gateways supported by the media server in question, and are:
● Up to 50 for the S8300 Media Server
● Up to 250 for the S8500 and S8700-series Media Servers

262 Administration for Network Connectivity for Avaya Communication Manager

 About network management

These screens provide a field, Migrate H248 MG to primary, with 4 administrable options:
Note:
Note: For detailed information on all four options, see Administrator Guide for Avaya
Communication Manager, 03-300509.
1. immediately — which means that the first media gateway registration that comes from the
media gateway is honored, regardless of context count or time of day.
The Warning displayed in Figure 41 is visible when a user selects this option. This option is
the default for all rules.
2. 0-active calls — which means that the first media gateway registration reporting “0 active
calls” is honored (see Figure 42).
3. Time-day-window — means that a valid registration message received during any part of
this interval is honored (see Figure 43).
Note:
Note: Time of day is local to the media gateway.
There are no constraints on the number of active calls. The time scale provided for each
day of the week goes from 00-23 hundred hours (military time). The user must specify an ‘x’
or ‘X’ for each hour where they want to permit the return migration. If they do not want to
permit a given hour, then they leave it blank. This method gets around overlapping time
issues between days of the week. Users can specify as many intervals as they wish.
4. Time-window-OR-0-active-calls — means that a valid registration is accepted anytime,
when a 0 active call count is reported OR if a valid registration with any call count is
received during the specified time/day intervals (see Figure 44).
Note:
Note: Time of day is local to the media gateway.
The time scale provided for each day of the week goes from 00-23 hundred hours (military
time). The user must specify an ‘x’ or ‘X’ for each hour where they want to permit the return
migration. If they do not want to permit a given hour then they leave it blank. This method
gets around overlapping time issues between days of the week. Users can specify as many
intervals as they wish.

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Figure 41: System-parameters mg-recovery-rule screen: immediately

change system-parameters mg-recovery-rule <n>

SYSTEM PARAMETERS MEDIA GATEWAY AUTOMATIC RECOVERY RULE

Recovery Rule Number: n

Rule Name:
Migrate H.248 MG to primary: immediately
Minimum time of network stability: 3

WARNING: The MG shall be migrated at the first possible opportunity. The MG

may be migrated with a number of active calls. These calls shall have their
talk paths preserved, but no additional call processing of features shall be
honored. The user must hang up in order to regain access to all features.

Note: set ’Migrate H.248 MG to primary’ to Blank to disable rule.

Administer the following fields:

Field Description

Recovery Rule Number The number of the recovery rule:

● Up to 50 for the S8300 Media
Server
● Up to 250 for the S8500 and
S8700-series Media Servers
Rule Name Optional text name for the rule, to aid in
associating rules with media gateways.
Migrate H.248 MG to One of 4 administrable options.
primary
Minimum time of network Administrable time interval for stability in
stability the H.248 link before auto-fallback is
allowed. Between 3-15 minutes
(Default is 3 minutes).

Figure 42 shows the screen for the 0-active calls option.

264 Administration for Network Connectivity for Avaya Communication Manager

 About network management

Figure 42: System-parameters mg-recovery-rule screen: 0-active calls

change system-parameters mg-recovery-rule <n>

SYSTEM PARAMETERS MEDIA GATEWAY AUTOMATIC RECOVERY RULE

Recovery Rule Number: n

Rule Name:
Migrate H.248 MG to primary: 0-active-calls
Minimum time of network stability: 3

WARNING: The MG shall only be migrated when there are no active calls.

Note: set ’Migrate H.248 MG to primary’ to Blank to disable rule.

Figure 43 shows the screen for the time-day-window option.

Figure 43: System-parameters mg-recovery-rule screen: time-day-window

change system-parameters mg-recovery-rule n
SYSTEM PARAMETERS MEDIA GATEWAY AUTOMATIC RECOVERY RULE
Recovery Rule Number: n
Rule Name:
Migrate H.248 MG to primary: time-day-window
Minimum time of network stability: 3
WARNING: The MG may be migrated with a number of active calls. These calls
shall have their talk paths preserved, but no additional call processing of
features shall be honored. The user must hang up in order to regain access
to all features. Valid registrations shall only be accepted during these
intervals.
Time of Day
00 12 23
Day of week
Sunday _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Monday _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Tuesday _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Wednesday _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Thursday _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Friday _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Saturday _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Note: set ’Migrate H.248 MG to primary’ to Blank to disable rule.

Figure 44 shows the screen for the time-window-OR-0-active-calls option.

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Figure 44: System-parameters mg-recovery-rule screen: time-window-OR-0-active-calls

change system-parameters mg-recovery-rule n

SYSTEM PARAMETERS MEDIA GATEWAY AUTOMATIC RECOVERY RULE

Recovery Rule Number: 1

Rule Name:
Migrate H.248 MG to primary: time-window-OR-0-active-calls
Minimum time of network stability: 3
WARNING: The MG shall be migrated at ANY time when there are no active
calls, OR the MG may be migrated with a number of active calls when a
registration is received during the specified intervals below. These calls
shall have their talk paths preserved, but no additional call processing of
features shall be honored.
Time of Day
00 12 23
Day of week
Sunday _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Monday _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Tuesday _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Wednesday _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Thursday _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Friday _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Saturday _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Note: set ’Migrate H.248 MG to primary’ to Blank to disable rule.

For administrators to see how the recovery rules are applied across all media gateways, the
Media Gateway Report screen (list media-gateway command) identifies the recovery
rule for each media gateway in the network (See Figure 45).

Figure 45: list mg-recovery screen

list media-gateway Page 1 of 1
MEDIA GATEWAY REPORT

Num Name Serial No/ IP Address/ Type NetRgn/ Reg?

FW Ver/HW Vint Cntrl IP Addr RecRule

1 GW#1 Boxster Lab 01DR11131345 135.8 .77 .62 g700 1 n

unavailable none

2 MG2 Boxster MV Lab 02DR06750093 g700 1 n

unavailable 10

3 MG3 Boxster MV Lab 01DR10245104 135.8 .77 .68 g700 1 n

unavailable none

266 Administration for Network Connectivity for Avaya Communication Manager

 About network management

In this example, media gateways #1 and #3 are administered such that no registration request
would be accepted by the primary controller when the media gateway is active on an LSP.
Media gateway #2, on the other hand, is administered with Recovery Rule #10. The SAT
command:
display system-parameters mg-recovery-rule 10
would show the details of that specific recovery rule.

Enterprise Survivable Servers (ESS)

The Enterprise Survivable Servers (ESS) feature provides survivability to port networks by
allowing backup servers to be placed in various locations in the customer’s network. The
backup servers supply service to port networks in the case where the S8500 media server, or
the S8700-series media server pair fails, or connectivity to the main Communication Manager
server(s) is lost. ESS servers can be either S8500 or S8700-series Media Servers; an S8500
can back up an S8500 or S8700, and an S8700-series server can also be used to back up a
corresponding S8700-series server. ESS servers offer full Avaya Communication Manager
functionality when in survivable mode, provided sufficient connectivity exists to other Avaya
components (for example, endpoints, gateways, and messaging servers). One exception is that
an ESS cannot control a Center Stage Switch.
When designing a network to support ESS servers, consider the following:
● ESS servers can only control port networks that they can reach over an IP-connected or
ATM-connected network.
That is, ESS servers connected on an enterprise’s public IP network will not be able to
control port networks connected to control network A or B, unless:
- ESS can control a remote port network that is connected through ATM to port networks
on control networks A or B, or
- Control networks A or B are exposed to the public IP network through control network on
the Customer’s LAN (CNOCL).
● Multiple ESSs can be deployed in a network. In the case above, an enterprise could
deploy one or more ESSs on the public network, and an additional server on control
networks A and B to backup port networks attached to the respective networks.
However, when port networks register with different ESS servers, system fragmentation
may occur. In that case, care should be taken to establish adequate routing patterns to
allow users at a particular location to be able to place calls where needed.

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● ESS servers register to the main server(s) through a C-LAN. Each ESS must be able to
communicate with a C-LAN in order to download translations from the main server. The file
synchronization process uses the following ports:
- UDP/1719 – ESS registers with the main server
- TCP/21873 – Main server sends translations to the LSP(s) (pre-Release 3.0)
- TCP/21874 – Main server sends translations to the ESS (Release 3.0 and above; also
for LSP translations)
The media gateway cannot distinguish between registration through a C-LAN or registration to
an S8300 directly. Prior to Communication Manager 3.0, without ESS, if a media gateway
successfully registered with a primary call controller IP address, then the media gateway was
properly registered with the primary call controller. However, in Communication Manager 3.0,
when a media gateway completes a successful registration through an IP address defined as a
primary call controller address, if that address is a C-LAN, the media gateway may not
necessarily be registered with the true primary call controller. The port network that houses the
C-LAN may be under control of an ESS, but the media gateway will not know that it is registered
with an ESS.
When the traditional port network migrates back to the primary call controller, then the media
gateway loses its H.248 link, and the Link Loss Recovery algorithm engages, and that should
be sufficient. The Auto Fallback to Primary feature only engages if the media gateway drops the
connection and registers with an LSP. The ESS migration should only occur if the port network
is reasonably certain to return to the primary call controller, so the media gateway would simply
return to the same C-LAN interface. Now, when the media gateway returns to the same C-LAN
interface, the Link Loss Recovery feature performs a context audit with the primary controller
and learns that the primary call controller is not aware of the media gateway. The controller in
this case issues a warm start request to the media gateway, or potentially different behavior if
connection preservation is active at the same time. The auto-fallback feature is not affected by
ESS.
For more information on ESS, see the Using the Avaya Enterprise Survivable Servers (ESS),
03-300428.

Controlling QoS policies

Avaya Policy Manager is a network management tool that allows you to control Quality of
Service (QoS) policies in your IP voice network consistently:
● Avaya Policy Manager helps you implement QoS policies consistently for both the data
and the voice networks.
● QoS policies are assigned according to network regions and are distributed through the
Enterprise Directory Gateway to your systems and to routers and switching devices.
Figure 46: Avaya Policy Manager application sequence on page 269 illustrates how Avaya
Policy Manager works.

268 Administration for Network Connectivity for Avaya Communication Manager

 About network management

Figure 46: Avaya Policy Manager application sequence

2
LDAP

Directory 1
APM Rule:
Voice traffic gets
low latency service
3 LDAP

Directory Enabled 6
Management (DEM) SNMP, Telnet, etc.
“Mark audio packets
with DiffServ value 46”

Give low latency

service to packets with
4 a DiffServ value of 46
OSSI

fcdfapm1 KLC 041504

5

Avaya
equipment ROUTERS and SWITCHES

Figure notes:

1. Business rule established in Avaya Policy 5. Communication Manager tells the

Manager Media Processor, C-LAN, and IP
2. Avaya Policy Manager uses LDAP to update Phones to mark audio packets with
Communication Manager DSCP=46.
3. Directory Enabled Management (DEM) 6. Avaya Policy Manager distributes
identifies the change in the directory. policy information to other network
4. EDG updates Communication Manager devices, including low latency
administration through the Ethernet switch service for DiffServ value of 46.

For more information about Avaya Policy Manager, see your Avaya representative.

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Monitoring network performance

The Avaya VoIP Monitoring Manager, a VoIP Network Quality monitoring tool, allows you to
monitor these quality-affecting network factors:
● Jitter levels
● Packet loss
● Delay
● CODECs used
● RSVP status
For more information about Avaya VoIP Monitoring Manager, see Avaya Application Solutions:
IP Telephony Deployment Guide (555-245-600).

270 Administration for Network Connectivity for Avaya Communication Manager

 Index

Index

duplicated TN-2602AP circuit packs . . . . . . . . . 27

duplicated TN2602AP circuit packs . . . . . . . . 144
Numerical
4600-series IP phone, configuration files . . . . . 164
4600-series IP phone, installation . . . . . . . . . 164 E
echo cancellation . . . . . . . . . . . . . . . 203, 204
plans (TN464GP/TN2464BP circuit packs) . . . 205
A plans (TN464HP/TN2464CP circuit packs) . . . 204
administration echo path delay . . . . . . . . . . . . . . . . . 203
H.323 Trunk . . . . . . . . . . . . . . . . . 137 ELS . . . . . . . . . . . . . . . . . . . . . . . . 22
H.323 Trunk, task detail . . . . . . . . . . . . 150 encryption, media. . . . . . . . . . . . . . . . . 246
H.323 Trunks . . . . . . . . . . . . . . . . . 138 Enhanced Local Survivability (ELS) . . . . . . . . . 22
IP telephones. . . . . . . . . . . . . . . . . 165 Enterprise Survivable Servers (ESS) . . . . . . . . . 22
UDS1 circuit pack . . . . . . . . . . . . . . . . 118 ESS
auto fallback to primary . . . . . . . . . . . . . . . 21 mixed PNC . . . . . . . . . . . . . . . . . . 102

B F
bandwidth limitation . . . . . . . . . . . . . . . 236 Fax over IP
Best Service Routing (BSR) . . . . . . . . . . . 150 administration overview . . . . . . . . . . . . 190
bus bridge . . . . . . . . . . . . . . . . . . . . 123 overview . . . . . . . . . . . . . . . . . . . 187
Super G3 fax machine . . . . . . . . . . . . . 213
Fax pass through
C administration . . . . . . . . . . . . . . . . . 217
cabling bandwidths . . . . . . . . . . . . . . . . . . 197
metallic . . . . . . . . . . . . . . . . . . . . 78 considerations for configuration . . . . . . . . 194
Call Admission Control (CAC) . . . . . . . . . . 236 description . . . . . . . . . . . . . . . . . . 192
circuit packs encryption . . . . . . . . . . . . . . . . . . 198
control LAN (C-LAN) interface . . . . . . . . . . 18 rates . . . . . . . . . . . . . . . . . . . . . 192
C-LAN . . . . . . . . . . . . . . . . . . . . . . 18 Fax relay
circuit pack TN799DP . . . . . . . . . . . . . 122 administration . . . . . . . . . . . . . . . . . 217
installation . . . . . . . . . . . . . . . . . . 123 bandwidths . . . . . . . . . . . . . . . . . . 197
testing . . . . . . . . . . . . . . . . . . . . 124 considerations for configuration . . . . . . . . 194
CNOCL . . . . . . . . . . . . . . . . . . . . . . 111 description . . . . . . . . . . . . . . . . . . 192
combined port network . . . . . . . . . . . . . . 105 encryption . . . . . . . . . . . . . . . . . . 198
connecting switches . . . . . . . . . . . . . . . . 15 rates . . . . . . . . . . . . . . . . . . . . . 192
connection preservation . . . . . . . . . . . . . . 21 fiber
control network C . . . . . . . . . . . . . . . . 103 connections, metallic cabling . . . . . . . . . . . 78
Control Network on Customer LAN . . . . . . . . . 111 Fiber connections. . . . . . . . . . . . . . . . . . 74
control networks, mixing . . . . . . . . . . . . . . 82
converged networks . . . . . . . . . . . . . . . . 115
G
G250 Media Gateway . . . . . . . . . . . . . 22, 259
D G700/G350 Media Gateways . . . . . . . . . 18, 260
default gateway . . . . . . . . . . . . . . . . . 126 gateway
default node . . . . . . . . . . . . . . . . . . . 126 default . . . . . . . . . . . . . . . . . . . . 126
Dial Plan Transparency . . . . . . . . . . . . . 231
Duplicated bearer . . . . . . 44, 54, 57, 60, 63, 68, 71

Issue 12 February 2007 271

Index

migrations
TN570 circuit pack placements . . . . . . . . . . 52
H Mixed PNC . . . . . . . . . . . . . . . . . . . . . 79
H.248 auto fallback to primary . . . . . . . . . 21, 257 duplicated and single control . . . . . . . . . . . 82
H.248 link recovery . . . . . . . . . . . . . . . . 21 ESS in mixed PNC configuration . . . . . . . . 102
H.323 clear channel over IP . . . . . . . . . . . 187 examples . . . . . . . . . . . . . . . . . . . . 84
H.323 link recovery . . . . . . . . . . . . . . . . 21 MCC1 Media Gateway IP-PNC . . . . . . . . . . 94
H.323 Trunk MCC1 Media Gateway with multiple IP-PNC PNs
administration . . . . . . . . . . . . . . 137, 138 example
hardware interface . . . . . . . . . . . . . . . . . 18 multiple IP-PNC PNs in MCC1 Media Gateway
example . . . . . . . . . . . . . . . . . . 97
MCC1 Media Gateway with multiple mixed PNC PNs
I multiple mixed PNC PNs in MCC1 Media
Gateway . . . . . . . . . . . . . . 95, 96, 97
iClarity . . . . . . . . . . . . . . . . . . . 161, 162 MCC1 Media Gateway with multiple mixed PNC PNs
IGAR . . . . . . . . . . . . . . . . . . . . . . . 17 example
installation, C-LAN . . . . . . . . . . . . . . . . 123 multiple mixed PNC PNs in MCC1 Media
Inter-Gateway Alternate Routing (IGAR) . . . . . 17, 230 Gateway example. . . . . . . . . . . . . . 99
interworking media gateway combinations. . . . . . . . . . . 80
G250 . . . . . . . . . . . . . . . . . . . . 259 mixed ATM-connect and IP-PNC example . . . . 91
G350 . . . . . . . . . . . . . . . . . . . . 260 mixed CSS-connect and IP-PNC example . . . . 88
G700 . . . . . . . . . . . . . . . . . . . . 260 mixed direct-connect and IP-PNC example . . . . 84
IP codec sets, administering . . . . . . . . . . . 213 mixed reliability example . . . . . . . . . . . . . 91
IP interface . . . . . . . . . . . . . . . . . . . 144 mixed reliability with IP-PNC example. . . . . . . 86
IP interfaces . . . . . . . . . . . . . . . . . . . 141 possible mixes . . . . . . . . . . . . . . . . . 80
IP network regions . . . . . . . . . . . . . . . . 220 reliability options . . . . . . . . . . . . . . . . 82
IP Softphone requirements . . . . . . . . . . . . . . . . . . 82
administration . . . . . . . . . . . . . . . . 159 MM710 T1/E1 Media Module . . . . . . . . . . . 117
Alternate Gatekeeper . . . . . . . . . . . . . 126 MM760 VoIP Media Module . . . . . . . . . . 19, 134
IP telephone . . . . . . . . . . . . . . . . . . . 163 Modem over IP
administration . . . . . . . . . . . . . . . . 165 administration overview . . . . . . . . . . . . 190
IP-PNC PNs in MCC1 example . . . . . . . . . . . 97 overview . . . . . . . . . . . . . . . . . . . 187
IP-PNC with MCC1 Media Gateway . . . . . . . . . 94 Modem pass through
administration . . . . . . . . . . . . . . . . . 217
bandwidths . . . . . . . . . . . . . . . . . . 197
J considerations for configuration . . . . . . . . 194
jitter . . . . . . . . . . . . . . . . . . . . . . . . 17 description . . . . . . . . . . . . . . . . . . 193
encryption . . . . . . . . . . . . . . . . . . 198
rates . . . . . . . . . . . . . . . . . . . . . 193
L Modem relay
administration . . . . . . . . . . . . . . . . . 217
link recovery . . . . . . . . . . . . . . . . . . . . 21 bandwidths . . . . . . . . . . . . . . . . . . 197
load balanced TN2602AP circuit packs . . . . . . 141 considerations for configuration . . . . . . . . 194
local survivable processor . . . . . . . . . . . . . 22 description . . . . . . . . . . . . . . . . . . 193
LSP . . . . . . . . . . . . . . . . . . . . . . . . 22 encryption . . . . . . . . . . . . . . . . . . 198
rates . . . . . . . . . . . . . . . . . . . . . 193
M
MCC1 Media Gateway N
circuit pack placements . . . . . . . . . . . . . 50 NAT . . . . . . . . . . . . . . . . . . . . . . . 174
IP-PNC . . . . . . . . . . . . . . . . . . . . 97 Network Address Translation . . . . . . . . . . . 174
media encryption . . . . . . . . . . . . . . . . 246 NAPT . . . . . . . . . . . . . . . . . . . . . 176
FAX, modem, and TTY . . . . . . . . . . . . 198 NAT and H.323 issues . . . . . . . . . . . . . 176
SRTP . . . . . . . . . . . . . . . . . . . . 198 Nat Shuffling feature . . . . . . . . . . . . . . 176
support by . . . . . . . . . . . . . . . . . . 247 types of NAT . . . . . . . . . . . . . . . . . 175
network regions, IP . . . . . . . . . . . . . . . . 220

272 Administration for Network Connectivity for Avaya Communication Manager

 Index

node
default . . . . . . . . . . . . . . . . . . . . 126
node names, assigning . . . . . . . . . . . . . . 140
S
S8500
direct-connect PNC . . . . . . . . . . . . . . . 29
O IP-PNC . . . . . . . . . . . . . . . . . . . . . 26
overview S8700-series
converged networks . . . . . . . . . . . . . . 115 ATM-connect PNC . . . . . . . . . . . 63, 68, 71
CSS-connect PNC. . . . . . . . . . . . 52, 57, 60
direct-connect PNC . . . . . . . . . . . 42, 46, 48
P duplicated bearer . . . . . . . . . . . . . . 60, 71
duplicated control . . . . . . . . . . . . . . 48
Pass through mode for fax, modem, TTY over IP . 188 duplicated control . . . 36, 38, 40, 46, 57, 60, 68, 71
Per Hop Behaviors (PHBs) . . . . . . . . . . . . 209 IP-PNC . . . . . . . . . . . . . . . 33, 36, 38, 40
plans . . . . . . . . . . . . . . . . . . . . . . 204 SCC1
port address translation (PAT) . . . . . . . . . . 176 Media Gateway circuit pack placements . . . . . 50
port network connectivity . . . . . . . . . . . . . . 23 Session Initiation Protocol (SIP) . . . . . . . . . . 137
ESS in mixed PNC configuration . . . . . . . . 102 shuffled connections . . . . . . . . . . . . . . . 208
examples of mixing . . . . . . . . . . . . . . . 84 signaling group . . . . . . . . . . . . . . . . 150, 156
fiber lengths . . . . . . . . . . . . . . . . . . 74 SIP trunks . . . . . . . . . . . . . . . . . . . . 137
length of fiber connections. . . . . . . . . . . . 74 SLS . . . . . . . . . . . . . . . . . . . . . . . . 22
MCC1 Media Gateway IP-PNC . . . . . . . . . 94 spanning tree protocol (STP) . . . . . . . . . 16, 243
MCC1 Media Gateway with IP-PNC PNs example 97 SRTP media encryption . . . . . . . . . . . . . . 199
MCC1 Media Gateway with multiple mixed for FAX, modem and TTY . . . . . . . . . . . 198
PNC PNs . . . . . . . . . . . . . . . 95, 96, 97
Standard Local survivability (SLS) . . . . . . . . . . 22
MCC1 Media Gateway with multiple mixed PNC PNs
example . . . . . . . . . . . . . . . . . . . 99 STP . . . . . . . . . . . . . . . . . . . . . 16, 243
mixed ATM-connect and IP-PNC example . . . . 91 Super G3 fax machine . . . . . . . . . . . . . . 213
mixed CSS-connect and IP-PNC example . . . . 88 survivability . . . . . . . . . . . . . . . . . . . . 21
mixed direct-connect and IP-PNC example . . . . 84
mixed port network connectivity . . . . . . . . . 79
mixed reliability example . . . . . . . . . . . . 91 T
mixed reliability with IP-PNC example . . . . . . 86 T.38 fax
requirements for mixing . . . . . . . . . . . . . 82 administration . . . . . . . . . . . . . . . . . 217
S8500 bandwidths . . . . . . . . . . . . . . . . 197, 198
direct-connect PNC . . . . . . . . . . . . . 29 considerations for configuration . . . . . . . . 194
IP-PNC . . . . . . . . . . . . . . . . . . . 26 description . . . . . . . . . . . . . . . . . . 191
S8700-series overview . . . . . . . . . . . . . . . . . . . 187
ATM-connect PNC . . . . . . . . . . 63, 68, 71 rates . . . . . . . . . . . . . . . . . . . . . 191
CSS-connect PNC . . . . . . . . . . 52, 57, 60 task
direct-connect PNC . . . . . . . . . 42, 46, 48 assign node names . . . . . . . . . . . . . . 125
IP-PNC . . . . . . . . . . . . . 33, 36, 38, 40 telephone, IP . . . . . . . . . . . . . . . . . . . 163
TN570 circuit pack placements . . . . . . . 50, 52 TN2302AP . . . . . . . . . . . . . . . . . . . . 128
TN2312BP (IPSI) . . . . . . . . . . . . . . . 18, 133
TN2464CP . . . . . . . . . . . . . . . . . . . . 117
Q TN2602AP circuit pack
QoS. . . . . . . . . . . . . . . . . . . . . . . . 17 administer for duplication . . . . . . . . . . . 144
Quality of Service (QoS) . . . . . . . . . . . . . . 17 administer for load balancing . . . . . . . . . . 141
TN2602AP features . . . . . . . . . . . . . . . . 132
TN2602AP IP Media Resource 320 . 18, 129, 141, 144
R TN464HP . . . . . . . . . . . . . . . . . . . . 117
TN570 circuit pack placements . . . . . . . . . . . 50
Rapid Spanning Tree. . . . . . . . . . . . . . 16, 244
TN799 (C-LAN)
Relay mode for fax, modem, TTY over IP . . . . . 187
Alternate Gatekeeper . . . . . . . . . . . 18, 126
reliability with mixed PNC. . . . . . . . . . . . . . 82
TN8400AP Media Server . . . . . . . . . . . 18, 135
TN8412AP (SIPI) . . . . . . . . . . . . . . . 18, 135

Issue 12 February 2007 273

Index

trunk group . . . . . . . . . . . . . . . . . . . 154

trunks
H.323 . . . . . . . . . . . . . . . . . . . . 137
U
SIP . . . . . . . . . . . . . . . . . . . . . 137 UDS1 circuit pack, administration . . . . . . . . . 118
TTY over IP Universal DS1 (UDS1) circuit pack . . . . . . . . . 117
administration overview . . . . . . . . . . . . 190 User Datagram Protocol (UDP) . . . . . . . . 245, 268
overview . . . . . . . . . . . . . . . . . . . 187
TTY pass through
administration . . . . . . . . . . . . . . . . 217 V
bandwidths . . . . . . . . . . . . . . . . . . 197 Virtual Local Area Networks (VLANs) . . . . . . . 210
considerations for configuration . . . . . . . . 194 Voice Activity Detection (VAD). . . . . . . . . . . 204
description . . . . . . . . . . . . . . . . . . 193
encryption . . . . . . . . . . . . . . . . . . 198
rates . . . . . . . . . . . . . . . . . . . . . 193
TTY relay
administration . . . . . . . . . . . . . . . . 217
bandwidths . . . . . . . . . . . . . . . . . . 197
considerations for configuration . . . . . . . . 194
description . . . . . . . . . . . . . . . . . . 192
encryption . . . . . . . . . . . . . . . . . . 198
rates . . . . . . . . . . . . . . . . . . . . . 192

274 Administration for Network Connectivity for Avaya Communication Manager