Copyright and Technical Support

Universal Socket Connectivity

Hardware Guide for Developers, PN S000584 Rev 2
For the following products (The list indicates base models for each product. See each product chapter product build
options):
Embedded Wireless Modems
SocketModem Cell – MTSMC-G2
SocketModem iCell – MTSMC-G2-IP
SocketModem CDMA – MTSMC-C
SocketModem EDGE – MTSMC-E
Socket Modem HSDPA – MTSMC-H
Embedded Analog Modems
SocketModem – MT9234SMI
SocketModem – MT5600SMI
SocketModem – MT5656SMI
SocketModem IP – MT5656SMI-IP
SocketModem – MT2492SMI
SocketModem – MT2456SMI-22
Embedded Device Servers
SocketModem IP – MT100SEM-IP
SocketWireless Wi-Fi – MT800SWM
SocketWireless Bluetooth – MTS2BTSMI

Copyright
This publication may not be reproduced, in whole or in part, without prior expressed written permission from Multi-Tech
Systems, Inc. All rights reserved.
Copyright © 2004-9 by Multi-Tech Systems, Inc. Russian Approval updated 2017.
Multi-Tech Systems, Inc. makes no representations or warranties with respect to the contents hereof and specifically disclaim
any implied warranties of merchantability or fitness for any particular purpose. Furthermore, Multi-Tech Systems, Inc. reserves
the right to revise this publication and to make changes from time to time in the content hereof without obligation of Multi-Tech
Systems, Inc. to notify any person or organization of such revisions or changes. See the Multi-Tech Web site for current
revisions of documentation.

Trademarks
Trademarks and Registered Trademarks of Multi-Tech Systems, Inc. are SocketModem, SocketWireless, SocketEthernet
IP, and the Multi-Tech logo.
Microsoft and Windows are trademarks or registered trademarks of Microsoft Corporation in the United States and other
countries. Bluetooth is a registered trademark of the Bluetooth SIG, Inc. Wi-Fi is a registered trademark of the Wi-Fi Alliance.

Patents
This device covered by one or more of the following patents: 6,031,867; 6,012,113; 6,009,082; 5,905,794; 5,864,560;
5,815,567; 5,815,503; 5,812,534; 5,809,068; 5,790,532; 5,764,628; 5,764,627; 5,754,589; 5,724,356; 5,673,268; 5,673,257;
5,644,594; 5,628,030; 5,619,508; 5,617,423; 5,600,649; 5,592,586; 5,577,041; 5,574,725; 5,559,793; 5,546,448; 5,546,395;
5,535,204; 5,500,859; 5,471,470; 5,463,616; 5,453,986; 5,452,289; 5,450,425; 5,355,365; 5,309,562; 5,301,274. Other
Patents Pending.

Warranty and Repairs Statement

Please see the Multi-Tech Systems, Inc. Web site for the current Warranty and Repairs Statement.
http://www.multitech.com/COMPANY/Policies/warranty/

World Headquarters
Multi-Tech Systems, Inc.
2205 Woodale Drive
Mounds View, Minnesota 55112
Phone: 763-785-3500 or 800-328-9717
Fax: 763-785-9874
Internet Address: http://www.multitech.com

Technical Support
Country By Email By Phone
Europe, Middle East, Africa: support@multitech.co.uk +(44) 118 959 7774
U.S., Canada, all others: support@multitech.com 800-972-2439 or 763-717-5863

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 2
 Table of Contents

PART I – UNIVERSAL SOCKET CONNECTIVITY

Part 1 Universal Socket Connectivity ................................................................................................ 8

Chapter 1 – Universal Socket Connectivity ........................................................................................ 9

Multi-Tech Embedded Solutions .................................................................................................................. 9
Universal Socket Connectivity Features ................................................................................................... 9
The Universal Socket Design .................................................................................................................... 9
Universal Developer Kit Contents ........................................................................................................... 10
AT Commands for All Embedded Products Are Included on the Developer CD ..................................... 10
Universal Socket Pin Out ............................................................................................................................ 11
Universal Pin Descriptions ...................................................................................................................... 11
Design Considerations ................................................................................................................................ 15
Noise Suppression Design Considerations ............................................................................................. 15
PC Board Layout Guidelines ................................................................................................................... 15
Electromagnetic Interference (EMI) Considerations ............................................................................... 16
Electrostatic Discharge Control ............................................................................................................... 16
Phone Line Warning Statement for the Developer Board ....................................................................... 16
Mechanical Drawing in Inches for All Products ........................................................................................ 17
Mechanical Drawing in Millimeters for All Products ................................................................................. 18
Maximum Component Height / PCB Length and Width ............................................................................ 19
SocketModem Developer Board ................................................................................................................. 20
Board Components ................................................................................................................................. 21
Jumpers and Corresponding Signals ...................................................................................................... 21
SocketModem Developer Board Block Diagram ..................................................................................... 22
Developer Board Schematics ................................................................................................................. 23
Developer Board Schematics ................................................................................................................. 24
Developer Board Schematics ................................................................................................................. 25
Developer Board Schematics ................................................................................................................. 26
Developer Board Schematics ................................................................................................................. 27
Upgrading Firmware .................................................................................................................................... 28
XMODEM Serial Port Upgrade ............................................................................................................... 29
Multi-Tech Systems, Inc. Flash Programming Protocol .......................................................................... 30
Wireless Information ................................................................................................................................... 33
Antenna System for Wireless Devices .................................................................................................... 33
Account Activation for Wireless Devices ................................................................................................. 36
Wireless Approvals and Labeling Requirements .................................................................................... 36
Analog Information ...................................................................................................................................... 38
Recommended Parts for Analog SocketModems ................................................................................... 38
Analog Labeling Requirements ............................................................................................................... 39
Safety Notices and Warnings ...................................................................................................................... 42
Wireless Safety ....................................................................................................................................... 42
Analog Telecom Safety Warning ............................................................................................................ 43
Telecom Approvals for Analog Modems ................................................................................................. 44
Regulatory Compliance Statements ........................................................................................................... 45
Country/Region-Specific Statements ...................................................................................................... 45
Waste Electrical and Electronic Equipment Statement ........................................................................... 50
Restriction of the Use of Hazardous Substances (RoHS) ....................................................................... 51
Information on HS/TS Substances according to Chinese Standards in English ..................................... 52
Information on HS/TS Substances According to Chinese Standards in Chinese .................................... 53

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 3
 Table of Contents

PART 2 – WIRELESS SOCKETMODEMS ....................................................54

Chapter 2 – SocketModem Cell (MTSMC-G2) & SocketModem iCell (MTSMC-G2-IP) ..............55
Introduction .................................................................................................................................................. 55
Product Build Options and Ordering Information ..................................................................................... 55
AT Commands Reference Guides .............................................................................................................. 55
Technical Specifications ............................................................................................................................. 56
Electrical Characteristics ............................................................................................................................ 57
Power Consumption .................................................................................................................................... 57
Mechanical Drawings – Basic Build ........................................................................................................... 58
Mechanical Drawings – IP Build ................................................................................................................. 60
Mechanical Drawings – GPS Build ............................................................................................................. 61
Application Notes ........................................................................................................................................ 62
Flashing LED InterfaceR ......................................................................................................................... 62
RF Performances .................................................................................................................................... 62
RF Connection and Antenna................................................................................................................... 62
Microphone Inputs .................................................................................................................................. 62
Changing the Quad Band ....................................................................................................................... 63
Global Positioning System (GPS) ............................................................................................................... 64
Technical Specifications ......................................................................................................................... 64
Features.................................................................................................................................................. 64
Underwriters Laboratories Required Global Positioning System (GPS) Statement ................................ 64

Chapter 3 – SocketModem® CDMA (MTSMC-C) ...............................................................................65

Introduction .................................................................................................................................................. 65
Product Build Options and Ordering Information ..................................................................................... 65
AT Commands Reference Guides .............................................................................................................. 65
Technical Specifications ............................................................................................................................. 66
Mechanical Drawings .................................................................................................................................. 67
Electrical Characteristics ............................................................................................................................ 68
Power Consumption* ................................................................................................................................... 68
Application Notes ........................................................................................................................................ 69
Flashing LED Interface ........................................................................................................................... 69
RF Interface ............................................................................................................................................ 69
RF Connection and Antenna................................................................................................................... 69
Provisioning a Generic SocketModem CDMA ........................................................................................ 70
CDMA Terminology and Acronyms ......................................................................................................... 71

Chapter 4 – SocketModem® EDGE (MTSMC-E) ................................................................................73

Introduction .................................................................................................................................................. 73
Product Build Options and Ordering Information ..................................................................................... 73
AT Commands Reference Guide ................................................................................................................ 73
Technical Specifications ............................................................................................................................. 74
Mechanical Drawings .................................................................................................................................. 75
Pin Out .......................................................................................................................................................... 76
Electrical Characteristics ............................................................................................................................ 77
Power Consumption* ................................................................................................................................... 77
Application Notes ........................................................................................................................................ 78
RF Performances .................................................................................................................................... 78
RF Connection and Antenna................................................................................................................... 78
Audio Interface – Electrical Characteristics............................................................................................. 78
Microphone Inputs .................................................................................................................................. 78

Chapter 5 – SocketModem® HSDPA (MTSMC-H) .............................................................................79

Introduction .................................................................................................................................................. 79
Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 4
 Table of Contents
Product Build Options and Ordering Information ..................................................................................... 79
AT Commands Reference Guide ................................................................................................................ 79
Technical Specifications ............................................................................................................................. 80
Mechanical Drawings – Basic Build ........................................................................................................... 82
Mechanical Drawings – USB Build ............................................................................................................. 83
Electrical Characteristics ............................................................................................................................ 84
Power Consumption* ................................................................................................................................... 84
Application Notes ........................................................................................................................................ 85
RF Performances .................................................................................................................................... 85
RF Connection and Antenna................................................................................................................... 85
Air Interface ............................................................................................................................................ 85
Configuring the HSDPA Modem on Linux SLAX 6 .................................................................................. 87

PART 3 – ANALOG SOCKETMODEMS ..................................................... 93

Chapter 6 – SocketModem® (MT9234SMI) ........................................................................................94
Introduction .................................................................................................................................................. 94
Product Build Options and Ordering Information ..................................................................................... 94
AT Commands Reference Guide ................................................................................................................ 94
Technical Specifications ............................................................................................................................. 95
SocketModem Pin Out ................................................................................................................................. 97
Serial Pin Out.......................................................................................................................................... 97
Parallel Pin Out ....................................................................................................................................... 98
Electrical Characteristics ............................................................................................................................ 99
Parallel Timing Requirements ................................................................................................................... 100
SocketModem Parallel Interface ............................................................................................................... 101
Application Notes ...................................................................................................................................... 108
Tip and Ring Interface........................................................................................................................... 108

Chapter 7 – SocketModem® (MT5600SMI and MT5656SMI) ..........................................................109

Introduction ................................................................................................................................................ 109
Product Build Options and Ordering Information ................................................................................... 109
AT Commands Reference Guide .............................................................................................................. 110
Technical Specifications ........................................................................................................................... 110
SocketModem Pin Out ............................................................................................................................... 112
Electrical Characteristics .......................................................................................................................... 114
Parallel Host Bus Timing Table ................................................................................................................ 115
SocketModem Parallel Interface ............................................................................................................... 116
Register Functional Definitions ................................................................................................................ 117
Application Notes ...................................................................................................................................... 126
Tip and Ring Interface........................................................................................................................... 126
Microphone and Speaker ...................................................................................................................... 127

Chapter 8 – SocketModem® IP (MT5656SMI-IP) .............................................................................128

Introduction ................................................................................................................................................ 128
Product Build Options and Ordering Information ................................................................................... 128
AT Commands Reference Guide .............................................................................................................. 128
Technical Specifications ........................................................................................................................... 129
SocketModem Pin Out ............................................................................................................................... 131
Electrical Characteristics .......................................................................................................................... 132
Application Notes ...................................................................................................................................... 133
Tip and Ring Interface........................................................................................................................... 133

Chapter 9 – SocketModem® (MT2492SMI) ......................................................................................134

Introduction ................................................................................................................................................ 134

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 5
 Table of Contents
Product Build Options and Ordering Information ................................................................................... 134
AT Commands Reference Guide .............................................................................................................. 134
Technical Specifications ........................................................................................................................... 135
SocketModem Pin Out ............................................................................................................................... 136
Electrical Characteristics .......................................................................................................................... 136
Application Notes ...................................................................................................................................... 137
Tip and Ring Interface........................................................................................................................... 137

Chapter 10 – SocketModem (MT2456SMI-22) ................................................................................138

Introduction ................................................................................................................................................ 138
Product Ordering Information ................................................................................................................... 138
Technical Specifications ........................................................................................................................... 139
SocketModem Configuration .................................................................................................................... 140
Serial Configuration .............................................................................................................................. 140
Electrical Characteristics .......................................................................................................................... 141
3.3V Serial SocketModem .................................................................................................................... 141
5V Serial SocketModem ....................................................................................................................... 141
Applications Notes .................................................................................................................................... 142
Tip and Ring Interface........................................................................................................................... 142

PART 4 – EMBEDDED DEVICE SERVERS .............................................. 143

Chapter 11 – SocketEthernet IP (MT100SEM-IP) ...........................................................................144
Introduction ................................................................................................................................................ 144
Product Build Options and Ordering Information ................................................................................... 144
AT Commands Reference Guide .............................................................................................................. 144
Technical Specifications ........................................................................................................................... 145
SocketModem Pin Out ............................................................................................................................... 146
Electrical Characteristics .......................................................................................................................... 147
Power* Measurements ............................................................................................................................... 147
Application Notes ...................................................................................................................................... 148
Ethernet Interface – Non-Isolated Design ............................................................................................. 148
Ethernet Interface – Isolated Design ..................................................................................................... 148
Recommended Parts ............................................................................................................................ 148
The Windows-Based Auto-Discovery Manager .................................................................................... 149

Chapter 12 – SocketWireless® Wi-Fi® (MT800SWM) ......................................................................151

Introduction ................................................................................................................................................ 151
Product Build Options and Ordering Information ................................................................................... 151
AT Commands Reference Guide .............................................................................................................. 151
Technical Specifications ........................................................................................................................... 152
SocketWireless Wi-Fi Pin Out ................................................................................................................... 153
Mechanical Drawings ................................................................................................................................ 154
Electrical Characteristics .......................................................................................................................... 154
Application Notes ...................................................................................................................................... 155
RF Interface .......................................................................................................................................... 155
Default Power Up Settings .................................................................................................................... 155
Sources for Peripheral Devices ............................................................................................................ 155
Regulatory Requirements for the Wi-Fi Antenna .................................................................................. 156

Chapter 13 – SocketWireless® Bluetooth (MTS2BTSMI) ...............................................................157

Introduction ................................................................................................................................................ 157
Notes about Byte Gaps and Data Latency ............................................................................................... 157
Product Build Options and Ordering Information ................................................................................... 157
AT Commands Reference Guide .............................................................................................................. 157
Technical Specifications ........................................................................................................................... 158
Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 6
 Table of Contents
SocketWireless Bluetooth Pin Out ........................................................................................................... 159
Electrical Characteristics .......................................................................................................................... 159
Application Notes ...................................................................................................................................... 160
RF Interface .......................................................................................................................................... 160
Sources for Peripheral Devices ............................................................................................................ 160
Default Power Up Settings .................................................................................................................... 161
Example of a Master Discovery/Connection Sequence ........................................................................ 162
Example of a Slave Command Sequence ............................................................................................ 162
Disabling Flow Control Using AT Commands ....................................................................................... 163
Other Examples .................................................................................................................................... 163
Changing Configuration ........................................................................................................................ 163

Index ...................................................................................................................................................164

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 7
 Part 1
Universal Socket Connectivity

–
Part 1  Universal Socket Connectivity Chapter 1 – Universal Socket Connectivity

Multi-Tech’s embedded device networking solutions instantly add communication ability to your existing or new product with
minimal engineering effort giving you an edge on your competition while accelerating your time-to-market. Our universal
socket family of embedded solutions is designed around a flexible comm-port architecture to provide analog dial-up, cellular,
Wi-Fi or Bluetooth wireless, or Ethernet socket connectivity with interchangeable socket devices. This means you can utilize
one system design and populate it with your preferred connectivity option giving you flexibility and a seamless migration path
to future technologies.

 Flexible comm-port architecture

 Interchangeable socket devices
 Cost-effective system design
 Easy migration to future technologies
 Complete global compliance

Each pin on a SocketModem corresponds to a particular function. The universal socket design provides a
universal location for each function pin. This allows each SocketModem to be used in a common board.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 9
Part 1  Universal Socket Connectivity Chapter 1 – Universal Socket Connectivity

Products described in this guide can be used to develop and evaluate your products and applications using the
MTSMI-UDK (Universal Developer Kit).

 Developer Board: One MTSMI-UDK Developer Board

 Power Supply: One 100-240V 9V-1A power supply with removable blades:
 One US blade/plug
 One EURO blade/plug
 One UK blade/plug
 Cables
 One RJ-45 Ethernet cable
 One RJ-11 phone cable
 One DB9F-DB25M serial cable
 One 1.5 meter USB cable
 Antenna Cables
 One SMA-to-MMCX antenna cable (for cellular antennas)
 One SMA-to-UFL antenna cable (for select cellular antennas)
 One RSMA-to-MMCX antenna cable (for Bluetooth / Wi-Fi antennas)
 Antennas
 One quad band antenna 850/1900/900/1800 (for cellular modems)
 One 2.4GHz, ½ WAVE antenna with reverse polarity (for Bluetooth and Wi-Fi devices)
 Modem Activation Customer Notices
 Aeris
 CDMA
 Sprint
 Verizon
 GSM
 One Universal Socket Connectivity Developer CD
 One Promotional Screwdriver

AT Commands
Multi-Tech provides Reference Guides for each SocketModem's AT commands. These reference guides are
available on the CD included in the Developer Kit. They are also available by email at
mailto:oemsales@multitech.com or by using the Developer Guide Request Form on Multi-Tech's Web site.

Fax Commands for Analog Modems

Fax Commands are included in the AT Command Reference Guide when applicable to the product. They are
available on the CD included in the Developer Kit.
Note: Fax Commands supported by product:
 SocketModem MT9234SMI supports all Class 1 and Class 2 commands (Class 1, 1.0, 2, 2.0/2.1)
 SocketModem MT5656SMI supports Class 1 & 2 (does not support 1.0, 2.0, 2.1)
 SocketModem MT5600SMI supports Class 1 & 1.0

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 10
Part 1  Universal Socket Connectivity Chapter 1 – Universal Socket Connectivity

Top View – Universal SocketModem Pin Out

Pin Signal In/Out Description

Name
1 Tip I/O Tip Signal from Telco. Tip connection to the phone line (RJ-11 Pin 4). The
SocketModem is Tip/Ring polarity insensitive.
2 Ring I/O Ring Signal from Telco. Ring connection to the phone line (RJ-11 Pin 3). The
SocketModem is Tip/Ring polarity insensitive.
3 Safety NA Safety Clearance. 2.5 mm is required between TNV circuits and SELV circuits.
Void
4 TX+ O Transmit Outputs (TX+ and TX-). Differential transmit outputs for Ethernet and ISDN.
5 TX- O Transmit Outputs (TX+ and TX-). Differential transmit outputs for Ethernet and ISDN.
6 RX- I Receive Inputs. Differential receive input pins for Ethernet. Dummy pin for
MT800SWM.
7 RX+ I Receive Inputs. Differential receive input pins for Ethernet.
8 Safety NA Safety Clearance. 2.5 mm is required between TNV circuits and SELV circuits.
Void
9 Dummy Dummy pin for EDGE.
11 TCLK O Transmit Data Sync Clock. TX synchronous data clock for ISDN sync data mode.
12 RCLK O Receive Data Sync Clock. RX synchronous data clock for ISDN sync data mode.
22 MIC+ I Microphone positive input. See microphone sections in GPRS, CDMA, EDGE
chapters.
23 MIC- I Microphone negative input. See microphone sections in GPRS, CDMA, EDGE
chapters.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 11
Part 1  Universal Socket Connectivity Chapter 1 – Universal Socket Connectivity

Pin Signal In/Out Description

Name
24 –RESET* I Device Reset (with pull-up). The active low –RESET input resets the device logic
and returns the configuration of the device to the original factory default values or
"stored values" in the NVRAM. –RESET is tied to VCC through a time-constant
circuit for “Power-on-Reset” functionality. The SocketModem is ready to accept
commands after a fixed amount of time (“X” Time) after power-on or reset.
Model Time Constant "X" Time Minimum Reset Pulse*
MTSMC-G2 250 ms 6 seconds 100us
MTSMC-C 250 ms 3-15 seconds 500us
MTSMC-E 250 ms 3-15 seconds 500us
MTSMC-H 250 ms 10 seconds 100us
MT9234SMI 400 ms 6 seconds 100us
MT5600/5656SMI 250 ms 6 seconds 100us
MT2492SMI 250 ms 6 seconds 100us
MT100SEM-IP 250 ms 6 seconds 100us
MT800SWM 250 ms 6 seconds 100us
MTS2BTSMI 250 ms 6 seconds 100us
*The SocketModem device may respond to a shorter reset pulse.
Reset Line Interface for the MT5656SMI. The modem’s reset line employs a .01uF
cap and a 10K pull up resistor. Care must be taken to ensure the system the
modem is place into is not affected by the added capacitance of the reset line. It is
not advisable to use an open collector driver in the embedded system's reset
circuitry to drive a reset signal to the embedded modem and other I.C.s in the
customer’s design. Rather, if an open collector driver is to be used, run that output
to the modem only and use a separate driver for other embedded components. The
modem’s reset signal may also be driven by a circuit that both sinks and sources
current if desired.
It is also important to note that these modems do not require an external reset. They
have their own internal reset circuitry and voltage monitor and will function correctly
even if the reset input is open.
Reset GPRS and CDMA (MTSMC-G2 and MTSMC-C). This signal is used to force
a reset procedure by providing low level during reset of at least 500us. The signal is
considered an emergency reset only. A reset procedure is already driven by internal
hardware during the power-up sequence. If no external reset is necessary, this input
can be left open. If used (emergency reset), it has to be driven by an open collector
or an open drain.
Reset EDGE with pull-up (MTSMC-E). The active low –RESET input resets the
device logic and returns the configuration of the device to the original factory default
values of "stored values" in the NVRAM. –RESET is tied to VCC through a time-
constant circuit for “Power-on-Reset” functionality. The SocketModem is ready to
accept commands after a fixed amount of time after power-on or reset.
25 USB_VBUS I USB Voltage Sense. Senses the voltage level of the USB to determine if the bus is
available.
26 GND GND Logic Ground.
27 USB_DP I/O USB Data Positive. Positive pin of the USB data pair.
28 USB_DN I/O USB Data Negative. Negative pin of the USB data pair.
29 LED DCD O DCD (Active High). Output from 74LCX14 with a 1000 Ohms resistor in series.
SocketWireless Bluetooth (MTS2BTSMI): When lit, indicates a connection. No
series resistor.
30 LED RX O RX (Active High). Output from 74LCX14 with a 1000 Ohms resistor in series.
SocketWireless Bluetooth (MTS2BTSMI): No series resistor.
31 LED DTR O DTR (Active High). Output from 74LCX14 with a 1000 Ohms resistor in series.
SocketWireless Bluetooth (MTS2BTSMI): No series resistor.
32 LED TX O TX (Active High). Output from 74LCX14 with a 1000 Ohms resistor in series.
SocketWireless Bluetooth (MTS2BTSMI): No series resistor.
33 –RTS I Request to Send (Active Low). –RTS is controlled by the DTE to indicated
whether or not the DTE is ready to receive data. –RTS ON (low) indicates that the
DTE is ready to receive data from the modem on RXD. –RTS OFF indicates to the
SocketModem that it should not transfer data on the RXD.
In the command state, the modem ignores –RTS.
Note: When the –RTS pin is not in use, it should be tied low.
* RESET – A Design Consideration: Allowing the host processor to control the RESET line of the SocketModem provides the
benefit of allowing the host to reset the device in the event of a failure to respond normally. Resetting the SocketModem will
return it to a known functional state.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 12
Part 1  Universal Socket Connectivity Chapter 1 – Universal Socket Connectivity

Pin Signal In/Out Description

Name
34 –RXD O Received Data. The SocketModem uses the RXD line to send data to the DTE and
to send SocketModem responses to the DTE. In command mode, –RXD data
presents the SocketModem responses to the DTE. SocketModem responses take
priority over incoming data when the two signals are in competition for –RXD. When
no data is transmitted, the signal is held in mark condition.
35 –TXD I Transmitted Data. The DTE uses the –TXD line to send data to the SocketModem
for transmission or to transmit commands to the SocketModem. The DTE holds this
circuit in mark state when no data is being transmitted or during intervals between
characters.
36 –RI O RING (Active Low). Incoming ring signal from phone.
Ring Indicate. –RI output ON (low) indicates the presence of an ON segment of a
ring signal on the telephone line. The modem will not go off-hook when –RI is active;
the modem waits for –RI to go inactive before going off-hook.
SocketWireless Bluetooth (MTS2BTSMI). Strobes 1/sec for slave indication.
37 –DSR O Data Set Ready (Active Low). –DSR indicates SocketModem status to the DTE. –
DSR OFF (high) indicates that the DTE is to disregard all signals appearing on the
interchange circuits except Ring Indicator (–RI). It reflects the status of the local
data set and does not indicate an actual link with any remote data equipment.
38 –CTS O Clear to Send (Active Low). –CTS is controlled by the SocketModem to indicate
whether or not the SocketModem is ready to transmit data. –CTS ON indicates to
the DTE that signals on TXD will be transmitted. –CTS OFF indicates to the DTE
that it should not transfer data on TXD.
39 –DCD O Data Carrier Detect (Active Low). –DCD output is ON (low) when a data
connection is established and the SocketModem is ready to send/receive data.
40 –DTR I Data Terminal Ready (Active Low). The –DTR input is turned ON (low) when the
DTE is ready to communicate. –DTR ON prepares the modem to be connected, and,
once connected, maintains the connection. –DTR OFF places the modem in the
disconnect state under control of the &Dn and &Qn commands.
Note: When the –DTR pin is not in use, it should be tied low.
41 GND GND Logic Ground.
42 SPK- O Wireless GPRS, CDMA, and EDGE. Negative analog speaker output.
43 SPK+ O Wireless GPRS, CDMA, and EDGE. Positive analog speaker output.
48 GPIO I/O General Purpose Input/Output. User-configurable input or output pin.
49 GPIO I/O General Purpose Input/Output. User-configurable input or output pin.
50 GPIO I/O General Purpose Input/Output. User-configurable input or output pin.
51 GPIO I/O General Purpose Input/Output. User-configurable input or output pin.
56 –LED O LED Full Duplex (Active Low). LED Output. During normal operation, this pin lights
FDX the FDX LED to indicate a full duplex mode.
57 –LED O LED Active (Active Low). LED Output. During normal operation, this pin lights the
ACT Activity LED when transmitting or receiving. It flashes at a rate of 50ms high and
50ms low when active.
58 – O LED LINK (Active Low). LED Output. During normal operation, this pin lights the
LEDLINK LINK LED to indicate a good link is detected.

Pin 58 LED Mode Operating Status

Note: Pin 58 may or may not be available on some EDGE/GPRS/CDMA SocketModems currently
shipping.
Off Subscriber Carrier Mode is OFF or running in SLEEP mode or
Alarm mode.
600 ms ON / 600ms OFF No SIM card inserted or no PIN entered, or network search in
progress, or ongoing user authentication, or network login in
progress.
75 ms ON / 75 ms OFF / 75 ms ON One or more EDGE/GPRS/CDMA contexts activated.
3 s OFF Indicates EDGE/GPRS/CDMA data transfer: When a transfer is
Flashing in progress, the LED goes on within 1 second after data
packets were exchanged. Flash duration is approximately 0.5 s.
ON Depending on type of call:
Voice Call: Connected to remote party.
Data Call: Connected to remote party or exchange of
parameters while setting up or disconnecting a call.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 13
Part 1  Universal Socket Connectivity Chapter 1 – Universal Socket Connectivity

Pin Signal In/Out Description

Name
59 – O LED Collision (Active Low). LED Output. During normal operation, this pin lights
LEDCOL the COL LED to indicate a collision. It flashes at 50ms high and 50ms low when
active.
60 – O LED Speed (Active Low). LED Output. During normal operation, this pin lights the
LEDSPD SPEED LED to indicate 100Mbps is selected.
61 VCC PWR DC Input Power. 3.3V or 5VDC power, depending upon the build.
62 MICV I Single-Ended Microphone. Single-ended microphone input for dial-up
SocketModem speakerphone and TAM functions.
63 AGND GND Analog Ground. Analog ground is tied common with DGND on the SocketModem.
To minimize potential ground noise issues, connect audio circuit return to AGND.
64 SPKR O Speaker. Dual purpose output for call progress signals or speakerphone functions.
Call Progress signaling on MT5600SMI, MT5656SMI, and MT2492SMI is a square
wave output that can be optionally connected to a low-cost single-ended speaker;
e.g., a sounducer or an analog speaker circuit.
Call progress on the MT9234SMI is an analog output.
Speakerphone Output on the MT5656SMI is under the control of +FCLASS. This
is a single-ended analog output. SPKR is tied directly to the CODEC. One side of a
differential AC output coupled through a 6.8K ohm resistor and capacitor.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 14
Part 1  Universal Socket Connectivity Chapter 1 – Universal Socket Connectivity

Engineering noise-suppression practices must be adhered to when designing a printed circuit board (PCB)
containing the SocketModem. Suppression of noise is essential to the proper operation and performance of the
modem itself and for surrounding equipment.
Two aspects of noise in an OEM board design containing the SocketModem must be considered: on-board/off-
board generated noise that can affect digital signal processing. Both on-board and off-board generated noise that
is coupled on-board can affect interface signal levels and quality. Of particular concern is noise in frequency
ranges affecting modem performance.
On-board generated electromagnetic interference (EMI) noise that can be radiated or conducted off-board is a
separate, but equally important, concern. This type of noise can affect the operation of surrounding equipment.
Most local government agencies have stringent certification requirements that must be met for use in specific
environments.
Proper PC board layout (component placement, signal routing, trace thickness and geometry, etc.) component
selection (composition, value, and tolerance), interface connections, and shielding are required for the board
design to achieve desired modem performance and to attain EMI certification.
Other aspects of proper noise-suppression engineering practices are beyond the scope of this designer guide.
The designer should consult noise suppression techniques described in technical publications and journals,
electronics and electrical engineering text books, and component supplier application notes.

In a 4-layer design, provide adequate ground plane covering the entire board. In 4-layer designs, power and
ground are typically on the inner layers. All power and ground traces should be 0.05 inches wide.
The recommended hole size for the SocketModem pins is 0.036 in. +/-0.003 in. in diameter. Spacers can be
used to hold the SocketModem vertically in place during the wave solder process.
All creepages and clearances for the SocketModem have been designed to meet requirements of safety
standards EN60950 or EN60601. The requirements are based on a working voltage of 125V or 250V. When the
recommended DAA* circuit interface is implemented in a third party design, all creepage and clearance
requirements must be strictly followed in order to meet safety standards. The third party safety design must be
evaluated by the appropriate national agency per the required specification.
User accessible areas: Based on where the third party design is to be marketed, sold, or used, it may be
necessary to provide an insulating cover over all TNV exposed areas. Consult with the recognized safety agency
to determine the requirements.
Note: Even if the recommended design considerations are followed, there are no guarantees that a particular
system will comply with all the necessary regulatory requirements. It is imperative that specific designs be
completely evaluated by a qualified/recognized agency.
*DAA stands for Data Access Arrangement. DAA is the telephone line interface of the SocketModem.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 15
Part 1  Universal Socket Connectivity Chapter 1 – Universal Socket Connectivity

The following guidelines are offered specifically to help minimize EMI generation. Some of these guidelines are
the same as, or similar to, the general guidelines but are mentioned again to reinforce their importance. In order
to minimize the contribution of the SocketModem-based design to EMI, the designer must understand the major
sources of EMI and how to reduce them to acceptable levels.
1. Keep traces carrying high frequency signals as short as possible.
2. Provide a good ground plane or grid. In some cases, a multilayer board may be required with full layers
for ground and power distribution.
3. Decouple power from ground with decoupling capacitors as close to the SocketModem power pins as
possible.
4. Eliminate ground loops, which are unexpected current return paths to the power source and ground.
5. Decouple the telephone line cables at the telephone line jacks. Typically, use a combination of series
inductors, common mode chokes, and shunt capacitors. Methods to decouple telephone lines are
similar to decoupling power lines; however, telephone line decoupling may be more difficult and
deserves additional attention. A commonly used design aid is to place footprints for these components
and populate as necessary during performance/EMI testing and certification.
6. Decouple the power cord at the power cord interface with decoupling capacitors. Methods to decouple
power lines are similar to decoupling telephone lines.
7. Locate high frequency circuits in a separate area to minimize capacitive coupling to other circuits.
8. Locate cables and connectors so as to avoid coupling from high frequency circuits.
9. Lay out the highest frequency signal traces next to the ground grid.
10. If a multilayer board design is used, make no cuts in the ground or power planes and be sure the
ground plane covers all traces.
11. Minimize the number of through-hole connections on traces carrying high frequency signals.
12. Avoid right angle turns on high frequency traces. Forty-five degree corners are good; however, radius
turns are better.
13. On 2-layer boards with no ground grid, provide a shadow ground trace on the opposite side of the board
to traces carrying high frequency signals. This will be effective as a high frequency ground return if it is
three times the width of the signal traces.
14. Distribute high frequency signals continuously on a single trace rather than several traces radiating from
one point.

All electronic devices should be handled with certain precautions to avoid damage due to the accumulation of
static charge.
See the ANSI/ESD Association Standard (ANSI/ESD S20.20-1999) – a document “for the Development of an
Electrostatic Discharge Control for Protection of Electrical and Electronic Parts, Assemblies and Equipment.”
This document covers ESD Control Program Administrative Requirements, ESD Training, ESD Control Program
Plan Technical Requirements (grounding/bonding systems, personnel grooming, protected areas, packaging,
marking, equipment, and handling), and Sensitivity Testing.
Multi-Tech Systems, Inc. strives to follow all of these recommendations. Input protection circuitry has been
incorporated into the Multi-Tech devices to minimize the effect of this static buildup, proper precautions should
be taken to avoid exposure to electrostatic discharge during handling.
Multi-Tech uses and recommends that others use anti-static boxes that create a faraday cage (packaging
designed to exclude electromagnetic fields). Multi-Tech recommends that you use our packaging when returning
a product and when you ship your products to your customers.

Use extreme caution when the phone line is installed due to live energized components. In fact, do not touch any
components on the board while the phone line is installed.
In addition, the phone line should be detached when making modifications to or servicing the developer board.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 16
Part 1  Universal Socket Connectivity Chapter 1 – Universal Socket Connectivity

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 17
Part 1  Universal Socket Connectivity Chapter 1 – Universal Socket Connectivity

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 18
Part 1  Universal Socket Connectivity Chapter 1 – Universal Socket Connectivity

This is a companion table for the mechanical drawings on the two previous pages.
Product Maximum Maximum Length Width
Component Component
Height on the Height on the
Top Side of the Bottom Side of
Board the Board
Embedded Wireless Modems

SocketModem GPRS – MTSMC-G2 .154" (3.900 mm) .126" (3.200 mm) 3.150" (80.010 mm) 1.375" (34.925 mm)
SocketModem EDGE – MTSMC-E .253" (6.426 mm) .126" (3.200 mm) 2.54" (64.541 mm) 1.375" (34.925 mm)
SocketModem HSDPA – MTSMC-H .260" (6.604 mm) .126" (3.200 mm) 3.150" (80.010 mm) 1.375" (34.925 mm)
Embedded Analog SocketModems

SocketModem – MT9234SMI .290" (7.366 mm) .115" (2.921 mm) 2.54" (64.541 mm) 1.045" (26.543 mm)
SocketModem – MT5600SMI .115" (2.921 mm) .115" (2.921 mm) 2.54" (64.541 mm) 1.045" (26.543 mm)
SocketModem – MT5656SMI .213" (5.410 mm) .115" (2.921 mm) 2.54" (64.541 mm) 1.045" (26.543 mm)
SocketModem – MT5656SMI-IP .213" (5.410 mm) .115" (2.921 mm) 2.54" (64.541 mm) 1.045" (26.543 mm)
SocketModem – MT2492SMI .177" (4.495 mm) NA 2.54" (64.541 mm) 1.045" (26.543 mm)
SocketModem IP – MT2456SMI-IP .228" (5.791 mm) .114" (2.895 mm) 2.54" (64.541 mm) 1.045" (26.543 mm)
Embedded Device Servers

SocketEthernet IP – MT100SEM-IP .341" (8.661 mm) .115" (2.921 mm) 2.54" (64.541 mm) 1.045" (26.543 mm)
SocketModem Wi-Fi – MT800SWM .202" (5.130 mm) NA 2.54" (64.541) mm) 1.045" (26.543 mm)
SocketWireless Bluetooth – MTS2BTSMI .089" (2.260 mm) NA 2.54" (64.541) mm) 1.045" (26.543 mm)

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 19
Part 1  Universal Socket Connectivity Chapter 1 – Universal Socket Connectivity

This developer board drawing shows the major board components for all SocketModems.

Board Revision B
See the next page for description of Board Components

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 20
Part 1  Universal Socket Connectivity Chapter 1 – Universal Socket Connectivity

Jumper Description
JP1 Mutes the speaker. Default positions are 1 and 2 (speaker is not muted).
JP2 Ties the TX and RX clock lines together. Default positions are 1 and 2 (transmit and receive
clock act independently).
JP3 Sets the data rate. NORMAL sets the data rate at 250kbps.
H.S. (high speed serial communications) sets the data rate at 1Mbps.
JP4 Testing interface (debugging) for the RS-232 signals.
JP5 JP5 acts as a replacement for pin 45 when pin 45 is used for another function.
JP7 Testing interface (debugging) for the serial TTL signals.
JP9 JP9 is the 5V / 3.3V regulator. The factory default operating voltage is 3.3V.
Warning – Be sure that the 5V / 3.3V jumper is set to match the requirements of your
SocketModem. If this jumper is set incorrectly, damage to the SocketModem and/or the
Test/Demo card could result.
Caution – Use only the provided Multi-Tech Systems, Inc. transformer with the Test/Demo
board. Use of any other power source will void the warranty and will likely damage the
Test/Demo board and the SocketModem. The transformer connector is keyed to prevent
improper connection to the Test/Demo board.
JP12 JP12 allows you to select either the internal 5V regulator (INT 5V) or to choose EXT 5V. For
the EXT 5V, you can use your own external 5V power source and plug it into J7.
JP13 Set either 5V or 3.3V for USB_VBUS line (supplied by the VCC of the USB jack).
JP14 Internal testing.
JP15 JP15 disconnects pin 45 from SLP with JP5 (the RS-232 driver sleep mode).
JP16 JTAG header.
JP17 Mosquito header. If used to debug the SocketModem while using the USB port, then the JP14
would have to be removed to disconnect USB_VBUS.
JP18 Power feed for area where SocketModems are placed (J24).
JP19 & JP20 Debugging probes.
JP25 & JP26 Ground lug.
S4 Set the switch block to the product being used.
S5 Reset

J4 and J7
10 PWR 9 RI
8 CTS 7 RTS
6 DSR 5 GND
4 DTR 3 TXD
2 RXD 1 DCD

J2 and J13
2 RXC 1 TXC

JP10 JP11
TX Term RX Term

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 21
Part 1  Universal Socket Connectivity Chapter 1 – Universal Socket Connectivity

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 22
Part 1  Universal Socket Connectivity Chapter 1 – Universal Socket Connectivity

Board Revision B

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 23
Part 1  Universal Socket Connectivity Chapter 1 – Universal Socket Connectivity

Board Revision B

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 24
Part 1  Universal Socket Connectivity Chapter 1 – Universal Socket Connectivity

Board Revision B

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 25
Part 1  Universal Socket Connectivity Chapter 1 – Universal Socket Connectivity

Board Revision B

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 26
Part 1  Universal Socket Connectivity Chapter 1 – Universal Socket Connectivity

Board Revision B

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 27
Part 1  Universal Socket Connectivity Chapter 1 – Universal Socket Connectivity

Your modem is controlled by semi-permanent firmware, which is stored in flash memory. Multi-Tech's firmware is nonvolatile;
that is, it remains stored in memory when the modem is turned off and can be upgraded as new features are added.
Multi-Tech's Flash Wizard can be downloaded from Multi-Tech’s FTP site and is available on CD. Use this Flash Wizard for
upgrading your firmware. Documentation for using the Flash Wizard is included with the wizard.
The following table shows you which products support the Flash Wizard.

Wireless SocketModems
SocketModem GPRS MTSMC-G2 Do not use the Flash Wizard for the wireless modems. Contact
Multi-Tech for wireless modem firmware upgrade directions.
SocketModem CDMA MTSMC-C Do not use the Flash Wizard for the wireless modems. Contact
Multi-Tech for wireless modem firmware upgrade directions.
SocketModem EDGE MTSMC-E Do not use the Flash Wizard for the wireless modems. Contact
Multi-Tech for wireless modem firmware upgrade directions.
SocketWireless HSDPA Do not use the Flash Wizard for the wireless modems. Contact
Multi-Tech for wireless modem firmware upgrade directions.
Analog SocketModems
SocketModem MT9234SMI Flash Wizard Software for Windows, Mac OSX, Linux
Multi-Tech Flash Protocol
SocketModem MT5600SMI & Flash Wizard Software for Windows, Mac OSX, Linux
MT5656SMI Can use ASCII upload via terminal emulator.
SocketModem IP MT5656SMI-IP Flash Wizard Software for Windows, Mac OSX, Linux
Can use ASCII upload via terminal emulator.
SocketModem MT2492SMI No Flash Upgrade.
Embedded Device Servers
SocketEthernet IP MT100SEM-IP Flash Wizard Software for Windows, Mac OSX, Linux
Can use ASCII upload via terminal emulator.
SocketWireless Wi-Fi MT800SWM XMODEM serial port upgrade. See the next page for information
about using the XMODEM upgrade.
SocketWireless Bluetooth MTS2BTSMI Do not use the Flash Wizard for the wireless modems. Contact
Multi-Tech for wireless modem firmware upgrade directions.

Flash Wizard Software for Windows: ftp://ftp.multitech.com/Utilities/FlashWizard/

Flash Wizard Software for Linux: http://mtflashwiz.sourceforge.net/

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 28
Part 1  Universal Socket Connectivity Chapter 1 – Universal Socket Connectivity

The SocketEthernet IP communications device, for example, contains a 2 MB flash wherein the boot image, the
firmware and configuration files are stored in a compressed format. The flash can easily be upgraded both locally as
well as remotely.

Serial Port Upgrade

The flash of the SocketEthernet IP can be upgraded locally through serial port using the upload feature of serial
applications.

Serial Port Configuration

The default serial port parameters should be:
Data length – 8 bits
Parity – None
Stop bits – 1
Baud-rate of the serial port to which the SocketEthernet IP communications device is connected should be
set to 115200 bps for proper operation.

Example of a Serial Flash Upgrade

Following steps explain the procedure to upgrade a flash using the serial COM port (serial flash upgrade).
Connect the SocketEthernet IP communications device to a PC COM Port.
 Open an application through which we can access the serial device (e.g., Meterm, zoc, hyperterm).
 Reboot the SocketEthernet IP communications device.
 Wait for the boot message and prompt “press d to download” to appear.
 Press d when prompted.
 Select the XMODEM Protocol from the Terminal application.
 Choose a file (MTXCSEM-TFTP-…) file to be uploaded.
 Perform a file upload.
The SocketEthernet IP communications device reboots and will be up after a few seconds (10-15 seconds).

Caution: Refrain from powering off the device during flash upgrade.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 29
Part 1  Universal Socket Connectivity Chapter 1 – Universal Socket Connectivity

This information is provided exclusively for the users of Multi-Tech Systems, Inc. SocketModems, specifically the
MT9234SMI. Multi-Tech Systems, Inc. SocketModem owners have the right to use, modify, and incorporate this code
into other products provided they include the Multi-Tech Systems, Inc. notice and the associated copyright notice with
any such product.
Copyright (C) Multi-Tech Systems, Inc. 1995
All Right Reserved
The flash programming protocol is provided "AS IS” without warranty.
Important: When interacting with the boot code, it is possible to make the modem inoperable.
Use extreme caution.

Programming the Modem

There are two ways to start flash programming a modem. It can be programmed
1. From “AT” mode
2. When the modem powers up.
The following table shows how a modem is programmed.
DTE Modem Comments
AT*FS\r This effectively “restarts” the modem so that it enters the boot code.
Handshake Sequence
M’s Many M’s are sent (10 milliseconds apart) at 19200 baud.
This is where the handshake starts if the modem is just powered up.
U U is sent at 19200 baud if M’s are received within 100 milliseconds of
power up. If the M’s are not received within 100 milliseconds, then
the modem starts up normally. If the AT*FS command is used, then
you have 1 second (1000mS) to perform the handshake.
D Sent at 19200 baud.
M M if can receive at 9600/19200/38400/57600/115200
I|J|K|L|M I if modem will be programmed at 9600
J if modem will be programmed at 19200
K if modem will be programmed at 38400
L if modem will be programmed at 57600
M if modem will be programmed at 115200
\r\nOK\r\n Modem is ready to be programmed
Program Sequence:
DTE Modem Comments
ATFLP\r Request to the modem to program
G Modem is ready for next program packet
[Length High byte of data packet length
High]
[Length Low] Low byte of data packet length
Packet lengths can be up to 4096 bytes in size for most boot code
versions
[Address High byte of program address
High]
[Address Middle byte of program address
Middle]
[Address Low byte of program address
Low] Addresses are 3 byte values with a range of 00000h-FFFFFh
[Data Bytes] These are the data bytes to be programmed at the address specified
above. They must be the same number of bytes as specified above.
[Checksum] This checksum is generated by exclusive ORing together all of the
Data Bytes (do not include the Length or Address bytes in that
calculation).
\nOK\r\n If bytes are programmed and verified.
\nERROR\r\n If verify fails or checksum is bad.
Retry the block 3 times on an ERROR.
More of the above sequence until all the data bytes have been sent
…. …. to the modem.
ATFLEND\r This ends programming and restarts the modem.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 30
Part 1  Universal Socket Connectivity Chapter 1 – Universal Socket Connectivity

Other Supported Boot Code Commands

2.1 ATI0 - returns 000 or 247 for ISDN
2.2 ATI1 - returns boot code version number MM.mmn where
MM = unique code for each different platform that has boot code
mm = version number of boot code
n = version letter of the boot code
Examples: 2.05e, 2.12d, 35.15
ATI4- Boot code date and time.

Other Programming Concerns

1. The packets sent to the modem must be presorted by address and aligned on 128 byte boundaries (i.e., each
packet must start on an address that is a multiple of 128).
2. The packets should also be a minimum of 128 bytes with the non-programmed bytes set to the hex value of FF.
3. The packets sent to the modem must not span a 4K boundary (i.e., start the packet before it and go over the
boundary in the middle of the packet).
4. The 10-millisecond delay between M’s at the beginning of the handshake is so that the modem can sync up to
the start bit. If the M’s are sent one right after another, a data bit might be mistaken as a start bit.
5. Multi-Tech firmware files are in Intel Hex Format and must be read in and formatted into 128-4096 byte blocks
before being sent to the modem.

Information about the Intel Hex Format

An Intel Format Hex File is a text file consisting of “records”, one per line, that start with a “:” character and include
only digits 0-9 and letters A-F. There are three different record types: Extended Address Records, Data Records, and
End of File Records.
Data records contain the actual data that is to be programmed into a device. The address contained in the data
record needs to be combined with an extended address (by adding the extended address shifted four bits left to the
data record address) to determine the actual programming address for the data. If no extended address record is
before a given data record in the file, then the extended address value is assumed to be zero.
Data Record
Char Pos Field Type Value Description
1 Record Start “:”
2-3 Data Byte Count “NN” Maximum value is FF (which is 255 data bytes).
Typical is 20h which causes the hex record to fit in 80
columns.
4-7 Address “XXXX” Lower 16 bits of 20 bit address, most significant byte
first. This must be added to Extended Address left
shifted four bits.
8-9 Record Type “00” Data Record
10+N Data Bytes “YY..YY The data bytes in hex. Each byte is two characters.
”
NN+1,2 Checksum “ZZ” Zero minus the two’s complement addition of all data
hex values.
NN+3,4 End of Line “\r\n” Carriage Return followed by a Line Feed
Example Data Record in Intel Format
:2000A0005BB66DDBB66CD8B060C183060D1B366DDBB66DDBB76FDFBF7EFDFBF6EDDBB66DD4

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 31
Part 1  Universal Socket Connectivity Chapter 1 – Universal Socket Connectivity

Extended Address Record

Char Field Type Value Description
Pos
1 Record Start “:”
2-3 Data Byte Count “02” Always 2 bytes for this record type
4-7 Address “0000” Not used for this record type (must be zero)
8-9 Record Type “02” Extended Address Record
10-13 Extended Address “EEEE” Top 16 bits of 20 bit address, most significant byte first
14-15 Checksum “ZZ” Zero minus the two’s complement addition of all data hex values
16-17 End of Line “\r\n” Carriage Return followed by a Line Feed
Example Extended Address Record in Intel Format :020000021000EC

End of File Record

Char Field Type Value Description
Pos
1 Record Start “:”
2-3 Data Byte Count “00” Always 2 bytes for this record type
4-7 Address “0000” Transfer Address (usually be zero)
8-9 Record Type “01” End of File Record
10-11 Checksum “ZZ” Zero minus the two’s complement addition of all data hex values
12-13 End of Line “\r\n” Carriage Return followed by a Line Feed
Example End of File in Intel Format :00000001FF

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 32
Part 1  Universal Socket Connectivity Chapter 1 – Universal Socket Connectivity

The antenna system for use with Multi-Tech modems built into your products must include a coax cable to interface
between UFL or MMCX connection on the modem and the antenna itself.

GSM/EGSM RF Specifications
GSM 850 EGSM 900 GSM 1800 GSM 1900
Frequency RX 869 to 894 MHz 925 to 960 MHz 1805 to 1880 MHz 1930 to 1990 MHz
Frequency TX 824 to 849 MHz 880 to 915 MHz 1710 to 1785 MHz 1850 to 1910 MHz
RF Power Stand 2W at 12.5% duty cycle 2W at 12.5% duty cycle 1W at 12.5% duty cycle 1W at 12.5% duty cycle

CDMA RF Specifications
CDMA 800 CDMA 1900
Frequency RX 869 to 894 MHz 1930 to 1990 MHz
Frequency TX 824 to 849 MHz 1850 to 1910 MHz

GSM Antenna Requirements/Specifications

Frequency Range 824 – 960 MHz / 1710 – 1990 MHz
Impedance 50 Ohms
VSWR VSWR shall not exceed 2.0:1 at any point across the bands of operation
Typical Radiated Gain 0 dBi on azimuth plane
Radiation Omni-directional
Polarization Vertical
Wave Half Wave Dipole
Cable Loss The cable loss shall be such that the total radiate power (TRP) at the antenna shall
be no less than +22/24.5 dBm for 850/1900 MHz respectively, and the total isotropic
sensitivity (TIS) at the antenna shall be no less than -99/101.5 dBm for 850/1900
MHz respectively.

GPS (Global Positioning) Antenna Requirements/Specifications

Frequency 1575MHz
Impedance 50 Ohms
VSWR 2.0db
Input voltage 3.0V +/- 0.3V
Connection SMA

Quad Band Description Qty Part Number

Hinged Right Angle 800/900/1800/1900 MHz Cellular Modem Antenna 1 ANQB-1HRA
Hinged Right Angle 800/900/1800/1900 MHz Cellular Modem Antenna 10 ANQB-10HRA
Hinged Right Angle 800/900/1800/1900 MHz Cellular Modem Antenna 50 ANQB-50HRA
Dual Band Description Qty Part Number
Hinged Right Angle 900/1800 MHz Cellular Modem Antenna 1 ANF1-1HRA
Hinged Right Angle 900/1800 MHz Cellular Modem Antenna 10 ANF1-10HRA
Hinged Right Angle 900/1800 MHz Cellular Modem Antenna 50 ANF1-50HRA
Hinged Right Angle 800/1900 MHz Cellular Modem Antenna 1 ANCF2-1HRA
Hinged Right Angle 800/1900 MHz Cellular Modem Antenna 10 ANCF2-10HRA
Hinged Right Angle 800/1900 MHz Cellular Modem Antenna 50 ANCF2-50HRA
Bluetooth and Wi-Fi Qty Part Number
Hinged 2.4 MHz Bluetooth / Wi-Fi Antenna 1 ANBT-1
Hinged 2.4 MHz Bluetooth / Wi-Fi Antenna 10 ANBT-10

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 33
Part 1  Universal Socket Connectivity Chapter 1 – Universal Socket Connectivity

This cable shown below is included in the Developer Kit for the CDMA, EDGE SocketModems, and the
SocketWireless Bluetooth.

Cable Specifications
Cable Type: Coax Cable
Attenuation: <1.0db
Connector Impedance: 50 Ohms

An optional antenna cable (SMA to MMCX) can be ordered from Multi-Tech Systems, Inc.
Part Number Description
CASMA-MMCX-1 SMA to MMCX COAX RF 6 inch cable (Single Pack)
CASMA-MMCX-10 SMA to MMCX COAX RF 6 inch cable (Ten Pack)

MMCX-to-SMA Adapter
An antenna with an SMA connector may be directly connected to a SocketModem GPRS/CDMA
through a mating MMCX-to-SMA adapter.
SMA-to-MMCX Connector Available from Amphenol
Amphenol
http://www.amphenol.com/
Order No: 908-31100

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 34
Part 1  Universal Socket Connectivity Chapter 1 – Universal Socket Connectivity

The UFL-to-SMA cable is included in the Developer Kit for the GPS (Global Positioning), GPRS and HSDPA
SocketModems.

Cable Specifications
Cable Type: Coaxial Cable
Attenuation: <1.0db
Connector Impedance: 50 ohm

An optional antenna cables can be ordered from Multi-Tech Systems, Inc.

Part Number Description
CASMA8-UFL-1 SMA to UFL COAX RF 8 inch cable (Single Pack)
CASMA8-UFL-10 SMA to UFL COAX RF 8 inch cable (Ten Pack)
CARSMA8-UFL-1 RSMA to UFL COAX RF 8 inch cable (Single Pack)
CARSMA8-UFL-10 RSMA to UFL COAX RF 8 inch cable (Ten Pack)

There cannot be any alteration to the authorized antenna system. The antenna system must be the same
type with similar in-band and out-of-band radiation patterns and maintain the same specifications.

The antenna gain, including cable loss, must not exceed 3.0 dBi at 1900 MHz / 1.6 dBi at 850 MHz for
mobile operating and fixed mounted operations, as defined in 2.1091 and 1.1307 of the rules for satisfying
RF exposure compliance.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 35
Part 1  Universal Socket Connectivity Chapter 1 – Universal Socket Connectivity

Pre-Configured Multi-Tech Products

Some Multi-Tech wireless modems have been pre-configured to operate on a
specific wireless network, such as Sprint and Verizon.
However, before you can begin to use the modem, you must set up a wireless data account with your wireless
network provider. Then, follow the activation procedures covered on the Activation Notices available from Multi-Tech.

Approvals and Certification

The Multi-Tech SocketModem is Industry and/or Carrier Approved as an End Product modem. In most cases, when
integrated and used with an antenna system that was part of the Multi-Tech modem certification, no additional
approvals or certification is required (however, CDMA has a few exceptions) for the device you develop as long as
the following are met:

 PTCRB Requirements:
The antenna system cannot be altered.

 Model Identification:
IMPORTANT
When the wireless carrier asks you to provide the modem's model identification,
give the Multi-Tech wireless model identification, not the identification of the host device model.
See the label example below.

The Multi-Tech model identification allows the carrier to verify the modem as one of its approved models.
This information is located on the modem's label.

The Following Is an Example of an End Product GPRS Label:

Host Device Model
Identification

Multi-Tech
SocketModem Model
Identification

IMEI
(International Mobile
Equipment Identity)

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 36
Part 1  Universal Socket Connectivity Chapter 1 – Universal Socket Connectivity

The Following Is an Example of a CDMA Label:

Multi-Tech Model Identification

Multi-Tech Ordering Part Number

ESN:
Electronic Serial Number in
Hexadecimal Format

and Decimal Format

 Other Information the Wireless Carrier Asks You to Provide:

For CDMA SocketModems: The modem's 8-character ESN (Electronic Serial Number) number printed next
to the barcode on the modem. The ESN may vary in format by various CDMA carriers; some use a decimal
number while others use a hexadecimal number.
For GSM SocketModems: The modem's 15-character IMEI (International Mobile Equipment Identity)
number printed on the modem's label.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 37
Part 1  Universal Socket Connectivity Chapter 1 – Universal Socket Connectivity

Disclaimer: Multi-Tech Systems makes no warranty claims for vendor product recommendations listed below. Other
vendor products may or may not operate satisfactorily. Multi-Tech System’s recommended vendor products only indicate
that the product has been tested in controlled conditions and were found to perform satisfactorily.
Surface mount ferrites are used on T&R (Tip and Ring) to mitigate emission levels out the RJ-11 cable. 220pF capacitors
are also used on T&R to reduce the common mode emissions that may be present in certain systems. See the Tip and
Ring drawings in each analog SocketModem chapter.
The ferrite and capacitors also aid in reducing the effects of transients that may be present on the line.
Note: These parts are RoHS compliant.

Recommended Ferrite (SMT)

Manufacturer – Associated Component Technology (ACT) Part # CBZ1206-202-30-LF
Manufacturer – Murata Erie Part # BLM31AJ601SN1L
Recommended Ferrite (Thru-Hole)
Manufacturer – Associated Component Technology (ACT) Part # WB2-2.OT

Recommended Capacitor (SMT)

Manufacturer – NOVACAP Part # ES2211N221K502NXT
Manufacturer – Murata Erie Part # GA355DR7GC221KY02L
Recommended Capacitor (Thru-Hole)
Manufacturer – Ever Grace Electronic Industrials Part # YP221K2EA7PS-8.0
Manufacturer – Murata Erie Part # DE2B3KH221KA3B
Note: Capacitors used on T&R must have the Y2 safety rating.

Recommended RJ-11 Connector

Manufacturer – Full Rise Electronic Co. Part # E5964-00P045

Recommended Sidactor
Manufacturer – RayChem / Tyco Electronics Part # TVB400MSC-L
Manufacturer – ST Microelectronics Part# SMPMC-400

Recommended Poly Switch Thermal Fuse (SMT)

Manufacturer – RayChem / Tyco Electronics Part # TS600-170F
Recommended Poly Switch Thermal Fuse (Thru-Hole)
Manufacturer – RayChem (Tyco Electronics) Part# TRF600-150
Note: The Fuse & Sidactor are required in order to comply with UL60950 for protection against over-voltages from power
line cross. Fuse can be reset type.

Common Mode Choke

Manufacturer – TDK Part # ZJYS51R5-2PT-01

Recommended Transceiver
Manufacturer – Analog Devices Part # ADM207EARZ

SIP Connector
Manufacturer – Neltron Industrial Co. (http://www.neltron.com.tw/) Part #2209S-xxSG
4-Pin 2.0mm SIP Socket (2 Each)
10-Pin 2.0mm SIP Socket (2 Each)

Telecom
The RJ-11 connector must meet FCC Part 68 requirements. Refer to FCC Part 68 section 68.500 subpart F for connector
specifications. A self-healing fuse is used in series with line to help prevent damage to the DAA circuit. This fuse is
required in order to meet compliance regulations.
Note: See Application Notes at the end of each SocketModem chapter.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 38
Part 1  Universal Socket Connectivity Chapter 1 – Universal Socket Connectivity

United States Labeling Requirements (for Dial-Up Modems)

Telecom does not apply to all products. For example, this is not applicable for the SocketModem GPRS and
CDMA products.
Approved terminal equipment and approved protective circuitry shall prominently display the following
information using the format shown below:
 Responsible party
 Product Identification
 Equipment Code
 Ringer Equivalence
 Ringer Type
 Indication that the product meets the requirements of FCC Part 68
The information required by the first five items shall correspond to the records in the ACTA (America's Carriers
Telecommunications Association) database of approved equipment. The required information shall be encoded
in the following format:
US: AAAEQ##TXXX
Where:
US: Is a fixed field that indicates the equipment meets all requirements of 47 CFR Part 68, including the
requirements published by ACTA (America's Carriers Telecommunications Association).
AAA is the responsible party’s Grantee Code obtained previously from the FCC’s Common Carrier Bureau or
currently from ACTA.
EQ Is an Equipment Code indicating to the Service Provider any special signal handling or billing requirements.
The Equipment codes are listed in Annex A (normative).
## is the Ringer Equivalence Number without a decimal point (e.g. REN of 1.0 = 10, REN of 0.3 = 03). In the
case of a “Z” ringer, ZZ shall appear. In the case of approved equipment without a network interface and
equipment not connecting to circuits with analog ringing supplied then “NA” shall appear.
T is the ringer type letter associated with the Ringer Equivalence Number, in accordance with the technical
requirements. In the case of approved equipment without a network interface and equipment not connecting to
circuits with analog ringing supplied, the letter “N” shall appear.
XXX Is a product identifier, unique when combined with the responsible party’s Grantee Code, of at least one
and up to nine alphanumeric characters (including one or more dashes (-) if desired. A dash shall not appear as
the first or last character nor shall the identifier consist entirely of dashes). The responsible party shall define this
identifier.

Label Physical Characteristics

The information required above shall be permanently affixed and legible without magnification. It may be
etched, engraved, stamped, indelibly printed, or otherwise permanently marked. Alternatively, the required
information may be permanently marked on a nameplate of metal, plastic or other material fastened to the
enclosure by welding, riveting or with a permanent adhesive. Such a nameplate shall be able to last for the
expected lifetime of the equipment and shall not be readily detachable.

Labeling Continuity and Changes

The labeling content and format requirements in effect when a product was approved shall be effective for
the life of the product. The labeling content and format requirements in effect at approval shall also continue
to be effective for modified products. However, the responsible party shall have the option of conforming a
product's labeling to current content and format requirements at any time.

Other Label Requirements

The label shall be placed in one of the following locations in a location where it can be found after
installation:
 on an outside surface
 inside a readily available access door or panel
 on another readily accessible surface
For example, the label should not be placed on the rear of a permanently wall-mounted device in a manner
such that it is not readily accessible.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 39
Part 1  Universal Socket Connectivity Chapter 1 – Universal Socket Connectivity

Canadian Labeling Requirements (for Dial-Up Modems)

The following requirements are established under section 69.3 of the Telecommunications Act for purposes of
section 5 of the Telecommunications Apparatus Regulations.
Registered equipment shall bear the following identifying marks, and the Declaring Party shall ensure that these
marks are permanently affixed to the equipment:
(a) The registration number — Specifications of this mark are given in the document: Self-Marking of the
Certification/Registration Number on Terminal Equipment — Application Procedure and Agreement; and
(b) The model identification number under which the product was registered.
A statement of compliance with Industry Canada requirements, such as the one given below, shall accompany
each unit of equipment whether registered under this procedure or previously certified:
"This product meets the applicable Industry Canada technical specifications"
For terminal equipment intended for connection to loop-start or ground-start interfaces, the Ringer Equivalence
Number (REN) must be calculated as per Section 1.8 of CS-03, Part I. A REN higher than that determined may
be assigned by manufacturers to allow for production variations. The REN must be marked on the terminal
equipment itself or added to the note below. A note similar to the following shall accompany each unit of
equipment whether registered under this procedure or previously certified:
"The Ringer Equivalence Number is an indication of the maximum number of devices allowed to be
connected to a telephone interface. The termination on an interface may consist of any combination of
devices subject only to the requirement that the sum of the RENs of all the devices does not exceed
five".
Pursuant to section 69.3 of the Telecommunications Act, certified or self-declared TE will bear a valid identifying
certification number or registration number. The marking of the certification or registration number on the product
shall be as follows:
(a) TAC holder/DP will be responsible for permanently affixing the certification/registration number on the TE.
The certification/registration number (see example below) identifies Certified or self-declared TE to the
public, representatives of the telecommunications common carriers, the Department, and other interested
parties. The letter height must be no less than 1.5 mm and the letters must be legible without magnification.
(b) For integrated devices, e.g. a modem or one that is intended to become a sub-assembly of host equipment
e.g. a data terminal, computer etc. that are designed to interface directly with the network, the
certification/registration number shall be affixed to the integrated device itself.
(c) The certification/registration number for a packaged TE will denote that the total package has been
registered. However, the marking will normally be placed on that unit of the package which connects to the
network; e.g., in a PBX the marking will be placed on the common equipment which connects to the
network, rather than on plug-in components which may be added later. The Terminal Equipment List will
show the common equipment but not the standard station apparatus or any proprietary station apparatus.
(d) The marking format of the certification/registration number is as follows:
IC: XXXXXX-YYYYYYYY
Where:
 The letters "IC" have no other meaning or purpose than to identify the Industry Canada
certification/registration number, and
 “XXXXXX-YYYYYYYY” is the certification/registration number; “XXXXXX” is the Company Number¹ (CN);
it consists of up to six alphanumeric characters (A-Z, 0-9) assigned by Industry Canada; and
“YYYYYYYY” is the Unique Product Number (UPN); it consists of up to eight alphanumeric characters (A-
Z, 0-9) assigned by the applicant. Other characters, (such as & # *-) may not be used. Alphabetic
characters must be capitalized.
¹ Note: The Company Number of registered equipment ends with an alphabetic character.
(e) Certification Numbers granted prior to the implementation of the above marking format are grandfathered.
(i) For previously certified TE, the self-marking format shall consist of the old certification number preceded
by “IC:” For example, if the certification number is “123 1234 A”, then the self-mark would read “IC: 123
1234 A”.
(ii) For a new model that is registered to a family of previously certified TE, the self-marking format shall be:
IC: XXXXXX-ZZZZZZZZ
Where:
 “XXXXXX” is the Company Number, as in (d) above; and
 “ZZZZZZZZ” is either the old certification number minus the old company number, or a new Unique
Product Number assigned by the applicant. For example, if a new model is registered to the family of
products with certification number “123 1234 A”, and that the Company Number for the registration is
“123A”, then the self-mark for this new model would read “IC: 123A-1234 A”. If the applicant decides to
replace “1234 A” with a new UPN, say “5678", then the self-mark would read “IC: 123A-5678".

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 40
Part 1  Universal Socket Connectivity Chapter 1 – Universal Socket Connectivity

Label Examples for Analog SocketModems

Note: These do not apply to the Wireless GPRS and CDMA products.

Serial Label
This label shows the
modem model (M/N),
build option (B/O),
date of manufacture
(DOM), serial number,
and North America
and European Union
regulatory information.

This is an example of
Regulatory Label
which is available from
Multi-Tech by request.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 41
Part 1  Universal Socket Connectivity Chapter 1 – Universal Socket Connectivity

Note to OEMs: The following safety statements may be used in the documentation of your final product
applications.

General Safety
The modem is designed for and intended to be used in fixed and mobile applications. “Fixed” means that the
device is physically secured at one location and is not able to be easily moved to another location. “Mobile”
means that the device is designed to be used in other than fixed locations.

RF Safety
The remote modems are wireless cellular telephones devices. It is important to follow any special
regulations regarding the use of radio equipment due in particular to the possibility of Radio Frequency (RF)
interference.
Caution: A separation distance of at least 20 cm must be maintained between the modem transmitter’s
antenna and the body of the user or nearby persons. The modem is not designed for or intended to be used
in portable applications within 20 cm of the body of the user. In particular, if using a Yagi antenna, it must be
in a location that prevents public exposure to the radiation limits being exceeded. Check your local
standards regarding safe distances, etc.
 Wireless modems in an ATM in, for example, a hospital environment and any other place where medical
equipment may be in use, may be a hazard. This statement also applies to inadequately protected
personal medical devices such as hearing aids and pacemakers.
 Operation of a wireless modem close to other electronic equipment may also cause interference if the
equipment is inadequately protected. Observe any warning signs and manufacturers’ recommendations.
 The modems must not be operated around gasoline or diesel-fuel.

RF Interference Safety
It is important to follow any special regulations regarding the use of radio equipment due in particular to the
possibility of radio frequency, RF, interference. Please follow the safety advice given below carefully.
 Switch OFF your Wireless MultiModem when in an aircraft. The use of cellular telephones in an aircraft
may endanger the operation of the aircraft, disrupt the cellular network and is illegal. Failure to observe
this instruction may lead to suspension or denial of cellular telephone services to the offender, or legal
action or both.
 Switch OFF your Wireless MultiModem when around gasoline or diesel-fuel pumps and before filling your
vehicle with fuel.
Switch OFF your wireless device in hospitals and any other place where medical equipment may be in use.
 Respect restrictions on the use of radio equipment in fuel depots, chemical plants or where blasting
operations are in progress.
 There may be a hazard associated with the operation of your wireless device close to inadequately
protected personal medical devices such as hearing aids and pacemakers. Consult the manufacturers of
the medical device to determine if it is adequately protected.
 Operation of your wireless device close to other electronic equipment may also cause interference if the
equipment is inadequately protected. Observe any warning signs and manufacturers’ recommendations.

Vehicle Safety
 Do not use your wireless device while driving.
 Respect national regulations on the use of cellular telephones in vehicles. Road safety always comes first.
 If incorrectly installed in a vehicle, the operation of a wireless telephone could interfere with the correct
functioning of vehicle electronics. To avoid such problems, be sure that qualified personnel have
performed the installation. Verification of the protection of vehicle electronics should be part of the
installation.
 The use of an alert device to operate a vehicle’s lights or horn on public roads is not permitted.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 42
Part 1  Universal Socket Connectivity Chapter 1 – Universal Socket Connectivity

Maintenance of Your Wireless Device

Your wireless device is the product of advanced engineering, design, and craftsmanship and should be
treated with care. The suggestions below will help you to enjoy this product for many years.
 Do not expose the wireless device to any extreme environment where the temperature is above 50ºC or
humidity is above 90% noncondensing.
 Do not attempt to disassemble the wireless device. There are no user serviceable parts inside.
 Do not expose the wireless device to water, rain, or spilled beverages. It is not waterproof.
 Do not place the wireless device alongside computer discs, credit or travel cards, or other magnetic
media. The phone may affect the information contained on discs or cards.
 The use of accessories not authorized by Multi-Tech or not compliant with Multi-Tech's accessory
specifications may invalidate the warranty of the wireless device.
 In the unlikely event of a fault in the wireless device, contact Multi-Tech Tech Support.

Your Responsibility
This wireless device is your responsibility. Please treat it with care respecting all local regulations. It is not a
toy. Therefore, keep it in a safe place at all times and out of the reach of children.
Try to remember your Unlock and PIN codes. Become familiar with and use the security features to block
unauthorized use and theft.

1. Never install telephone wiring during a lightning storm.

2. Never install a telephone jack in wet locations unless the jack is specifically designed for wet locations.
3. This product is to be used with UL and cUL listed computers.
4. Never touch uninsulated telephone wires or terminals unless the telephone line has been disconnected at
the network interface.
5. Use caution when installing or modifying telephone lines.
6. Avoid using a telephone during an electrical storm. There may be a remote risk of electrical shock from
lightning.
7. Do not use a telephone in the vicinity of a gas leak.
8. To reduce the risk of fire, use only 26 AWG or larger telecommunication line cord.
9. This product must be disconnected from its power source and telephone network interface when servicing.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 43
Part 1  Universal Socket Connectivity Chapter 1 – Universal Socket Connectivity

Multi-Tech's Analog Global* SocketModems are designed and approved for connection to the public switched
telephone network in more than 50 countries or regions worldwide. Multi-Tech's SocketModems have been approved
as host independent, which means our certification efforts can be transferred directly to your end product with proper
labeling on the OEM equipment. Multi-Tech supports our approvals by supplying our customers with supporting
documentation and offering a compliance label with country or regional approval logos and approval numbers to be
attached to an end product.
The following is a list of countries or regions that Multi-Tech completes testing and obtains** certification test reports
or certificates at or near the initial release of the product. After the initial release, the product may be tested and
certified for other countries or regions. Check the Multi-Tech Systems, Inc. Web site at
http://www.multitech.com/products/info/approvals/smi.asp or contact Multi-Tech at oemsales@multitech.com to
obtain a current list of approvals for the SocketModem.

Countries or Regions
Argentina France Liechtenstein Singapore
Australia Germany Lithuania Slovakia Republic
Austria Greece Luxembourg Slovenia
Belgium Hong Kong, S.A.R. of China Malta South Africa
Bulgaria Hungary Mexico Spain
Canada Iceland Netherlands Sweden
Chile Indonesia New Zealand Switzerland
China Ireland Norway Taiwan
Cyprus Israel Philippines Thailand
Czech Republic Italy Poland Turkey
Denmark Japan Portugal United Kingdom
Estonia Korea Romania United States
Finland Latvia Russia

The above list is our target set of countries or regions in which the global* SocketModems are approved. Many of
the approvals are completed at the time the product is released to market; whereas, others may take additional
months to complete the approval.

* Refer to each chapter for Product Ordering Information identifying the modem as Global or Regional.

** Some countries or regions have special import requirements that require us to facilitate additional paperwork
application in partner with our customers. Contact Technical Support or Multi-Tech at
oemsales@multitech.com for more information.

Note:
Setting Country/Regional Codes – Country or Regional Codes are usually set through AT Commands.
See each product’s AT Command guide.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 44
Part 1  Universal Socket Connectivity Chapter 1 – Universal Socket Connectivity

EMC, Safety, and R&TTE Directive Compliance

The CE mark is affixed to this product to confirm compliance with the following European Community Directives:
Council Directive 2004/108/EC of 15 December 2004 on the approximation of the laws of Member States
relating to electromagnetic compatibility;
and
Council Directive 2006/95/EC of 12 December 2006 on the harmonization of the laws of Member States
relating to electrical equipment designed for use within certain voltage limits;
and
Council Directive 1999/5/EC of 9 March 1999 on radio equipment and telecommunications terminal
equipment and the mutual recognition of their conformity.

International Modem Restrictions

Some dialing and answering defaults and restrictions may vary for international modems. Changing settings may
cause a modem to become non-compliant with national telecom requirements in specific countries. Also note
that some software packages may have features or lack restrictions that may cause the modem to become non-
compliant.

EMC Requirements for the United States

47 CFR – FCC Part 15 Regulation
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to
47 CFR – FCC Part 15 regulations. The stated limits in this regulation are designed to provide reasonable
protection against harmful interference in a residential environment. This equipment generates, uses, and can
radiate radio frequency energy, and if not installed and used in accordance with the instructions, may cause
harmful interference to radio communications. However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to radio or television reception, which
can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference
by one or more of the following measures:
 Reorient or relocate the receiving antenna.
 Increase the separation between the equipment and receiver.
 Plug the equipment into an outlet on a circuit different from that to which the receiver is connected.
 Consult the dealer or an experienced radio/TV technician for help.

This device complies with 47 CFR – FCC Part 15 rules. Operation of this device is subject to the following
conditions:
(1) This device may not cause harmful interference, and
(2) This device must accept any interference that may cause undesired operation.

Warning: Changes or modifications to this unit not expressly approved by the party responsible for compliance
could void the user’s authority to operate the equipment.

EMC Requirements for Industry Canada

This Class B digital apparatus meets all requirements of the Canadian Interference-Causing Equipment
Regulations.
Cet appareil numérique de la classe B respecte toutes les exigences du Reglement Canadien sur le matériel
brouilleur.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 45
Part 1  Universal Socket Connectivity Chapter 1 – Universal Socket Connectivity

47 CFR Part 68 Telecom

1. This equipment complies with Part 68 of the 47 CFR rules and the requirements adopted by the ACTA.
Located on this equipment is a label that contains, among other information, the registration number
and ringer equivalence number (REN) for this equipment or a product identifier in the format:
For current products is US:AAAEQ##Txxxx.
For legacy products is AU7USA-xxxxx-xx-x.
If requested, this number must be provided to the telephone company.
2. A plug and jack used to connect this equipment to the premises wiring and telephone network must
comply with the applicable 47 CFR Part 68 rules and requirements adopted by the ACTA. It’s designed
to be connected to a compatible modular jack that is also compliant.
3. The ringer equivalence number (REN) is used to determine the number of devices that may be
connected to a telephone line. Excessive RENs on a telephone line may result in the devices not
ringing in response to an incoming call. In most but not all areas, the sum of RENs should not exceed
five (5.0). To be certain of the number of devices that may be connected to a line, as determined by
the total RENs, contact the local telephone company. For products approved after July 23, 2001, the
REN for this product is part of the product identifier that has the format US:AAAEQ##Txxxx. The digits
represented by ## are the REN without a decimal point (e.g., 03 is a REN of 0.3). For earlier products,
the REN is separately shown on the label.
4. If this equipment causes harm to the telephone network, the telephone company will notify you in
advance that temporary discontinuance of service may be required. But if advance notice isn't
practical, the telephone company will notify the customer as soon as possible. Also, you will be
advised of your right to file a complaint with the FCC if you believe it is necessary.
5. The telephone company may make changes in its facilities, equipment, operations or procedures that
could affect the operation of the equipment. If this happens, the telephone company will provide
advance notice in order for you to make necessary modifications to maintain uninterrupted service.
6. If trouble is experienced with this equipment, please contact Multi-Tech Systems, Inc. at the address
shown below for details of how to have the repairs made. If the equipment is causing harm to the
telephone network, the telephone company may request that you disconnect the equipment until the
problem is resolved.
7. Connection to party line service is subject to state tariffs. Contact the state public utility commission,
public service commission or corporation commission for information.
8. No repairs are to be made by you. Repairs are to be made only by Multi-Tech Systems or its
licensees. Unauthorized repairs void registration and warranty.
9. If your home has specially wired alarm equipment connected to the telephone line, ensure the
installation of this equipment does not disable your alarm equipment.
If you have questions about what will disable alarm equipment, consult your telephone company or a
qualified installer.
10. Connection to party line service is subject to state tariffs. Contact the state public utility commission,
public service commission or corporation commission for information.
11. This equipment is hearing aid compatible.
12. Manufacturing Information on telecommunications device (modem):
Manufacturer: Multi-Tech Systems, Inc.
Trade Name: Socket Modem SocketModem
Model Number: MT9234SMI MT2492SMI
Registration No: US:AU7MM01BMT9234SMI US:AU7MM01B2492SMI
Ringer Equivalence: 0.1B
Modular Jack (USOC): RJ11C or RJ11W (single line)
Service Center in USA: Multi-Tech Systems, Inc.
2205 Woodale Drive
Mounds View, MN 55112 U.S.A.
(763) 785-3500
(763) 785-9874 Fax

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 46
Part 1  Universal Socket Connectivity Chapter 1 – Universal Socket Connectivity

New Zealand Telecom Warning Notice

1. The grant of a Telepermit for any item of terminal equipment indicates only that Telecom has accepted that
the item complies with minimum conditions for connection to its network. It indicates no endorsement of the
product by Telecom, nor does it provide any sort of warranty. Above all, it provides no assurance that any
item will work correctly in all respects with another item of Telepermitted equipment of a different make or
model, nor does it imply that any product is compatible with all of Telecom’s network services.
This equipment is not capable under all operating conditions of correct operating conditions of correct
operation at the higher speed which it is designated. 33.6 kbps and 56 kbps connections are likely to be
restricted to lower bit rates when connected to some PSTN implementations. Telecom will accept no
responsibility should difficulties arise in such circumstances.
2. Immediately disconnect this equipment should it become physically damaged, and arrange for its disposal or
repair.
3. This modem shall not be used in any manner which could constitute a nuisance to other Telecom
customers.
4. This device is equipped with pulse dialing, while the Telecom standard is DTMF tone dialing. There is no
guarantee that Telecom lines will always continue to support pulse dialing.
Use of pulse dialing, when this equipment is connected to the same line as other equipment, may give rise
to 'bell tinkle' or noise and may also cause a false answer condition. Should such problems occur, the user
should NOT contact the Telecom Faults Service.
The preferred method of dialing is to use DTMF tones, as this is faster than pulse (decadic) dialing and is
readily available on almost all New Zealand telephone exchanges.
5. Warning Notice: No '111' or other calls can be made from this device during a mains power failure.
6. This equipment may not provide for the effective hand-over of a call to another device connected to the
same line.
7. Some parameters required for compliance with Telecom’s Telepermit requirements are dependent on the
equipment (PC) associated with this device. The associated equipment shall be set to operate within the
following limits for compliance with Telecom’s Specifications:
For repeat calls to the same number:
 There shall be no more than 10 call attempts to the same number within any 30 minute period for
any single manual call initiation, and
 The equipment shall go on-hook for a period of not less than 30 seconds between the end of one
attempt and the beginning of the next attempt.
For automatic calls to different numbers:
 The equipment shall be set to ensure that automatic calls to different numbers are spaced such
that there is no less than 5 seconds between the end of one call attempt and the beginning of
another.
8. For correct operation, total of the RN’s of all devices connected to a single line at any time should not
exceed 5.

South African Statement

This modem must be used in conjunction with an approved surge protection device.

Thailand Approval for MT9234SMI

This telecom device conforms to NTC* requirements.
*NTC is the National Telecommunications Commission, Thailand’s telecommunications regulator.
“เครื่องโทรคมนาคมและอุปกรณ์นี้ มีความสอดคล้องตามข้อกาหนดของ กทช.”

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 47
Part 1  Universal Socket Connectivity Chapter 1 – Universal Socket Connectivity

Russian Statement
MT5600SMI is Russia approved, Declaration of Conformity # Д-МДФТ-0826 valid through 02/20/2020 (for
MT5600SMI).

Brazil Approval for the MT9234SMI and MT5656SMI

This product has been homologated by ANATEL. This product meets the applied technical requirements in
accordance with the procedures regulated by ANATEL. Reference of homologation of this product can be viewed
in ANATEL web page: http://www.anatel.gov.br

Brazil Bar Code for MT9234SMI

Brazil Bar Code for MT5656SMI

Brazil Certification (MT9234SMI Model Only)

A special phone cable is required for regulatory compliance.
Um cabo especial para telefone é requerido para a conformidade regulatória.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 48
Part 1  Universal Socket Connectivity Chapter 1 – Universal Socket Connectivity

Japan Requirements
These devices conform to (JATE) Japan Approval Institute for Telecommunications Equipment:
MT5692SMI – JATE Approval A09-0123001
MT9234SMI – JATE Approval AD06-0220001

Important Note: SocketModems are approved for product development in Japan only if they are removable
from the manufactured product. The SocketModem must not be soldered into place.

Japan requires that your manufactured product documentation include SocketModem installation and removal
instructions as well as connection to the PSTN network. The following text provides general steps to follow.

Installation of the SocketModem from Your Manufactured Product

1. If applicable, disconnect any power cord and peripherals you may have attached to your manufactured
product.
2. Place the SocketModem on the board of your product. Be sure to match the pins on the SocketModem with
the correct orientation on your board.
3. Be sure that the SocketModem is securely fastened to board so that it cannot come loose while handling or
during shipping. Some examples of fasteners include nylon screws, tie wraps, etc. Remember that you
cannot solder the SocketModem in place.
4. Put the cover on your product and connect the power and peripherals.

Removal of the SocketModem from your Manufactured Product

1. Back up the current configuration of your manufactured product if you want to save it.
2. Record any information not stored in the configuration that you may want to reference.
3. Disconnect any power cord and peripherals from your manufactured product.
4. Remove the cover from your product.
5. To remove the SocketModem, gently lift the SocketModem upwards while holding the board in place.

Connecting to the PSTN Network

For connection to a PSTN network, see the Tip and Ring Interface section in each analog SocketModem
chapter.

Other Countries
The above country-specific examples do not cover all countries with specific regulations; they are included to
show you how each country may differ. If you have trouble determining your own country's requirements, check
with Multi-Tech's Technical Support for assistance.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 49
Part 1  Universal Socket Connectivity Chapter 1 – Universal Socket Connectivity

Note to OEMs: The statement is included for your information and may be used in the
documentation of your final product applications.
WEEE Directive
The WEEE directive places an obligation on EU-based manufacturers, distributors, retailers, and importers to take-
back electronics products at the end of their useful life. A sister Directive, ROHS (Restriction of Hazardous
Substances) complements the WEEE Directive by banning the presence of specific hazardous substances in the
products at the design phase. The WEEE Directive covers all Multi-Tech products imported into the EU as of August
13, 2005. EU-based manufacturers, distributors, retailers and importers are obliged to finance the costs of recovery
from municipal collection points, reuse, and recycling of specified percentages per the WEEE requirements.

Instructions for Disposal of WEEE by Users in the European Union

The symbol shown below is on the product or on its packaging, which indicates that this product must not be
disposed of with other waste. Instead, it is the user’s responsibility to dispose of their waste equipment by handing it
over to a designated collection point for the recycling of waste electrical and electronic equipment. The separate
collection and recycling of your waste equipment at the time of disposal will help to conserve natural resources and
ensure that it is recycled in a manner that protects human health and the environment. For more information about
where you can drop off your waste equipment for recycling, please contact your local city office, your household
waste disposal service or where you purchased the product.

July, 2005

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 50
Part 1  Universal Socket Connectivity Chapter 1 – Universal Socket Connectivity

Multi-Tech Systems, Inc.

Certificate of Compliance
2002/95/EC

Multi-Tech Systems Inc. confirms that its embedded products now comply with the chemical concentration limitations
set forth in the directive 2002/95/EC of the European Parliament (Restriction Of the use of certain Hazardous
Substances in electrical and electronic equipment - RoHS)
These Multi-Tech Systems, Inc. products do not contain the following banned chemicals:
Lead, [Pb] < 1000 PPM
Mercury, [Hg] < 1000 PPM
Hexavalent Chromium, [Cr+6] < 1000 PPM
Cadmium, [Cd] < 100 PPM
Polybrominated Biphenyl, [PBB] < 1000 PPM
Polybrominated Diphenyl Ether, [PBDE] < 1000 PPM

Moisture Sensitivity Level (MSL) =1

Tin Whisker Growth = None detected
Maximum Soldering temperature = 260C (wave only)

Notes:
1. Lead usage in some components is exempted by the following RoHS annex; therefore, higher lead
concentration would be found in some SocketModems (>1000ppm).
a. Lead in high melting temperature type solders (i.e., tin-lead solder alloys containing more than 85%
lead).
b. Lead in electronic ceramic parts (e.g., piezoelectronic devices).
2. Moisture Sensitivity Level (MSL) – Analysis is based on the components/material used on the board.
3. Tin Whisker Study was done per NEMI guidelines (Elevated temperature cycle of 60°C and non-condensing
relative humidity of 87% exposed to this environment for 1000 hours).

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 51
Part 1  Universal Socket Connectivity Chapter 1 – Universal Socket Connectivity

In accordance with China’s Administrative Measures on the Control of Pollution Caused by Electronic
Information Products (EIP) # 39, also known as China RoHS, the following information is provided regarding
the names and concentration levels of Toxic Substances (TS) or Hazardous Substances (HS) which may be
contained in Multi-Tech Systems Inc. products relative to the EIP standards set by China’s Ministry of
Information Industry (MII).

Hazardous/Toxic Substance/Elements

Name of the Lead Mercury Cadmium Hexavalent Polybrominated Polybrominated

Component (PB) (Hg) (CD) Chromium Biphenyl (PBB) Diphenyl Ether
(CR6+) (PBDE)
Printed Circuit Boards O O O O O O
Resistors X O O O O O
Capacitors X O O O O O
Ferrite Beads O O O O O O
Relays/Opticals O O O O O O
ICs O O O O O O
Diodes/ Transistors O O O O O O
Oscillators and Crystals X O O O O O
Regulator O O O O O O
Voltage Sensor O O O O O O
Transformer O O O O O O
Speaker O O O O O O
Connectors O O O O O O
LEDs O O O O O O
Screws, Nuts, and other X O O O O O
Hardware
ac-dc Power Supplies O O O O O O
Software / O O O O O O
Documentation CDs
Booklets and Paperwork O O O O O O
Chassis O O O O O O

X Represents that the concentration of such hazardous/toxic substance in all the

units of homogeneous material of such component is higher than the SJ/Txxx-2006
Requirements for Concentration Limits.
O Represents that no such substances are used or that the concentration is within
the aforementioned limits.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 52
Part 1  Universal Socket Connectivity Chapter 1 – Universal Socket Connectivity

依照中国标准的有毒有害物质信息
根据中华人民共和国信息产业部 (MII) 制定的电子信息产品 (EIP) 标准－中华人民共和国《电子信
息产品污染控制管理办法》（第 39 号），也称作中国 RoHS，下表列出了 Multi-Tech Systems,
Inc. 产品中可能含有的有毒物质 (TS) 或有害物质 (HS) 的名称及含量水平方面的信息。

有害/有毒物质/元素

铅 汞 镉 六价铬 多溴联苯 多溴二苯醚

成分名称 (PB) (Hg) (CD) (CR6+) (PBB) (PBDE)
印刷电路板 O O O O O O
电阻器 X O O O O O
电容器 X O O O O O
铁氧体磁环 O O O O O O
继电器/光学部件 O O O O O O
IC O O O O O O
二极管/晶体管 O O O O O O
振荡器和晶振 X O O O O O
调节器 O O O O O O
电压传感器 O O O O O O
变压器 O O O O O O
扬声器 O O O O O O
连接器 O O O O O O
LED O O O O O O
螺丝、螺母以及其它 X O O O O O
五金件
交流-直流电源 O O O O O O
软件/文档 CD O O O O O O
手册和纸页 O O O O O O
底盘 O O O O O O

X 表示所有使用类似材料的设备中有害/有毒物质的含量水平高于 SJ/Txxx-2006 限量要求。

O 表示不含该物质或者该物质的含量水平在上述限量要求之内。

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 53
 Part 2
Wireless SocketModems

–
–
–
–
PART 2 – Embedded Wireless Modems Chapter 2 – SocketModem Cell and iCell




The MTSMC-G2 is a serial to wireless quad-band GPRS SocketModem. It is a complete, ready-to-integrate SocketModem
that offers standards-based multi-band GSM/GPRS Class 10 performance. It is based on industry-standard open interfaces
and utilizes Multi-Tech’s universal socket design. The SocketModem is available with the Multi-Tech's Universal IP™ stack to
bring embedded Internet connectivity to any device.

Notes about Activation:

 These units are shipped without network activation.
 To connect to the wireless network, you will have to establish a wireless account. See the Wireless Activation
procedures on separate sheets included with the Developer Kit and available on the Developer Kit CD.

Product Description Region Order This

Product

MTSMC-G2 Quad-band GPRS SocketModem Cell US Default
MTSMC-G2-ED Quad-band GPRS SocketModem Cell EU Default
MTSMC-G2-V Quad-band GPRS SocketModem Cell with Voice US Default
MTSMC-G2-V-ED Quad-band GPRS SocketModem Cell with Voice EU Default
MTSMC-G2-IP Quad-band GPRS SocketModem iCell with Universal IP US Default
MTSMC-G2-IP-ED Quad-band GPRS SocketModem iCell with Universal IP EU Default
Developer Kit
MTSMI-UDK Universal Developer Kit Global

How to Read the Product Codes in the Table Above:

G2 GPRS
ED European Default
V Voice (microphone and speaker)
IP Universal IP™ Stack
UDK Universal Developer Kit

Other Product Codes:

The complete product code may end in .Rx. For example, MTSMC-G2.Rx.
“R” indicates product revision. “x” is the revision number.
Note: All products can be ordered in single packs or 50-packs. Single pack product codes end in SP.

Products AT Commands Reference Guide Title & Document Number Fax Commands Voice Commands
SocketModem Cell GPRS AT Commands for Multi-Tech G2 Wireless Modems NA Included
(MTSMC-G2 and (S000463x)
MTSMC-G2-V ) AT Commands for Multi-Tech G2 Wireless Modems with IP
Connectivity (S000469x)
SocketModem iCell GPRS AT Commands for Multi-Tech G2 Wireless Modems NA Included
(MTSMC-G2-IP) (S000463x)
Universal IP Commands (S000457x)

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 55
PART 2 – Embedded Wireless Modems Chapter 2 – SocketModem Cell and iCell

The MTSMC-G2 and MTSMC-G2-IP SocketModems meet the following specifications:

Category Description
Standards GPRS Class 10
Frequency Bands Quad-band GSM/EGPRS 850/900/1800/1900 MHz
Serial/Data Speed Serial interface supports DTE speeds up to 921.6K
IP interface supports DTE speeds at the fixed rate of 115.2
Packet data up to 85.6K bps
Circuit-switched data (GPRS) up to 14.4K bps transparent and non-transparent
Supports data rates of 921600, 460800, 230400, 115200 bps
Data Format 10 bit Serial Asynchronous
Data Error Correction MNP2
Data Compression V.42bis
Weight 1 oz. (28 g)
Size 3.15" x 1.375" (80.010 mm x 34.925 mm)
Operating Temperature -40° C to +85° C
Storage Temperature -40 °C to +85°C
Humidity 10% to 90%
Input Power 5VDC
Operating Voltage Supply Range: VCC
Maximum: 5.5
Voltage at Any Signal Pin Minimum: GND
Maximum: VCC
Antenna Connector Surface mount UFL
SIM Holder Standard 3V SIM holder
IP Protocols Supported MTSMC-G2
DNS Resolve, FTP client, LCP, PPP (dial-out),TCP socket, UDP socket, PAP &
CHAP authentication
MTSMC-G2-IP
DNS Resolve, FTP client, Ping, POP3 client, PPP (dial-out), SMTP, TCP RAW client
& server, UDP RAW client & server, PAP & CHAP authentication
M2M Applications MTSMC-G2-IP
Automatic connect/reconnect, device monitor, modem emulation, Ping & TCP keep
alive, wake-up on caller ID, wake-up on ring
Compliance EMC Compliance
FCC Part 15
EN55022
EN55024
Radio Compliance
FCC Part 22
FCC Part 24
RSS 132
RSS 133
EN 301 511
EN 301 489-1
EN 301 489-7
AS/ACIF S042.1
AS/ACIF S042.3
Safety Compliance
UL 60950-1
cUL 60950-1
EN 60950-1
AS/NZS 60950-1
Network Compliance
PTCRB
GCF
Warranty Two years

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 56
PART 2 – Embedded Wireless Modems Chapter 2 – SocketModem Cell and iCell

Specifications Continued:

Category Description
Features Modes of Operation: Data Mode, Command Mode, and Voice Mode
Embedded TCP/IP stack
Short Message Services (SMS)
RTS/CTS hardware flow control
AT command compatible
Support for HR, FR, EFR, and AMR (Adaptive Multi Rate) voice codec support
Flash upgradeable
Non-volatile memory

Units: Volts
5V DC Characteristics (VDD = 5V ± 0.25V) VDDMAX = 5.25V
Parameter Minimum Maximum
Digital Signal Input Low Level GND 0.8
–DTR (40), –TXD (35), –RTS (33)
Digital Signal Input High Level 2 Vcc
–DTR (40), –TXD (35), –RTS (33)
Digital Signal Output Low Level 0.4
–DCD (39), –CTS (38), –DSR (37), –RI (36), –RXD (34)
Digital Signal Output High Level 3.84
–DCD (39), –CTS (38), –DSR (37), –RI (36), –RXD (34)
Reset (Low Active) Input Low Level 0.8
–Reset (24)
Reset (Low Active) Input High Level 2
–Reset (24)
Digital Input Capacitance 14pF

MTSMC-G2 Measured Power* Measures at Input Voltage 5.00

Sleep Mode Typical Maximum Peak

Current (AMPS) 0.049 0.113 0.24 1.10
Watts 0.245 0.564 1.195

MTSMC-G2-IP Measured Power* Measures at Input Voltage 5.00

Sleep Mode Typical Maximum Peak

Current (AMPS) 0.080 0.135 0.280 1.250
Watts 0.382 0.664 1.358
Note: Current Peak = 1500mA maximum during Tx burst.

MTSMC-G2-GP (for GPS) Measured Power* Measures at Input Voltage 5.00

Input Voltage=5V Sleep Mode Typical Maximum Peak

Current (AMPS) 0.132 0.212 0.355 1.500
Watts 0. 653 1.043 1.732

* Multi-Tech Systems, Inc. recommends that the customer incorporate a 10% buffer into their power source when
determining product load.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 57
PART 2 – Embedded Wireless Modems Chapter 2 – SocketModem Cell and iCell

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 58
PART 2 – Embedded Wireless Modems Chapter 2 – SocketModem Cell and iCell

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 59
PART 2 – Embedded Wireless Modems Chapter 2 – SocketModem Cell and iCell

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 60
PART 2 – Embedded Wireless Modems Chapter 2 – SocketModem Cell and iCell

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 61
PART 2 – Embedded Wireless Modems Chapter 2 – SocketModem Cell and iCell

The flashing LED signal is used to indicate the working mode of the SocketModem.
LEDs and SocketModem Status
Signal SocketModem Status
OFF Download mode or switched OFF>
ON Continuously lit Switched ON (not registered on the network)
Flashing Switched ON (registered on the network)

RF performances are compliant with the ETSI recommendation 05.05 and 11.10.
Note: The following statistics are subject to change due to pending test results.
The main parameters are:
Receiver Features
 EGSM Sensitivity : < -104 dBm
 GSM 1800/GSM 1900 Sensitivity : < -102 dBm
 Selectivity @ 200 kHz : > +9 dBc
 Selectivity @ 400 kHz : > +41 dBc
 Dynamic range : 62 dB
 Intermodulation : > -43 dBm
 Co-channel rejection : + 9 dBc
Transmitter Features
 Maximum output power (EGSM) : 33 dBm ± 2 dB
 Maximum output power (DCS/PCS) : 30 dBm ± 2 dB
 Minimum output power (EGSM): 5 dBm ± 5 dB
 Minimum output power (DCS/PCS): 0 dBm ± 5 dB
 H2 level : < -30 dBm
 H3 level : < -30 dBm
 Noise in 925 - 935 MHz : < -67 dBm
 Noise in 935 - 960 MHz : < -79 dBm
 Noise in 1805 - 1880 MHz : < -71 dBm
 Phase error at peak power : < 5 ° RMS
 Frequency error : ± 0.1 ppm max

The RF connector on the SocketModem GPRS is a UFL standard type. See Chapter 1 for Antenna System details.

The MIC inputs are differential ones. They already include the convenient biasing for an electret microphone (0.5 mA
and 2 Volts). This electret microphone can be directly connected on these inputs. The impedance of the microphone
has to be around 2K. These inputs are the standard ones for a handset design.
The gain of the MIC inputs is internally adjusted. The gain can be tuned from 30dB to 51dB. The connection to the
microphone is direct.
MIC2P

C1 = 22pF to 100 pF C1
33 pF recommended

MIC2N

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 62
PART 2 – Embedded Wireless Modems Chapter 2 – SocketModem Cell and iCell

The SocketModem Cell and the SocketModem iCell both support quad band frequencies (850/1900/900/1800 MHz).
In reality, these products operate like dual, dual-band devices. In other words, they can be configured for 850/1900 or
900/1800 MHz. They do not auto-seek the local area frequency.

Build Options
These wireless modems can be ordered with the default set to 850/1900 MHz or 900/1800 MHz.
 850/1900 MHz – The wireless modem defaulting to 850/1900 MHz is the default build option.
 900/1800 MHz – The wireless modem defaulting to 900/1800 MHz is identified with -ED in the product
ordering number which signifies European default.

Changing the GSM Band

If for any reason, such as moving the modem from one geographical area to another, you want to change the
band, you can accomplish this by using the +WMBS AT Command.

Steps for Changing the GSM Band

Use a terminal application such as HyperTerminal for entering the AT Command.
1. To open HyperTerminal, click Start. Then select Programs > Accessories > Communications. Then
click HyperTerminal.
2. When the command window opens, type AT+WMBS=<Band><Param>. Press Enter.
 For <Band>, enter the option you desire:
4 = Dual-band mode 850/1900MHz
5 = Dual-band mode 900/1800MHz
 For <Param>, enter the option you desire:
0 = Modem must be reset in order to use the specified band(s). This is the default.
1 = Modem restarts immediately using the specified band(s).
Example: AT+WMBS=4,0. Press Enter.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 63
PART 2 – Embedded Wireless Modems Chapter 2 – SocketModem Cell and iCell

Receiver Type L1 Frequency

GPS C/A code
SBAS Capable
51 Channel Acquisitions
14 Channel Tracking
Accuracy Position 2.5m CEP
Velocity 0.1m/sec
Timing 300ns
Open Sky TTFF Hot start 1 second
Cold start 29 seconds average
Reacquisition < 1s
Sensitivity Tracking 161dBm
Update Rate 1Hz standard
Dynamics 4G
Operational Limits Altitude < 18,000m or Velocity < 515m/s
Datum Default WGS-84
Interface UART
Protocol NMEA-0183 V3.01, GGA, GLL, GSA, GSV, RMC, VTG

 Tests 8 million time-frequency hypothesis per sec

 Open sky cold start – 29 second
 Signal detection better than -161dBm
 Reacquisition sensitivity – 155dBm
 Accuracy 2.5m CEP
 Multipath detection and suppression
 Supports active or passive antenna

Note the following information required by Underwriters Laboratories:

Underwriters Laboratories, Inc. (“UL”) has not tested the performance or reliability of the Global Positioning
System (“GPS”) hardware, operating software or other aspects of this product. UL has only tested for fire, shock
or casualties as outlined in UL’s Standard(s) for Safety.UL60950-1 Certification does not cover the performance
or reliability of the GPS hardware and GPS operating software. UL MAKES NO REPRESENTATIONS,
WARRANTIES OR CERTIFICATIONS WHATSOEVER REGARDING THE PERFORMANCE OR RELIABILITY
OF ANY GPS RELATED FUNCTIONS OF THIS PRODUCT.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 64
 PART 2 – Embedded Wireless ModemsChapter 3 – SocketModem CDMA

The Multi-Tech SocketModem CDMA is a complete, ready-to-integrate, embedded wireless modem. Designed for global use,
it offers standards-based multi-band CDMA200 1x performance. The SocketModem CDMA is based on industry-standard
open interfaces and utilizes Multi-Tech’s universal socket design.
Notes about Activation:
 These units are shipped without network activation.
 To connect to the wireless network, you will have to establish a wireless account. See the Wireless Activation
procedures in a separate document included with your Developer Kit and available on the Developer Kit CD.

Product Description Region Order this Product


MTSMC-C-N1 SocketModem 800/1900 MHz CDMA 1xRTT – Generic Random A-Key Regional
MTSMC-C-N2 SocketModem 800/1900 MHz CDMA 1xRTT – Sprint (USA) US
MTSMC-C-N3 SocketModem 800/1900 MHz CDMA 1xRTT – Verizon (USA) US
MTSMC-C-N4 SocketModem 800 MHz CDMA 1xRTT with R–UIM Regional
MTSMC-C-N9 SocketModem 800/1900 MHz CDMA 1xRTT – Generic Zero A-Key Regional
MTSMC-C-N11 SocketModem 800/1900 MHz CDMA 1xRTT with R-UIM Regional
MTSMC-C-N12 SocketModem 800/1900 MHz CDMA 1xRTT – Bell Mobility Canada Canada
MTSMC-C-N14 SocketModem 800/1900 MHz CDMA 1xRTT – Alltel (USA) US
MTSMC-C-N15 SocketModem 800/1900 MHz CDMA 1xRTT - Telus Canada
MTSMC-C-N16 SocketModem 800/1900 MHz CDMA 1xRTT - Aeris US
Developer Kit
MTSMI-UDK Universal Developer Kit Global
How to Read the Product Codes in the Table Above:
C CDMA
N1 Generic Random A-Key. Requires provisioning. Must be programmed with Provisioning
Information (PRI) and a Preferred Roaming List (PRL).
N2 Sprint USA
N3 Verizon USA
N4 800 MHz with R-UIM
N9 Generic Zero A-Key. Requires provisioning. Must be programmed with Provisioning
Information (PRI) and a Preferred Roaming List (PRL).
N11 800/1900 MHz with R-UIM
N12 Bell Mobility Canada
N14 Alltel USA
N15 Telus Canada
N16 Aeris US
UDK Universal Developer Kit
Other Product Codes:
The complete product code may end in .Rx. For example, MTSMC-C-N3.Rx.
“R” indicates product revision. “x” is the revision number.

Products AT Commands Reference Guide Title and Fax Commands Voice Commands
Document Product Number
SocketModem CDMA CDMA AT Commands Reference Guide (S000294x) NA included in
(MTSMC-C) S000294x

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 65
 PART 2 – Embedded Wireless ModemsChapter 3 – SocketModem CDMA

The SocketModem CDMA (MTSMC-C) meets the following specifications:

Category Description
Standard CDMA2000 1xRTT
Frequency Bands Dual-band 800/1900 MHz CDMA
Serial/Data Speed Serial interface supporting DTE speeds to 230K
Packet data up to 153.6K bps forward and reverse channels
Circuit-switched data up to 14.4K bps
Data Format Asynchronous, transparent and non-transparent
Weight 1.2 oz. (34 g)
Operating Temperature -30° to +70° C
Storage Temperature -40° to +85° C
Humidity 20% to 90% (non-condensing)
Operating Voltage 5VDC
Power Requirements 5V: Typical: 400mA; Maximum: 700mA
Connectors Antenna: MMCX
R-UIM: Standard 3V R-UIM receptacle (For China only, 5V R-UIM)
Certifications & Approvals Safety Certifications
UL 60950
cUL 60950
EN 60950
AS/NZS 60950:2000
EMC Approvals
FCC Part 2, 15, 22, 24
EN 55022
Network
CDG 1 & 2
Warranty 2 years
Features Short Message Services (SMS):
Mobile originated; Mobile terminated
Cell broadcast
Over the Air Activation (OTA)
OTASP; OTAPA
SMS Features: Text & PDU, Point-to-Point, cell broadcast
TCP/IP stack
AT command compatible
Management Features:
Phone book management
Fixed dialing number
Real time clock
Alarm management
Supports AMR (Adaptive Multi Rate) voice coder
Supports Cellular Text Telephone Modem

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 66
 PART 2 – Embedded Wireless ModemsChapter 3 – SocketModem CDMA

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 67
 PART 2 – Embedded Wireless ModemsChapter 3 – SocketModem CDMA

5VDC Characteristics (VDD = 5V ± 0.2V) VDDMAX = 5.25V

Digital Inputs Input High Input Low
–DTR (40), –TXD (35), –RTS (33) Min 2.0V Max 0.8V
–RESET Input High Input Low
Min 2.0V Max 0.5V
Digital Outputs Output High Output Low Current Drive:
–DCD (39), –CTS (38), –DSR (37), –RI (36), –RXD (34) Min 4V Max 0.4V 2mA
Digital Input Capacitance 5 pF

Operating Mode Band Average (mA)

CDMA RXTX Cellular 615
Full Power PCS 770
CMA RXTX Cellular 340
Average Power PCS 445
CDMA Standby Cellular 20
PCS 20

* Multi-Tech Systems, Inc. recommends that the customer incorporate a 10% buffer into their power source when
determining product load.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 68
 PART 2 – Embedded Wireless ModemsChapter 3 – SocketModem CDMA

The flashing LED signal is used to indicate the working mode of the SocketModem.
LED and SocketModem Status
Signal SocketModem Status
OFF Download mode or switched OFF>
ON Continuously lit Switched ON (not registered on the network)
Flashing Switched ON (registered on the network)

Radio Characteristics
CDMA 800 CDMA 1900
Frequency RX 869 to 894 MHz 1930 to 1990 MHz
Frequency TX 824 to 849 MHz 1850 to 1910 MHz
Impedance 50 ohms
VSWR <2
Typical Radiated Gain 0 dBi in at least one direction
Output Power .63W in AMPS
.35W in CDMA

The RF connector on the SocketModem is an MMCX standard type. See Chapter 1 for Antenna System details.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 69
 PART 2 – Embedded Wireless ModemsChapter 3 – SocketModem CDMA

The Difference between a Pre-Provisioned SocketModem CDMA and a Generic

SocketModem CDMA
Pre-Provisioned SocketModem CDMA
Multi-Tech offers several pre-provisioned SocketModem CDMA units (see the Product Ordering Information table
at the beginning of this chapter). Pre-provisioned SocketModem CDMA builds are pre-programmed to operate
only on a designated CDMA carrier’s network; for example, the MTSMC-C-N2 is pre-programmed (provisioned)
for use on the Sprint network in the USA.
Generic SocketModem CDMA
Multi-Tech also offers two generic SocketModem CDMA models, the MTSMC-C-N1 (Random A-Key) and
MTSMC-C-N9 (Zero A-Key). These generic SocketModems are not pre-programmed to operate on any
designated CDMA carrier’s network.

Overview of the Provisioning Process

Requirements
 A generic SocketModem CDMA-C-N1 or -N9.
 AT Commands Reference Guide for the SocketModem CDMA, Chapter 16.
 A developer software tool called WPST.
Procedures
Step 1. Get the PRI and PRL from your wireless carrier.
Step 2. Set the provisioning commands, which are described in the AT Commands Reference Guide for
the SocketModem CDMA, Chapter 16, using the provisioning information provided by the CDMA
wireless network carrier.
Step 3. Using the WPST tool, download the carrier’s specific PRI (Provisioning Information) and PRL
(Preferred Roaming List) into the SocketModem CDMA.
The wireless modem is now provisioned and can be activated on your wireless carrier’s network, according
to the carrier’s activation instructions.
See the Activation directions that accompany Multi-Tech wireless modems.

Provisioning Terminology
A-Key
The A-Key is a 64-bit cryptographic key variable stored in the semi-permanent memory of the mobile station
and also known to the Authentication Center of the wireless carrier's system. The generation of the A-Key is
the responsibility of the wireless service provider. It is established and entered when the mobile station is
first put into service.
The CDMA network carrier you choose for you SocketModem CDMA product will let you know whether it
uses the Random A-Key or the Zero A-Key in its authentication process. That will determine whether you
purchase the -N1 or the –N9 build.
Provisioning
Provisioning is the programming of a SocketModem CDMA wireless modem to set the PRI and PRL
provided by wireless network carrier that you are have chosen as your CDMA wireless network carrier. After
the modem is provisioned, it can then be activated on the wireless network for which it is provisioned. Multi-
Tech provides two SocketModems CDMA builds that are not pre-provisioned: MTSMC-C-N1 and MTCAB-C-
N9.
PRI stands for Provisioning Information. Provisioning Information is your wireless
network carrier’s profile of parameter settings that must be programmed into your
wireless modem in order for it to operate on the carrier’s wireless network.
PRL stands for Preferred Roaming List. The PRL is a list of the wireless network service
provider’s preferred roaming partners. This list is downloaded from your network service
provider during the provisioning process.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 70
 PART 2 – Embedded Wireless ModemsChapter 3 – SocketModem CDMA

This is an alphabetical list of the CDMA cellular industry’s terminology and acronyms.
2G Second Generation. This is an all digital cellular systems developed to replace the first analog
cellular systems. (GSM and CDMA).
3G Third Generation. This is the next generation digital cellular systems designed to have high-speed
data access and higher voice capacity (CDMA & CDMA2000).
CBM Cell Broadcast Message. This is an SMS message that is broadcast to all mobiles on the network.
CDMA CDMA (Code Division Multiple Access). CDMA is a spread spectrum, digital wireless modulation
scheme for cellular communications systems. It has approximately 3 times the voice capacity of
GSM networks. See IS-95, IS-95B, IS-2000.
cdmaONE cdmaOne is a brand name, trademarked and reserved for the exclusive use of the CDMA
Development Group (see their Web site at cdg.org). cdmaOne describes a complete wireless
system that incorporates the IS-95 CDMA air interface, the ANSI-41 network standard for switch
interconnection and many other standards that make up a complete wireless system.
cdma2000 cdma2000 is a third generation (3G) wireless system. It contains a significant increase in voice
capacity and high-speed data rates. It is backward compatible with IS-95B and IS-95A.
cdma2000 1xRTT "1xRTT" stands for 1 times Radio Transmission Technology and is used to identify the version of
CDMA2000 radio technology that operates in a pair of 1.25-MHz radio channels (one times 1.25
MHz, as opposed to three times 1.25 MHz in 3xRTT). Although theoretically capable of higher data
rates, most carrier implementations have limited the peak data rate to 144 kbit/s. While 1xRTT
officially qualifies as 3G technology, 1xRTT is considered by some to be a 2.5G.
ESN "ESN" stands for Electronic Serial Number. It is a 32-bit binary number that identifies each cellular
phone.
Handset (Path) Handset (Path). This is the audio path (microphone & speaker) that connects to a traditional hand
held telephone receiver, usually dual balanced electrical lines.
Headset (Path) Headset (Path). This is the audio path (microphone & speaker) that connects to an earpiece with
a microphone, usually single electrical lines.
IMSI International Mobile Station IS. This is an international 15 digital phone number that uniquely
identifies a mobile. IMSI=MCC + MNC + MIN.
IOTA IOTA stands for Internet Over The Air.
IS-95 IS-95 is the first CDMA standard published by Qualcomm in 1993. It is a TIA standard for North
American cellular systems based on CDMA. It is widely deployed in North America and Asia.
IS-95A IS-95A is a CDMA standard with improved voice quality. IS-95A defines what generally is known as
cdmaOne, which supports voice and 14.4 Kbps data rates. This standard is widely used throughout
the world.
IS-95B IS-95B is a CDMA standard contains Medium Data Rate capabilities and bug fixes for system
access failures. It is considered a 2.5G system. It supports data rates up to 115 Kbps.
IS-2000 IS-2000 is the first 3G CDMA standard based on IS-95B. It contains a significant increase in voice
capacity and high-speed data rates. It is backward compatible with IS-95B and IS-95A.
IS-707 TIA/EIA/IS-707 describes data services available on wideband spread spectrum systems. It is
organized into a series of related recommendations, some of which address functions common to
all CDMA data services and others that describe a specific data service.
MCC Mobile Country Code is a pre-defined 30-digital number that represents a country in the IMSI.
MDN MDN stands for Mobile Data Number or the mobile phone number.
MIN MIN stands for Mobile Identification Number or mobile user account number.
MNC MNC stands for Mobile Network Code, a pre-defined 2-digital number that represents a sub-
network in the IMSI (usually set to “00”).
MO MO stands for Mobile Originated, an action (usually a call) that is first started from the phone. An
outgoing call or SMS.
MS MS stands for Mobile Station. The term MS is commonly used to represent the phone or mobile.
MT MT stands for Mobile Terminated. MT is an action, usually a call that is first started from a land
based network. An incoming call or SMS.
MSM MSM stands for Mobile Station Modem.
NAM NAM stands for Number Assignment Modem. The NAM is collection of internal parameters that
define a working phone for a given network (phone number, access parameters, etc.).
NID NID stands for Network ID. The NID is an identification number that represents geographic location
of a common coverage area; but is a subset of the SID, usually a neighborhood in a large city. NID
is usually not used and is set to zero. Also see SID.
NV-RAM NV-RAM stands for Non-Volatile Random Access Memory. NV-RAM is a data storage device that
does not lose its data when power is turned off.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 71
 PART 2 – Embedded Wireless ModemsChapter 3 – SocketModem CDMA
OTAPA OTAPA stands for Over The Air Parameter Administration. It is an automatic update in internal
software parameters (PRL for example) by means of a specially defined CDMA data call that is
mobile terminated (MT).
OTASP OTASP stands for Over The Air Service Programming. It is an automatic update in internal
software parameters PRL; for example, PRL by means of a specially defined CDMA data call that
is mobile terminated (MT).
P-REV P-REV is the CDMA revision of the mobile or base station.
PDU PDU stands for Protocol Data Unit. It is a GSM SMS standard whereby any type of binary data can
be transported via an SMS message. In the CDMA system, the PDU mode will not be supported;
instead, the Unicode format message is supported.
PN Offset PN Offset stands for Pseudorandom Noise Offset. In a CDMA network the PN offset is a variable
time delay offset of a repeating random noise generator that is used to distinguish individual
sectors of a base station.
PRI PRI stands for Provisioning Information. Provisioning Information is your wireless network carrier’s
profile of information that must be programmed into your wireless modem in order for it to operate
on the carrier’s wireless network.
PRL PRL stands for Preferred Roaming List. The Roaming List is provided by the wireless network
carrier during the process of provisioning your SocketModem. The PRL is a list of wireless service
provider’s preferred roaming partners.
PSTN PSTN stands for Public Switching Telephone Network. It is the traditional telephone network.
RF RF stands for Radio Frequency.
RSSI RSSI stands for Receive Signal Strength Indicator: This parameter represents the total RF received
signal power from the base station(s) the mobile sees.
R-UIM R-UIM stands for Removable User Identity SocketModem. The R-UIM is similar to a SIM
(Subscriber Identity SocketModem), but it is designed for networks other than GSM (Global System
for Mobile Telecommunications); i.e., networks such as CDMA.
The R-UIM card contains user information and data features on a removable smart card about the
size of a postage stamp. It is a dual-mode solution that can store both GSM provisioning and
CDMA provisioning on a single card. When used with a GSM handset, the R-UIM operates like a
GSM SIM.
SID SID stands for System ID. The SID is an identification number that represents geographic locations
of a common coverage area, usually a large city. Also see NID.
SIM SIM stands for Subscriber Identity SocketModem. A SIM card is a portable memory chip. The SIM
holds personal identity information, cell phone number, phone book, text messages and other data.
SMS SMS stands for Short Messaging Service. it is a supplementary service that is capable of sending
and receiving short length text messages to/from the mobile.
TA/TE TA/TE stands for Terminal Application/Terminal Equipment. This is the end “device” (combination
of hardware and software) that communicates with a modem via a serial link. In this context, it is
the device (PDA/Computer) connected to the modem. Also see DTE.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 72
PART 2 – Embedded Wireless Modems Chapter 4 – SocketModem EDGE

The Multi-Tech SocketModem EDGE embedded wireless modem delivers some of the fastest cellular data speeds by utilizing
EDGE technology. It allows users to connect to the Internet and send and receive data up to three times faster than possible
with an ordinary GSM/GPRS network making it ideal for highly data-intensive applications. Based on industry-standard open
interfaces, the SocketModem EDGE wireless modem is equipped with quad-band GSM, which means it can be used
worldwide on all existing GSM networks. In addition, it utilizes Multi-Tech's universal socket design.

Product Description Region Order This Product


MTSMC-E SocketModem Quad Band EDGE Class 10 – 5V Global
MTSMC-E-V SocketModem Quad Band EDGE Class 10 w/Voice – 5V Global
MTSMI-UDK Universal Developer Kit Global

How to Read the Product Codes in the Table Above:

E EDGE
V Voice
UDK Universal Developer Kit
Other Product Codes:
The complete product code may end in .Rx. For example, MTSMC-E.Rx
“R” indicates product revision. “x” is the revision number.

Product Reference Guides Title and Document Product Fax Commands Voice Commands
Number
SocketModem EDGE SocketModem EDGE NA Included in S000371x
(MTSMC-E) AT Commands Reference Guide (S000371x)

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 73
PART 2 – Embedded Wireless Modems Chapter 4 – SocketModem EDGE

The SocketModem EDGE (MTSMC- E) wireless modem meets the following specifications:
Category Description
Standards EDGE: E-GPRS Class 10
GPRS: GPRS Class 12
Data Speed Packet Data rates up to 240K bps (modulation & coding scheme, MCS 1-9, Mobile station
Class B)
Circuit-switched data up to 14.4 bps non-transparent mode, asynchronous
Serial Speed Serial interface supporting DTE speeds to 460K bps
Band Frequency Quad-band 850/900/1800/1900 MHz
Connectors Antenna: MMCX
SIM: Standard 3V SIM receptacle
IP Protocols Supported TCP, UDP, DNS, FTP, SMTP, POP3, HTTP
Operating Voltage 5VDC
Power Consumption See power tables later in this chapter
Operating Temperature -30° to +70° C (FCC certified operating temperature range is -30° to +50° C )
Storage Environment -40° to +85° C
Humidity 20% to 90% non-condensing
Weight 1 oz. (0.028 kg.)
Certifications & Certifications:
Approvals CE Mark
Safety Certifications:
UL 60950
cUL 60950
EN 60950
AS/NZS 60950:2000
EMC Approvals:
FCC Part 2, 15, 22, 24
EN 55022
EN 55024
Network:
PTCRB
Warranty 2 years
Intelligent Features SMS – Text & PDU, Point-to-Point, cell broadcast
AT Command Compatible
Voice features include Half Rate (HR), Full Rate (FR), Enhanced Full Rate (EFR),
Adaptive multi rate (AMR), as well as hands free echo cancellation, and noise reduction
Embedded TCP/IP protocol stack brings Internet connectivity

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 74
PART 2 – Embedded Wireless Modems Chapter 4 – SocketModem EDGE

SocketModem EDGE Wireless Modem Mechanical Drawing

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 75
PART 2 – Embedded Wireless Modems Chapter 4 – SocketModem EDGE

Top View
SocketModem EDGE Pin Out

Note: The following pins are used for the Voice build (MTSMC-E-V) only:
MIC+ (22)
MIC- (23)
SPK+ (43)
SPK- (42)

For pin descriptions, see the Universal Pin Out Descriptions in Chapter 1.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 76
PART 2 – Embedded Wireless Modems Chapter 4 – SocketModem EDGE

I/O Electrical Characteristics

5VDC Characteristics (VDD = 5V ± 0.25V) VDDMAX = 5.25V
Digital Inputs Input High Input Low
–DTR (40), –TXD (35), –RTS (33) Min 2.0V Max 0.8V
–RESET Input High Input Low
Min 2.6V Max 1.0V
Digital Outputs Output High Output Low Current Drive
–DCD (39), –CTS (38), –DSR (37), –RI (36), –RXD (34) Min 4V Max 0.4V 2mA
Digital Input Capacitance 5 pF

Voice Mode Power Consumption

GSM Call Power Consumption in EGSM900 and GSM850 @ 25 degrees C
Voltage Conditions INOM IMAX
+5V During TX bursts @ 2W 1.2 A 2.0 A
+5V Average @ 2W 250mA 335mA
+5V Average idle mode 28mA 35mA

GSM Call Power Consumption in GSM1800 & 1900 MHz @ 25 degrees C

Voltage Conditions INOM IMAX
+5V During TX bursts @ 1W 1.1 A 1.6 A
+5V Average @1W 210mA 285mA
+5V Average idle mode 28mA 35mA

Data Mode Power Consumption

GPRS Class 10 Power Consumption in EGSM/GPRS 900 MHz and GSM/GRPS 850 MHz
Voltage Conditions INOM IMAX
+5V During TX bursts @ 2W 1.5 A 2.0 A
+5V Average @ 2W 400mA 610mA
+5V Average @ 1W 280mA 488mA
+5V Average idle mode 28mA 35mA

GPRS Class 10 Power Consumption in GSM/GRPS 1800 MHz and GSM/GRPS 1900 MHz
Voltage Conditions INOM IMAX
+5V During TX bursts @ 1W 1.1 A peak 1.2 A peak
+5V Average @ 1W 350mA 510mA
+5V Average @ .25W 180mA 460mA
+5V Average idle mode 28mA 35mA

EGPRS Class 10 Power Consumption in EGRPS 900 MHz and EGRPS 850 MHz
Voltage Conditions INOM IMAX
+5V During TX bursts @ 5W 1.4 A peak 1.6 A peak
+5V Average @ .5W 430mA 525mA
+5V Average @ .25W 375mA 450mA
+5V Average idle mode 28mA 35mA

* Multi-Tech Systems, Inc. recommends that the customer incorporate a 10% buffer into their power source when
determining product load.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 77
PART 2 – Embedded Wireless Modems Chapter 4 – SocketModem EDGE

RF performances are compliant with the ETSI recommendation 05.05 and 11.10.
The main parameters are:
Receiver Features
 EGSM Sensitivity : < -108 dBm
 GSM 1800/GSM 1900 Sensitivity : < -107 dBm
 Selectivity @ 200 kHz : > +9 dBc
 Selectivity @ 400 kHz : > +41 dBc
 Dynamic range : 62 dB
 Intermodulation : > -43 dBm
 Co-channel rejection : + 9 dBc

Transmitter Features
 Maximum output power (EGSM) : 24 dBm +/- 2 dB
 Maximum output power (DCS/PCS) : 30 dBm +/- 2 dB
 Minimum output power (EGSM): 5 dBm +/- 5 dB
 Minimum output power (DCS/PCS): 0 dBm +/- 5 dB
 H2 level : < -30 dBm
 H3 level : < -30 dBm
 Noise in 925 - 935 MHz : < -67 dBm
 Noise in 935 - 960 MHz : < -79 dBm
 Noise in 1805 - 1880 MHz : < -71 dBm
 Phase error at peak power : < 5 ° RMS
 Frequency error : +/- 0.1 ppm max

The RF connector on the SocketModem is an MMCX standard type. See Chapter 1 for Antenna System details.

Speaker Output
Differential speaker output capable of driving 8 ohm load. 1.0945 Vpp (differential) typical.

Microphone Input
Balanced microphone input: full scale input 1.1 Vpp.

The MIC inputs are differential ones. They already include the convenient biasing for an electret microphone (0,5 mA
and 2 Volts). This electret microphone can be directly connected on these inputs. The impedance of the microphone
has to be around 2K. These inputs are the standard ones for a handset design.
The gain of the MIC inputs is internally adjusted. The gain can be tuned from 30dB to 51dB. The connection to the
microphone is direct.
MIC2P

C1 = 22pF to 100 pF C1
33 pF recommended

MIC2N

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 78
PART 2 – Embedded Wireless Modems Chapter 5 – SocketModem HSDPA

The Multi-Tech SocketModem HSDPA embedded wireless modem delivers some of the fastest cellular data speeds by
utilizing HSDPA technology. It allows users to connect to the Internet and send and receive data faster than possible with
an ordinary GSM/GPRS network making it ideal for highly data-intensive applications. Based on industry-standard open
interfaces, the SocketModem wireless modem is equipped with quad-band, high-speed RS232 technology, which means
it can be used worldwide on all existing GSM networks. In addition, it utilizes Multi-Tech's universal socket design.

Product Description Region Order This Product


MTSMC-H SocketModem Tri Band HSPDA Serial Modem – 5V Global
MTSMC-H-U SocketModem Tri Band HSPDA USB Modem – 5V Global
MTSMI-UDK Universal Developer Kit Global

How to Read the Product Codes in the Table Above:

H HSDPA (High-Speed Downlink Packet Access)
U USB
UDK Universal Developer Kit

Other Product Codes:

The complete product code may end in .Rx. For example, MTSMC-H.Rx.
“R” indicates product revision. “x” is the revision number.

Product Reference Guides Title and Document Product Fax Commands Voice Commands
Number
SocketModem HSDPA SocketModem HSDPA NA NA
(MTSMC-H) AT Commands Reference Guide (S000453x)

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 79
PART 2 – Embedded Wireless Modems Chapter 5 – SocketModem HSDPA

The SocketModem HSDPA (MTSMC- H) wireless modem meets the following specifications:

Category Description
General
Frequency Bands • UMTS/HSDPA: Triple band, 850/1900/2100MHz
• GSM/GPRS/EDGE: Quad band, 850/900/1800/1900MHz
GSM Class Small MS
Output power Class 4 (+33dBm ±2dB) for EGSM850
(according to Release 99) Class 4 (+33dBm ±2dB) for EGSM900
Class 1 (+30dBm ±2dB) for GSM1800
Class 1 (+30dBm ±2dB) for GSM1900
Class E2 (+27dBm ± 3dB) for GSM 850 8-PSK
Class E2 (+27dBm ± 3dB) for GSM 900 8-PSK
Class E2 (+26dBm +3 /-4dB) for GSM 1800 8-PSK
Class E2 (+26dBm +3 /-4dB) for GSM 1900 8-PSK
Class 3 (+24dBm +1/-3dB) for UMTS 2100, WCDMA FDD BdI
Class 3 (+24dBm +1/-3dB) for UMTS 1900,WCDMA FDD BdII
Class 3 (+24dBm +1/-3dB) for UMTS 850, WCDMA FDD BdV
Power Supply 5VDC  10%
Physical Description 3.1" L x 1.4" W x 0.5" H; 1 oz.
(7.8 cm x 3.5 cm x 1.2 cm; 28 g)
HSDPA Features
3GPP Release 5 3.6 Mbps, UL 384 kbps
UE CAT. [1-6], 11, 12 supported
Compressed mode (CM) supported according to 3GPP TS25.212
UMTS Features
3GPP Release 4 PS data rate – 384 kbps DL / 384 kbps UL
CS data rate – 64 kbps DL / 64 kbps UL
GSM / GPRS / EGPRS Features
Data Transfer GPRS
• Multislot Class 10
• Full PBCCH support
• Mobile Station Class B
• Coding Scheme 1 – 4
EGPRS
• EDGE E2 power class for 8 PSK
• Downlink coding schemes – CS 1-4, MCS 1-9
• Uplink coding schemes – CS 1-4, MCS 1-9
• BEP reporting
• SRB loopback and test mode B
• 8-bit, 11-bit RACH
• PBCCH support
• 1 phase/2 phase access procedures
• Link adaptation and IR
• NACC, extended UL TBF
• Mobile Station Class B
CSD
• V.110, RLP, non-transparent
• 9.6 kbps
SMS Point-to-point MT and MO
Cell broadcast
Text and PDU mode
Software
AT Commands AT GSM 07.05 and 07.07, Siemens
AT commands for RIL compatibility (NDIS/RIL)
Microsoft Compatibility RIL / NDIS for Windows Mobile®
SIM Application Toolkit SAT Class C
Firmware Update Firmware update from host application over USB and ASC0

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 80
PART 2 – Embedded Wireless Modems Chapter 5 – SocketModem HSDPA

Category Description
Interfaces
USB USB 2.0 full speed (12Mbit/s)
CDC ACM compliant
NDIS driver included (XP only)
Serial Modem Interface 8-wire modem interface with status and control lines, unbalanced,
asynchronous.
UICC Interface Supported chip cards: SIM / UICC 3V, 1.8V
Connectors Antenna: MMCX
SIM: Standard 3V SIM receptacle
SocketModem Interface Socket pins
Operating Environment
Operating Temperatures Min -30 °C Typ +25 °C Max +60 °C
Storage Environment -40° to +85° C
Humidity 20% to 90% non-condensing
Certifications, Approvals, Directives, Warranty
Certifications & Approvals Certifications:
CE Mark, R&TTE
Safety Certifications:
UL 60950-1
EN 60950-1
EMC Approvals:
FCC Part 22, 24
EN 301 489-1
EN 301 489-7
RSS 132, 133
Network:
PTCRB
RoHS All hardware components fully compliant with EU RoHS Directive
Warranty 2 years

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 81
PART 2 – Embedded Wireless Modems Chapter 5 – SocketModem HSDPA

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 82
PART 2 – Embedded Wireless Modems Chapter 5 – SocketModem HSDPA

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 83
PART 2 – Embedded Wireless Modems Chapter 5 – SocketModem HSDPA

I/O Electrical Characteristics

5VDC Characteristics (VDD = 5V ± 0.25V) VDDMAX = 5.25V
Digital Inputs Input High Input Low
–DTR (40), –TXD (35), –RTS (33) Min 2.0V Max 0.8V
–RESET Input High Input Low
Min 2.6V Max 1.0V
Digital Outputs Output High Output Low Current Drive
–DCD (39), –CTS (38), –DSR (37), –RI (36), –RXD (34) Min 4V Max 0.4V 2mA
Digital Input Capacitance 5 pF

Data Mode Power Consumption

GPRS Power Consumption in EGSM/GPRS 900 MHz and GSM/GRPS 850 MHz
Voltage Conditions INOM IMAX
+5V During TX bursts @ 2W 1.8 A 2.9 A
+5V Average Class 8 375mA
+5V Average Class 10 540mA
+5V Average idle mode 40mA

GPRS Power Consumption in GSM/GRPS 1800 MHz and GSM/GRPS 1900 MHz
Voltage Conditions INOM IMAX
+5V During TX bursts @ 1W 1.5 A 2.1 A
+5V Average Class 8 325mA
+5V Average Class 10 430mA
+5V Average idle mode 40mA

EGPRS Power Consumption in EGRPS 900 MHz and EGRPS 850 MHz
Voltage Conditions INOM IMAX
+5V During TX bursts @ 2W 1.8 A 2.9 A
+5V Average Class 8 315mA
+5V Average Class 10 410mA
+5V Average idle mode 40mA

EGPRS Power Consumption in EGRPS 1800 MHz and EGRPS 1900 MHz
Voltage Conditions INOM IMAX
+5V During TX bursts @ 2W 1.8 A 2.9 A
+5V Average Class 8 290mA
+5V Average Class 10 355mA
+5V Average idle mode 40mA

WCDMA Power Consumption

Voltage Conditions INOM IMAX
+5V UMTS Data transfer Band I @+10dBm 390mA
+5V HSDPA Data transfer Band I @+10dBm 450mA
+5V UMTS Data transfer Band I @+23dBm 750mA 820mA1
+5V HSDPA Data transfer Band I @+23dBm 775mA 850mA1
+5V UMTS Data transfer Band II @+10dBm 455mA
+5V HSDPA Data transfer Band II @+10dBm 500mA
+5V UMTS Data transfer Band II @+23dBm 810mA 930mA1
+5V HSDPA Data transfer Band II @+23dBm 850mA 930mA1
+5V UMTS Data transfer Band V @+10dBm 390mA
+5V HSDPA Data transfer Band V @+10dBm 420mA
+5V UMTS Data transfer Band V @+23dBm 620mA 790mA1
+5V HSDPA Data transfer Band V @+23dBm 640mA 820mA1
1 Under total mismatch conditions at antenna connector.
* Multi-Tech Systems, Inc. recommends that the customer incorporate a 10% buffer into their power source when
determining product load.
Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 84
PART 2 – Embedded Wireless Modems Chapter 5 – SocketModem HSDPA

RF performances are compliant with the ETSI recommendation 05.05 and 11.10.
The main parameters are:
Receiver Features
 EGSM Sensitivity : < -108 dBm
 GSM 1800/GSM 1900 Sensitivity : < -107 dBm
 Selectivity @ 200 kHz : > +9 dBc
 Selectivity @ 400 kHz : > +41 dBc
 Dynamic range : 62 dB
 Intermodulation : > -43 dBm
 Co-channel rejection : + 9 dBc
Transmitter Features
 Maximum output power (EGSM) : 24 dBm +/- 2 dB
 Maximum output power (DCS/PCS) : 30 dBm +/- 2 dB
 Minimum output power (EGSM): 5 dBm +/- 5 dB
 Minimum output power (DCS/PCS): 0 dBm +/- 5 dB
 H2 level : < -30 dBm
 H3 level : < -30 dBm
 Noise in 925 - 935 MHz : < -67 dBm
 Noise in 935 - 960 MHz : < -79 dBm
 Noise in 1805 - 1880 MHz : < -71 dBm
 Phase error at peak power : < 5 ° RMS
 Frequency error : +/- 0.1 ppm max

The RF connector on the SocketModem is an MMCX standard type. See Chapter 1 for Antenna System details.

Air Interface GSM / UMTS

Parameter Conditions Min. Typ. Max. Unit
HSDPA / UMTS Connectivity Band I, II, V
UMTS Frequency Range UMTS 850 Band V 824 849 MHz
Uplink (UE to Node B) UMTS 1900 Band II 1850 1910 MHz
UMTS 2100 Band I 1920 1980 MHz
UMTS Frequency Range UMTS 850 Band V 869 894 MHz
Downlink (Node B to UE) UMTS 1900 Band II 1930 1990 MHz
UMTS 2100 Band I 2110 2170 MHz
Receiver Input Sensitivity @ UMTS 850 Band V -109 dBm
ARP UMTS 1900 Band II -107 dBm
UMTS 2100 Band I -108 dBm
RF Power@ ARP with UMTS 850 Band V +21 +23 +25 dBm
50Ohm Load UMTS 1900 Band II +21 +23 +25 dBm
UMTS 2100 Band I +21 +23 +25 dBm
GPRS Coding Schemes Class 10, CS1 to CS4
EGPRS Class 10, MCS1 to MCS9
GSM Class Small MS
GSM Frequency range GSM 850 824 849 MHz
Uplink (MS to BTS) E-GSM 900 880 915 MHz
GSM 1800 1710 1785 MHz
GSM 1900 1850 1910 MHz

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 85
PART 2 – Embedded Wireless Modems Chapter 5 – SocketModem HSDPA

GSM Frequency range GSM 850 869 894 MHz

Downlink (BTS to MS) E-GSM 900 925 960 MHz
GSM 1800 1805 1880 MHz
GSM 1900 1930 1990 MHz
Static Receiver input Sensitivity GSM 850 -102 -108 dBm
@ ARP E-GSM 900 -102 -108 dBm
GSM 1800 -102 -107 dBm
GSM 1900 -102 -107 dBm
RF Power@ ARP with GSM 850 31 32 35 dBm
50Ohm Load E-GSM 900 31 32 35 dBm
(GSM; 1 TX) GSM 1800 28 29.25 32 dBm
GSM 1900 28 29.25 32 dBm
RF Power@ ARP with GSM 850 32 dBm
50Ohm Load E-GSM 900 32 dBm
(GPRS; 1 TX) GSM 1800 29.25 dBm
GSM 1900 29.25 dBm
RF Power@ ARP with GSM 850 27 dBm
50Ohm Load E-GSM 900 27 dBm
(EGPRS; 1 TX) GSM 1800 26 dBm
GSM 1900 26 dBm
RF Power@ ARP with GSM 850 30.50 dBm
50Ohm Load E-GSM 900 30.50 dBm
(GPRS; 2 TX) GSM 1800 27.75 dBm
GSM 1900 27.75 dBm
RF Power@ ARP with GSM 850 25 dBm
50Ohm Load E-GSM 900 25 dBm
(EGPRS; 2 TX) GSM 1800 24 dBm
GSM 1900 24 dBm

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 86
PART 2 – Embedded Wireless Modems Chapter 5 – SocketModem HSDPA

All recent distributions of Linux Kernel v2.6 or higher and CDC_ACM USB will work well with the HSPDA modem.
Follow procedure outlined here using the HSDPA on Linux SLAX 6, an efficient live distribution you can install on a
USB stick. See www.slax.org.
1. Set the HSDPA in modem mode so that it can be enumerated automatically:
AT^SUSB="Startup","Mdm"
AT^SMSO
2. Boot SLAX
3. Plug the USB cable into the PC
4. Enable enumeration in a terminal:
modprobe usbserial vendor=0x0681 product=0x0047
5. Make sure that the modem was enumerated
ls -la /dev/ttyUSB*
The response should be: /dev/ttyUSB0
6. Launch KPPP&
7. Create a new account with AT&T:
Dial *99***1#
8. Create a new modem
HC25
Modem device: /dev/ttyUSB0
Flow control: None
Line Termination: CR
Connection Speed: 921600
9. Add modem commands to the initialization string; i.e., ATZ and AT+CGDCONT=1,"IP","isp.cingular"
10. Enter PAP authentication
Login and enter password as usual

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 87
PART 2 – Embedded Wireless Modems Chapter 5 – SocketModem HSDPA

MTSMC-H SocketModem Baud Rate dip switch settings

Switch Bank

● ● ● ● 920K
1 2 3 4

●
● ● ● 460K
1 2 3 4

●
● ● ● 230K
1 2 3 4

● ● 115K
● ● SocketModem
1 2 3 4 Default

●
● ● ● 57.6K
1 2 3 4

● ●
● ● 38.4K
1 2 3 4

● ●
● ● 19.2K
1 2 3 4

● ● ●
● 9.6K
1 2 3 4

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 88
PART 2 – Embedded Wireless Modems Chapter 5 – SocketModem HSDPA

The table below briefly summarizes the various operating modes.

Mode Function
Normal GSM / GPRS / UMTS / HSDPA Power saving mode set automatically when no call is in
operation SLEEP (for USB only) progress and the USB connection is suspended by host or not
present.
GSM IDLE Software is active. Once registered to the GSM network,
paging with BTS is carried out in order to achieve synchrony
with the GSM network. The repetition rate depends on the
parameter BSPA_Multiframe. The SocketModem is ready to
send and receive.
GSM TALK Connection between two subscribers is in progress. Power
consumption depends on the GSM network coverage and
several connection settings (e.g. DTX off/on, FR/EFR/HR,
hopping sequences and antenna connection). The following
applies when power is to be measured in TALK_GSM mode:
DTX off, FR and no frequency hopping, otherwise same as for
IDLE measurements.
GPRS IDLE The SocketModem is attached and ready for GPRS data
transfer, but no data is currently sent or received.
GPRS DATA GPRS data transfer in progress. Power consumption depends
on network settings (e.g. power control level), uplink / downlink
data rates and GPRS configuration (e.g., used multislot
settings).
EGPRS DATA EGPRS data transfer in progress. Power consumption
depends on network settings (e.g. power control level), uplink /
downlink data rates and EGPRS configuration (e.g., used
multislot settings).
UMTS / HSDPA IDLE The SocketModem is attached and ready for UMTS / HSDPA
data transfer, but no data is currently sent or received.

UMTS DATA UMTS data transfer in progress. Power consumption depends

on network settings (e.g., TPC Pattern) and data transfer rate.

HSDPA DATA HSDPA data transfer in progress. Power consumption

depends on network settings (e.g., TPC Pattern) and data
transfer rate.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 89
PART 2 – Embedded Wireless Modems Chapter 5 – SocketModem HSDPA

The best and safest approach to powering down is to issue the AT^SMSO command. This procedure lets the
SocketModem log off from the network and allows the software to enter into a secure state and safe data before
disconnecting the power supply. The mode is referred to as Power-down mode. In this mode, only the RTC stays
active.
After sending AT^SMSO do not enter any other AT commands. There is one way to verify that the SocketModem
turns off:
Wait for the ”OK” – response. It indicates that data has been stored non-volatile and that the SocketModem turns
after about one second.
Important Note: The SocketModem requires a reset to become active again.

Automatic shutdown takes effect if:

 The modem exceeds the critical limits of overtemperature or undertemperature.
The board temperature is constantly monitored by an internal NTC resistor. The values detected by the NTC
resistor are measured directly on the board and are therefore not fully identical with the ambient temperature.
Each time the board temperature goes out of range or back to normal, the modem instantly displays an alert (if
enabled).
 URCs indicating the level "1" or "-1" allow the user to take appropriate precautions, such as protecting
the SocketModem from exposure to extreme conditions. The presentation of the URCs depends on the
settings selected with the AT^SCTM write command:
AT^SCTM=1: Presentation of URCs is always enabled.
AT^SCTM=0 (default): Presentation of URCs is enabled for 15 seconds time after startup. After 15
seconds operation, the presentation will be disabled, i.e. no alert messages can be generated.
 URCs indicating the level "2" or "-2" are instantly followed by an orderly shutdown, except in cases of
temperature control during an emergency call (see paragraph below). The presentation of these URCs
is always enabled; i.e., they will be output even though the factory setting AT^SCTM=0 was never
changed.

Temperature-Dependent Alerts
Sending temperature alert (15s after start-up; otherwise, only if URC presentation enabled)
^SCTM_B: 1 Caution: SocketModem close to over-temperature limit.
^SCTM_B: -1 Caution: SocketModem close to under-temperature limit.
^SCTM_B: 0 SocketModem back to uncritical temperature range.
Automatic shutdown (URC appears no matter whether or not presentation was enabled)
^SCTM_B: 2 Alert: SocketModem is above over-temperature limit and switches off.
^SCTM_B: -2 Alert: SocketModem is below under-temperature limit and switches off.

Notes:
 The MTSMC-H will not transmit temperature URC alerts.
 The URCs will not display in data mode.

If the temperature limit is exceeded while an emergency call is in progress the engine continues to measure the
temperature, but deactivates the shutdown functionality. If the temperature is still out of range when the call ends, the
SocketModem switches off immediately (without another alert message).

The modem is able to reduce its functionality to a minimum (during the so-called SLEEP mode) in order to minimize
its current consumption. The following sections explain the SocketModem’s network dependant power saving
behavior.
The implementation of the USB host interface also influences the SocketModem’s power saving behavior and
therefore its current consumption. During normal WCDMA operation; i.e., the modem is connected to a WCDMA
network, the duration of a power-saving period varies. It may be calculated using the following formula:
t = 2DRX value * 10 ms (WCDMA frame duration).

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 90
PART 2 – Embedded Wireless Modems Chapter 5 – SocketModem HSDPA

Power Saving While Attached to GSM Networks

The power saving possibilities while attached to a GSM network depend on the paging timing cycle of the base
station. The duration of a power saving interval can be calculated using the following formula:
t = 4.615 ms (TDMA frame duration) * 51 (number of frames) * DRX value.
DRX (Discontinuous Reception) is a value from 2 to 9, resulting in paging intervals between 0.47 and 2.12
seconds. The DRX value of the base station is assigned by the GSM network operator.
In the pauses between listening to paging messages, the SocketModem resumes power saving, as shown in the
figure below.

Power Saving and Paging in GSM Networks

The varying pauses explain the different potential for power saving. The longer the pause the less power is
consumed.
Generally, power saving depends on the SocketModem’s application scenario and may differ from the above
mentioned normal operation. The power saving interval may be shorter than 0.47 seconds or longer than 2.12
seconds.

Power Saving While Attached to WCDMA Networks

The power saving possibilities while attached to a WCDMA network depend on the paging timing cycle of the
base station.
During normal WCDMA operation, i.e., the SocketModem is connected to a WCDMA network, the duration of a
power saving period varies. It may be calculated using the following formula:
t = 2DRX value * 10 ms (WCDMA frame duration).
DRX (Discontinuous Reception) in WCDMA networks is a value between 6 and 9, thus resulting in power saving
intervals between 0.64 and 5.12 seconds. The DRX value of the base station is assigned by the WCDMA
network operator.
In the pauses between listening to paging messages, the SocketModem resumes power saving, as shown in the
figure below.

Power Saving and Paging in WCDMA Networks

The varying pauses explain the different potential for power saving. The longer the pause the less power is
consumed.
Generally, power saving depends on the SocketModem’s application scenario and may differ from the above
mentioned normal operation. The power saving interval may be shorter than 0.64 seconds or longer than 5.12
seconds.

Power Saving During Network Search, GSM/WCDMA

The power saving interval during network search depends on the network registration mode configured for the
modem. This mode can be specified with the AT^SCFG command parameter MEopMode/RM:
• In "Fast" mode, the power saving interval may last for up to 5 seconds.
• In "Normal" mode, the power saving interval may last for up to 40 seconds.
For details on how to configure the AT^SCFG parameter MEopMode/RM see the HSDPA AT Command Guide.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 91
PART 2 – Embedded Wireless Modems Chapter 5 – SocketModem HSDPA

USB Interface
The SocketModem supports a USB 2.0 Full Speed (12Mbit/s) device interface. A USB host has to support at
least 6 ‘Message Pipes” to work with the HSPDA USB interface.
The USB I/O-pins are capable of driving the signal at min 3.0V. They are 5V I/O compliant.
The USB interface is powered by VUSB. VUSB must be supplied by USB host in the range 4.5 to 5.25V. The
maximum load in VUSB is 10mA.
While the USB connection is active, the SocketModem will not change into SLEEP Mode. To enable switching
into SLEEP mode the USB host must bring its USB interface into Suspend state. On incoming calls, the
SocketModem will then generate a remote wake up request to resume the USB connection.
Note: The MTSMC-H will not transition to sleep mode.

USB Interface Signal Descriptions

Signal Name I/O Signal Form and Level Commend
VUSB I VINmin = 4.5V If lines are unused,
VINmax = 5.25V keep pins open.
Active current:
IItyp = 2.5mA
IImax = 10mA
Suspend current:
IItyp = 900μA
USB_DP I/O Input sensitivity (Diff), If lines are unused,
USB_DN I/O |D+ - D-|, VIN = 0.8V to 2.5V: keep pins open.
0.2V min
Common mode range (Diff),
VIN = 0.8V to 2.5V
Receiver threshold (single-end),
Vthresholdmin = 0.8V
Vthresholdmax = 2.0V
Receiver hysteresis,
Vhystyp = 200mV

Note: For more information about the USB interface, see the separate USB Reference Guide available on the
Universal Guide CD.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 92
 Part 3
Analog SocketModems
PART 3 – Embedded Analog SocketModems Chapter 6 – SocketModem (MT9234SMI)

Multi-Tech’s SocketModem creates communication-ready devices by integrating data/fax/voice functionality into a single
product design. The SocketModem is a space-efficient (1" × 2.5"), embedded modem that provides V.92/56K communication.
The complete, ready-to-integrate modem dramatically reduces development time and costs for system designers.
The MT9234SMI SocketModems are used for integrating data and fax communications. They are single-port modems that
integrate the controller, DSP, and DAA in a 1" x 2.5" form factor and communicate to a host controller via an asynchronous
serial interface.

Product Description Region Order this

Product

MT9234SMI
MT9234SMI-92 V.92 Serial Data, V.34 Fax, 5V Global
MT9234SMI-L-92 V.92 Serial Data, V.34 Fax, 3.3V Global
MT9234SMI-P-92 V.92 Parallel Data, V.34 Fax, 5V Global
MT9234SMI-P-L-92 V.92 Parallel Data, V.34 Fax, 3.3V Global
MT9234SMI-HV-92 V.92 Serial Data, V.34 Fax, High Voltage, 5V Global
MT9234SMI-P-HV-92 V.92 Parallel Data, V.34 Fax, High Voltage, 5V Global
Telecom Label
MT9234SMI-LS MT9234SMI – Global Regulatory Label Global
Developer Kits
MTSMI-UDK Universal Developer Kit Global
MTSMI-P-UDK SocketModem Parallel Developer Kit Global

How to Read the Product Codes in the Table Above:

92 V.92/56K data rate
HV High Voltage 2KV Dielectric Isolation (EN60601)
L 3.3V
P Parallel interface
LS Telecom Label
UDK Universal Developer Kit
Other Product Codes:
The complete product code may end in .Rx. For example, MT9234SMI-92.Rx.
“R” indicates product revision. “x” is the revision number.

Product Reference Guides Title and Document Fax Commands Voice Commands
Product Number
SocketModem MT9234SMI AT Commands Reference See separate Fax Guides: Included in S000434x
(MT9234SMI) Guide (S000434x) Class 1: S000262x
Class 2 S000239x

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 94
PART 3 – Embedded Analog SocketModems Chapter 6 – SocketModem (MT9234SMI)

The SocketModem (MT9234SMI) meets the following specifications:

Category Description
Data Standards V.92, V.34 enhanced, V.34, V.32bis, V.32, V.22bis, V.22; Bell 212A and Bell 103
Data Format Serial, or 8-bit parallel interface, asynchronous
Character Format 10 bit or 11 bit
Serial/Data Speeds Serial port data rates adjustable to 300, 1200, 2400, 4800, 9600, 19200, 38400,
57600, 115200, and 230400 bps
Client-to-Client Data Rates 33600, 31200, 28800, 26400, 24000, 21600, 19200, 16800, 14400, 12000, 9600,
7200, 4800, 2400, 1200, 0-300 bps
Data Error Correction (ECM) V.44; V.42 (LAPM, MNP 2-4)
Data Compression V.42bis, MNP 5
Fax Compatibility V.17, V.29/V.27/V.21, V.34
Fax Class Class 1 &1.0 – All builds
Class 2, 2.0/2.1 – All builds
Fax Compression MH, MR, MMR
Fax Error Correction Mode ECM
Modes of Operation Fax online modes; full duplex over dial-up lines; data mode; command mode;
online command mode; V.54 test mode
Weight 0.6 oz. (0.017 kg.)
Operating Temperature -40° to +85° C
Storage Temperature -40° to +85° C
Humidity 20% to 90% (non-condensing)
Operating Voltage 3.3V and 5V
Power Requirements MT9234SMI
3.3V
Typical: 122mA (0.40W @ 3.3VDC)
Maximum: 136mA (0.49W @ 3.6VDC)
Sleep Mode: 90mA to 95mA (.297W to .3135W @ 3.3VDC)
5V
Typical: 125mA (0.62W @ 5VDC)
Maximum: 138mA (0.72W @ 5.25VDC)
Note: Multi-Tech Systems, Inc. recommends that the customer incorporate a 10%
buffer into their power source when determining product load.
Transmit Level - 11 dBm (varies by country setting)
Receiver Sensitivity - 43 dBm under worst-case conditions
DAA Isolation MT9234SMI
1.5Kv r.m.s. or 2121 VDC at working voltage of 250VAC
MT9234SMI
2Kv r.m.s. or 2828VDC at working voltage of 125VAC
Flow Control XON/XOFF (software), RTS/CTS (hardware)
Command Buffer 60 characters
Telephony / TAM TAM: S-101 AT+V commands (no CODEC for speakers/microphone interface)
Certifications & Approvals Safety Certifications
UL 60950
cUL 60950
EN 60950
AS/NZS 60950:2000
CCC
Safety Certifications for HV Builds
UL 60601-1
EN 60601-1
EMC Approvals
FCC Part 15
Canadian EMC
EN 55022
EN 55024
GB4943, GB9254
Warranty 2 years

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 95
PART 3 – Embedded Analog SocketModems Chapter 6 – SocketModem (MT9234SMI)

Category Description
Intelligent Features Fully AT command compatible
Leased-line operation
Sleep mode
Autodial, redial
Pulse or tone dial
Dial pauses
Auto answer
Adaptive line probing
Automatic symbol and carrier frequency during start-up, retrain, and rate
renegotiations
DTMF detection
Callback security
Distinctive ring
Voice record and playback
Call status display, auto-parity and data rate selections
Keyboard-controlled modem options
On-screen displays for modem option parameters
Remote configuration
DTR dialing
Phone number storage
Flash memory for firmware updates
NVRAM storage for user-defined parameters

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 96
PART 3 – Embedded Analog SocketModems Chapter 6 – SocketModem (MT9234SMI)

The MT9234SMI SocketModem uses a 20-pin interface to provide an on-board DAA with tip and ring connections,
audio circuit for call-progress monitoring, LED driver for call status annunciation, and serial interface.

Note: The bolded, shaded pins are the active MT9234SMI pins.

Top View
Serial SocketModem Pin Out

For pin descriptions, see the Universal Pin Out Descriptions in Chapter 1.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 97
PART 3 – Embedded Analog SocketModems Chapter 6 – SocketModem (MT9234SMI)

The parallel configuration is not compatible with the serial universal socket.
The Parallel SocketModem uses a 22-pin interface to provide an on-board DAA with tip and ring connections, audio
circuit for call-progress monitoring, and parallel interface.
Note: The bolded, shaded pins are the active MT9234SMI-P (Parallel) pins.

Top View – Parallel SocketModem Pins

Pin Descriptions for a Parallel SocketModem Device
Pin # Signal I/O Description
1 Tip I/O Telephone Line Interface – TIP
2 Ring I/O Telephone Line Interface – RING
24 –RESET I Modem Reset (with pull-up). Active low –RESET input resets the SocketModem logic and
returns AT command set to original factory defaults or to NVRAM 'stored values' . The modem
is ready to accept commands within 6.5 seconds of power-on or reset. Reset must be
asserted for a minimum of 30ms.
25 A1 I Host Bus Address Line 1
26 DGND GND Digital Ground
27 D7 O Host Bus Data Line 7
29 D2 O Host Bus Data Line 2
30 INT O Host Bus Interrupt Line. INT output is set high when the receiver error flag, receiver data
available, transmitter holding register empty, or modem status interrupt have an active high
condition. INT is reset low upon the appropriate interrupt service or master reset operation.
31 A0 I Host Bus Address Line 0.
32 –WR I Host Bus Write. –WR is an active low, write control input. When –DS is low, –WR low
allows the host to write data or control words into a selected modem register.
33 –RD I Host Bus Read. –RD is an active low, read control input. When –DS is low, –RD low allows
the host to read status information or data from a selected modem register.
34 A2 I Host Bus Address Line 2
35 D4 O Host Bus Data Line 4
36 D5 O Host Bus Data Line 5
37 D0 O Host Bus Data Line 0
38 D1 O Host Bus Data Line 1
39 D3 O Host Bus Data Line 3
40 –DS I Host Bus Device Select. –DS input low enables the modem for read or write.
41 D6 O Host Bus Data Line 6
61 VCC PWR +5 V or 3.3 V Supply (depends upon model).
63 AGND GND Analog Ground. This is tied common with DGND on the SocketModem. To minimize
potential ground noise issues, connect audio circuit return to AGND.
64 SPKR O Speaker Output. SPKR is a single ended-output. It is tied to the CODEC through a series
6.8K resistor and .1uf cap.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 98
PART 3 – Embedded Analog SocketModems Chapter 6 – SocketModem (MT9234SMI)

5V Serial – Standard (SMI) and Medical Device (SMI-HV) Build Options

5VDC Characteristics (VDD = 5V ± 0.25V) VDDMAX = 5.25V
Digital Inputs Input High Input Low
–DTR (40), –TXD (35), –RTS (33) Min 2.52V Max .9V
–Reset (24) Input High Input Low
Min 2.52V Max 0.3V
Digital Outputs Output Output Low Current Drive
–DCD (39), –CTS (38), –DSR (37), High Max 0.4V 2mA
–RI (36), –RXD (34) Min 2.3V
Digital Input Capacitance 5 pF

5V Parallel – Standard (SMI) and Medical Device (SMI-HV) Build Options

5VDC Characteristics (VDD = 5V ± 0.25V) VDDMAX = 5.25V
Digital Inputs Input High Input Low
–DS (40) Min 2.52V Max 0.9V
Digital Inputs (hysteresis input buffer) Input High Input Low
A0 (31), A1 (25), A2 (34), Min 2.52V Max 0.9V
–WR (32), –RD (33)
Digital Input / Output Input High Input Low
Output buffer can source 12 mA at 0.4 V Min 2.52V Max 0.9V
DO (37), D1 (38), D2 (29), D3 (39), D4 (35), D5
(36), D6 (41), D7 (27)
Digital Output Output High Output Low Current Drive
INT (30) Min 2.3V Max 0.4V 2mA
Digital Input Capacitance 5 pF

3.3V Serial – Industrial Temperature (SMI-L) Build Option

3.3VDC Characteristics (VDD = 3.3V ± 0.3V) VDDMAX = 3.6V
Digital Inputs Input High Input Low
–DTR (40), –TXD (35), –RTS (33) Min 2.52V Max 0.9V
–Reset (24) Input High Input Low
Min 2.52V Max 0.3V
Digital Outputs
Output High Output Low Current Drive
–DCD (39), –CTS (38), –DSR (37), –RI (36),
Min. 2.3V Max 0.4V 2mA
–RXD (34)
Digital Input Capacitance 5 pF

3.3V Parallel – Industrial Temperature (SMI-L) Build Options

3.3VDC Characteristics (VDD = 3.3V ± 0.3V) VDDMAX = 3.6V
Digital Inputs Input High Input Low
–DS (40) Min 2.52V Max 0.9V
Digital Inputs (hysteresis input buffer) Input High Input Low
A0 (31), A1 (25), A2 (34), –WR (32), –RD (33) Min 2.52V Max 0.9V
Digital Input/Output Input High Input Low
Output buffer can source 12 mA at 0.4 V Min 2.52V Max 0.9V
DO (37), D1 (38), D2 (29), D3 (39), D4 (35), D5 (36),
D6 (41), D7 (27)
Digital Output Output High Output Low Current Drive
INT (30) Min 2.3V Max 0.4V 2mA
Digital Input Capacitance 5 pF

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 99
PART 3 – Embedded Analog SocketModems Chapter 6 – SocketModem (MT9234SMI)

Timing Requirements for Parallel Write

Parameter Min Max Unit
–DS to –WR Setup (low to low) 10 - ns
A0, A1, A2 to –WR Setup (valid to low) 15 - ns
–WR Pulse Width (low to high) 40 - ns
D0–D7 to –WR Setup (valid to high) 30 - ns
–WR to –DS hold (high to high) 0 - ns
–WR to A0–A2 Hold (high to invalid) 0 - ns
–WR to D0–D7 Hold (high to invalid) 0 - ns
–WR interaccess (high to low)
Non-MIMIC Accesses 10 - ns
MIMIC Accesses 110 - ns

Timing Requirements for Parallel Read

Parameter Min Max Unit
–DS to –RD Setup (low to low) 10 - ns
A0, A1, A2 to –RD Setup (valid to low) 15 - ns
–RD Pulse Width (low to high) 40 - ns
–RD to –DS hold (high to high) 0 - ns
–RD to A0–A2 Hold (high to invalid) 0 - ns
–WR interaccess (high to low)
Non-MIMIC Accesses 10 - ns
MIMIC Accesses 110 - ns

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 100
PART 3 – Embedded Analog SocketModems Chapter 6 – SocketModem (MT9234SMI)

The SocketModem parallel interface is a mimic of a 16C550A UART. It is similar to the MIMIC interface used in the Zilog
Z80189. The SocketModem mimic (MMM) takes advantage of this standard interface while replacing the serial to parallel data
transfer with a less complicated parallel to parallel data transfer.
The MMM interface controls an 8-bit parallel data transfer which is typically interrupt driven. Interrupts usually indicate one or
both of two conditions: (1) the receive (RX) FIFO has either reached a trigger level or time-out condition and needs to be
emptied and/or (2) the transmit (TX) FIFO is empty and waiting for more data from the Host. An interrupt can also be triggered
by a change in the modem status register (i.e., loss of carrier) or by the occurrence of errors in the line status register (overrun,
parity, framing, break detect).
In addition to the receive and transmit FIFOs, there are twelve other control/status registers called the MMM register set which
can be accessed through this interface.

SocketModem MIMIC (MMM) Operation

Data flow through MMM is bi-directional. Simultaneously, data can flow from the host through the transmit FIFO
to the SocketModem controller, and data can flow from SocketModem controller through the receive FIFO to the
Host. In the receive path, 8-bit data is asynchronously received (from the SocketModem controller) by the
receive FIFO where it is stored along with associated three error bits. The error bits must arrive (via a
SocketModem controller I/O write to MMM shadow line status register) prior to receiving the actual data bits. The
error bits are then temporarily stored so they may be written, with associated data bits, to the 11-bit wide RX
FIFO.
After every data write, the RX FIFO write pointer is incremented. RX FIFO trigger levels, data ready signal, and
time-out counter are checked to see if a Host-interrupt needs to be sent. The data ready signal will be activated
and MMM sits poised to accept another data word.
We highly recommend the host should read the MMM IIR register to determine the type of interrupt. Then it might
check bit 7 of the LSR to see if there are any errors in the data currently residing in the receive FIFO. Finally, it
will (1) alternately read a data word through the RX FIFO read pointer and the error bits via the MMM LSR until
the FIFO is empty, or (2) read successive data words (knowing there were no errors in the FIFO) until the trigger
count is met.
A similar sequence occurs when data flows in the other direction (from host through transmit FIFO), except there
is no error bit manipulation/checking involved.

FIFO Operation
The 16-byte transmit and receive data FIFOs are enabled by the FIFO Control Register (FCR) bit-0. You can
set the receive trigger level via FCR bits 6/7. The receiver FIFO section includes a time-out function to
ensure data is delivered to the external host. An interrupt is generated whenever the Receive Holding
Register (RHR) has not been read following the loading of a character or the receive trigger level has been
reached.

Receive (RX) FIFO

The RX FIFO can be configured to be 16 words deep and 11 bits wide. Each word in the RX FIFO consists
of 8 data bits and 3 error bits. The RX block of the MMM contains read and write pointers and status flag
circuitry that need only to be presented with data (for input), reset, read/write control signals, and read/write
clock signals. The RX block of the MMM internally manages the FIFO register file and pointers, and it
provides simultaneous read/write capability (no contention problems).
The RX block of the MMM provides data (for output), FIFO full flag, FIFO empty flag, and an almost full flag
which uses an associated predefined trigger level (obtained from the MMM FCR control register) to signal
when the trigger level has been met. Four possible trigger levels may be selected by programming bits 6-7
of the FCR control register.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 101
PART 3 – Embedded Analog SocketModems Chapter 6 – SocketModem (MT9234SMI)

A typical (interrupt driven) write to the RX block is a two-step process. The MMM micro-controller must first
write the 3 error bits to a shadow MMM LSR status register. Next, the micro-controller writes the data to the
RX FIFO and during this write operation, the 3 error bits are directly loaded from the LSR shadow register
into the bits 8-10 of the selected (11 bit-wide) FIFO register. These error bits represent the parity error,
framing error, and break interrupt signals associated with each data work transmission into the receive
FIFO. When the receive FIFO is read, these error bits are loaded directly into bits 2-4 of the MMM LSR
register.

A2 A1 A0 Register Name Register Description Host Access

0 0 0 RBR Receive Buffer (RX FIFO) DLAB = 0 R only
0 0 0 THR Transmit Holding (TX FIFO) DLAB = 0 W only
0 0 1 IER Interrupt Enable DLAB = 0 R/W
0 1 0 IIR Interrupt Identification DLAB = X R only
0 1 0 FCR FIFO Control DLAB = X W only
0 1 1 LCR Line Control DLAB = X R/W
1 0 0 MCR Modem Control DLAB = 0 R/W
1 0 1 LSR Line Status DLAB = X R only
1 1 0 MSR Modem Status DLAB = X R only
1 1 1 SCR Scratch pad DLAB = 0 R/W
0 0 0 DLL LSB of Divisor Latch DLAB = 1 R/W
0 0 1 DLM MSB of Divisor Latch DLAB = 1 R/W
1 1 1 DLX Divisor Latch DLAB = 1 R/W
1 0 0 MCX Status/Control DLAB = 1 R/W

Note 1* The General Register set is accessible only when DS is a logic 0.

Note 2* The Baud Rate register set is accessible only when DS is a logic 0 and LCR bit-7 is a logic 1.

Time Out Interrupts

The interrupts are enabled by IER bits 0-3. Care must be taken when handling these interrupts. Following a
reset the transmitter interrupt is enabled, the SocketModem will issue an interrupt to indicate that transmit
holding register is empty. This interrupt must be serviced prior to continuing operations.
The LSR register provides the current singular highest priority interrupt only. A condition can exist where a
higher priority interrupt may mask the lower priority interrupt(s). Only after servicing the higher pending
interrupt will the lower priority interrupt(s) be reflected in the status register. Servicing the interrupt without
investigating further interrupt conditions can result in data errors. When two interrupt conditions have the
same priority, it is important to service these interrupts correctly.
Receive Data Ready and Receive Time Out have the same interrupt priority (when enabled by IER bit-3).
The receiver issues an interrupt after the number of characters received have reached the programmed
trigger level. In this case the MMM FIFO may hold more characters than the programmed trigger level.
Following the removal of a data byte, the user should recheck LSR bit-0 for additional characters. A Receive
Time Out will not occur if the receive FIFO is empty. The time out counter is reset at the center of each stop
bit received or each time the receive holding register (RHR) is read.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 102
PART 3 – Embedded Analog SocketModems Chapter 6 – SocketModem (MT9234SMI)

The following table delineates the assigned bit functions for the twelve internal registers. The assigned bit functions are more
fully defined in the following paragraphs.

Internal Registers
A2 A1 A0 Register BIT-7 BIT-6 BIT-5 BIT-4 BIT-3 BIT-2 BIT-1 BIT-0
[Default] *3
General Register Set: Note 1*
0 0 0 RBR [XX] Bit-7 Bit-6 Bit-5 Bit-4 Bit-3 Bit-2 Bit-1 Bit-0
0 0 0 THR [XX] Bit-7 Bit-6 Bit-5 Bit-4 Bit-3 Bit-2 Bit-1 Bit-0
0 0 1 IER [00] 0 0 0 0 Modem Receive Transmit Receive
Status Line Holding Holding
Interrupt Status Register Register
interrupt interrupt interrupt
0 1 0 IIR [XX] FIFO FIFO 0 0 Interrupt Interrupt Interrupt Interrupt
enable enable ID ID ID Pending
0 1 0 FCR [00] RX RX Detect TX FIFO DMA XMIT RCVR FIFO
Trigger trigger change overrun mode FIFO FIFO reset enable
(MSB) (LSB) in FCR bit select reset
0 1 1 LCR [00] Divisor Set Stick Even Parity 0 Word Word
latch break parity parity enable length bit- length
access 1 bit-0
(DLAB)
1 0 0 MCR [00] 0 0 0 Loop INT OUT 1 -RTS -DTR
back enable
1 0 1 LSR [60] RX TX THR Break Framing Parity Overrun Receive
FIFO empty Empty interrupt error error error data
data THR ready
error empty
1 1 0 MSR [X0] CD RI DSR CTS Delta Delta Delta Delta
-CD -RI -DSR -CTS
1 1 1 SCR [FF] Bit-7 Bit-6 Bit-5 Bit-4 Bit-3 Bit-2 Bit-1 Bit-0
Special Register Set: Note *2
0 0 0 DLL [00] Bit-7 Bit-6 Bit-5 Bit-4 Bit-3 Bit-2 Bit-1 Bit-0
0 0 1 DLM [00] Bit-7 Bit-6 Bit-5 Bit-4 Bit-3 Bit-2 Bit-1 Bit-0

Note: 1* The General Register set is accessible only when DS is a logic 0.

2* The Baud Rate register set is accessible only when DS is a logic 0 and LCR bit-7 is a logic 1.
3* The value between the square brackets represents the register's initialized HEX value, X = N/A.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 103
PART 3 – Embedded Analog SocketModems Chapter 6 – SocketModem (MT9234SMI)

RBR – Receive Buffer (RX FIFO)

All eight bits are used for receive channel data (host read/data in; host write/data out). The three error bits per
byte are copied into bits 2, 3, and 4 of the LSR during each host I/O read; therefore, they are available for
monitoring on a per-byte basis.

THR – Transmit Holding Register (TX FIFO)

All eight bits are used for transmit channel data (host write/data out; host read/data in).

IER – Interrupt Enable

Bits 4–7: Reserved and will always read 0.
Bits 0-3: Set by host software only and cleared by software control or host reset.
Bit 3: Enables modem status IRQ. If bits 0–3 of the MSR are set and this bit is set to 1 (enabled), a host
interrupt is generated.
Bit 2: Enables receive line status IRQ. If bits 1–4 (overrun, parity, framing, break errors) of the LSR are set
and this bit is set to a logic 1, a host interrupt is generated.
Bit 1: Enables transmit holding register IRQ. If bit 5 (transmit holding register empty) of the LSR is set and
this bit is set to a 1, a host interrupt is generated.
Bit 0: Enables received data available IRQ. If bit 0 (data ready) of the LSR is set and this bit is set to a 1, a
host interrupt is generated.

IIR – Interrupt Identification (Read Only)

Bits 6–7: (FIFO enabled bits). These bits will read a 1 if FIFO mode is enabled and the 16450 enable bit is 0
(no force of 16450 mode).
Bits 4–5: Reserved and always read a 0.
Bits 1–3: Interrupt ID bits.
Bit 0: Interrupt pending. If logic 0 (in default mode), an interrupt is pending.

When the host accesses IIR, the contents of the register are frozen. Any new interrupts will be recorded, but not
acknowledged during the IIR access. This requires buffering bits (0–3, 6–7) during IIR reads.

Interrupt Sources and Reset Control Table

Bit 3 Bit 2 Bit 1 Priority Interrupt Source Interrupt Reset Control

0 1 1 Highest Overrun, parity, framing, error Reading the LSR

or break detect bits set by
SocketModem Controller
0 1 0 2nd Received data trigger level RX FIFO drops below trigger
level
1 1 0 2nd Receiver time-out with data in Read RX FIFO
RX FIFO
0 0 1 3rd TX holding register empty Writing to TX holding
register or reading IIR when
TX holding register is source
of error
0 0 0 4th MODEM status: CTS, DSR, RI Reading the MSR
or DCD

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 104
PART 3 – Embedded Analog SocketModems Chapter 6 – SocketModem (MT9234SMI)

FCR – FIFO Control

Bits 6–7: Used to determine RX FIFO trigger levels.
Bit 5: Used to detect a change in the FCR.
Bit 4: TX FIFO overrun bit.
Bit 3: DMA mode select. If bit 3 is a 0, the 16450 mode is enabled which does only single-byte transfers.
When bit 3 is a 1, it enables a multiple byte (FIFO mode) data transfer.
Bit 2: TX FIFO reset. This will cause TX FIFO pointer logic to be reset (any data in TX FIFO will be lost).
This bit is self clearing; however, a shadow bit exists that is cleared only when read by the host, thus
allowing the host to monitor a FIFO reset.
Bit 1: RX FIFO reset. This will cause RX FIFO pointer logic to be reset (any data in RX FIFO will be lost).
This bit is self clearing; however, a shadow bit exists that is cleared only when read by the host, thus
allowing the host to monitor a FIFO reset.
Bit 0: FIFO enable. The host writes this bit to logic 1 to put the block in FIFO mode. This bit must be a 1
when writing other bits in this register or they will not be programmed. When this bit changes state,
any data in the FIFOs or the RBR and THR registers will be lost and any pending interrupts are
cleared.
Bit 7 Bit 6 16 Deep FIFO Trigger Levels (# of bytes) Default
0 0 1
0 1 4
1 0 8
1 1 14

LCR – Line Control

Bit 7: Divisor latch access bit. This bit allows the host, access to the divisor latch. Under normal
circumstances, the bit is set to 0 (provides access to the RX and TX FIFOs at address 0). If the
bit is set to 1, access to transmitter, receiver, interrupt enable, and modem control registers is
disabled. In this case, when an access is made to address 0, the divisor latch least (DLL)
significant byte is accessed. Address 1 accesses the most significant byte (DLM). Address 7
accesses the DLX divisor latch register. Address 4 accesses the MCX status/control register.
Bit 6: Used to denote a host-generated set break condition.
Bits 0,1,3,4,5: Used only in parity bit generation for the 7 bit data byte case. Bits 0 and 1 are used for word
length select (b0 = 0 and b1 = 1 is used for 7 bit data). Bit 3 is parity enable. Bit 4 is even parity
select. Bit 5 is stick parity.

MCR – Modem Control

Bits 5–7: Reserved, and will always be 0.
Bit 4: Used for loopback. When a 1, bits 0–3 of the MCR are reflected in modem status register (MSR)
as follows: RI <= OUT1, DCD <= OUT2, DSR <= DTR, CTS <= RTS. Emulation of loopback
feature of 16550 UART must be done by the host except for the above conditions. Also, when
this bit is set, it allows for data loop back. This means the host can write a data word to the TX
and immediately read back the same data word from the RX (in a manner similar to the 16550A).
Bit 3: Controls the signal used to 3-state the host interrupt. If 0, then an active-low L33xV output will be
set to 0, and this signal will be used to 3-state the host interrupt output pin.
Bits 0–2: Used during LOOP function.
Bit 2: OUT1.
Bit 1: Request to Send (RTS).
Bit 0: Data terminal ready (DTR).

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 105
PART 3 – Embedded Analog SocketModems Chapter 6 – SocketModem (MT9234SMI)

LSR – Line Status

Bit 7: Error in RX FIFO. This bit is always set to 1 if at least one data byte in the RX FIFO has an error.
This will clear when there are no more errors in the RX FIFO.
Bit 6: Transmitter empty. This bit is the same as LSR bit 5 (THRE) in MMM
Bit 5: Transmitter holding register empty. This bit is set to 1 when either the transmitter holding register
has been read (emptied) by the micro-controller (16450 mode) or the TX FIFO is empty (16550
mode). This bit is set to 0 when either the THR or the TX FIFO becomes not empty in 16450
mode. In 16550 mode, it is set to 0 only after the trigger level has been met since the last
occurrence of TX FIFO empty. If the transmitter timer is enabled, a shadow bit exists which
delays the timer setting this bit to 1. When reading this bit, the micro-controller will not see the
delay. Both shadow and register bits are cleared when the host writes to the THR or TX FIFO in
16450 mode. The trigger level must be reached to clear the bit in 16550 (FIFO) mode.
Bits 2–4: Used for parity error, framing error, and break detect. These bits are written, indirectly, by the
micro-controller as follows: The bits are first written to the shadow bit locations when the micro-
controller write accesses the LSR. When the next character is written to the receive buffer (RBR)
or the RX FIFO, the data in the shadow bits is then copied to the RBR (16450 mode) or RX FIFO
(16550 mode). In FIFO mode, bits become available to the host when the data byte associated
with the bits is next to be read. In FIFO mode, with successive reads of the receiver, the status
bits will be set if an error occurs on any byte. Once the micro-controller writes to the RBR or RX
FIFO, the shadow bits are auto cleared. The register bits are updated with each host read.
Bit 1: Overrun error. This bit is set if the micro-controller makes a second write to RBR before the host
reads data in the buffer (16450 mode) or with a full RX FIFO (16550 mode). No data will be
transferred to the RX FIFO under these circumstances. This bit is reset when the host reads the
LSR.
Bit 0: Data ready bit. This bit is set to 1 when received data is available, either in the RX FIFO (16550
mode) or the RBR (16450 mode). This bit is set immediately upon the micro-controller writing
data to the RBR or FIFO if the receive timer is not enabled, but it is delayed by the timer interval
if the receive timer is enabled. For micro-controller read access, a shadow bit exists so that the
micro-controller does not see the delay that the host sees. Both bits are cleared to logic 0
immediately upon reading all data in either RBR or RX FIFO.

MSR – Modem Status

Bits 4 through 7 of the MSR can also take on the MCR bits 0 through 3 value when in MCR loop mode (i.e. when
MCR b4 = 1). The transfer of bits in loop back has a null modem twist (i.e. MCR b0 goes to MSR b5 and MCR
b1goes to MSR b4).
Bit 7: Data carrier detect (DCD) bit.
Bit 6: Ring indicator (RI) bit.
Bit 5: Data set ready (DSR) bit.
Bit 4: Clear to send (CTS) bit.
Bit 3: Delta data carrier detect pin. This bit is set to a 1 whenever the data carrier detect bit changes
state. It is reset when the host reads the modem status register.
Bit 2: Trailing edge ring indicator bit. This bit is set to 1 on the falling edge of the ring indicator bit. It is
reset when the host reads the modem status register.
Bit 1: Delta data set ready bit. This bit is set to 1 whenever the data set ready changes state. It is reset
when the host reads the modem status register.
Bit 0: Delta clear to send bit. This bit is a one whenever the clear to send bit changes state. It is reset
when the host reads the modem status register.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 106
PART 3 – Embedded Analog SocketModems Chapter 6 – SocketModem (MT9234SMI)

SCR – Scratch
The host programmer uses this register for temporary data storage.

DLL – Divisor Latch (LSByte)

This register contains low-order byte for the 16-bit clock divider. It is kept to maintain register set compatibility with the
16C550A interface. However, it is not used for clock generation since MMM does not require the generation of a real
baud clock.

DLM – Divisor Latch (MSByte)

This register contains high-order byte for the 16-bit clock divider. It is kept to maintain register set compatibility with
the 16C550A interface. However, it is not used for clock generation, since MMM does not require the generation of a
real baud clock.
Programming the Baud Rate Generator Registers DLM (MSB) and DLL (LSB) provides a user capability for selecting
the desired final baud rate. The example in the Table below shows the selectable baud rates available when using a
1.8432 MHz external clock input.
BAUD RATE GENERATOR PROGRAMMING TABLE
Baud 16 x Clock Divisor (Decimal) DLM Value (HEX) DLL Value (HEX)
Rate
110 1047 04 17
300 384 01 80
600 192 00 C0
1200 96 00 60
2400 48 00 30
4800 24 00 18
9600 12 00 0C
19.2K 6 00 06
38.4K 3 00 03
57.6K 2 00 02
115.2K 1 00 01

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 107
PART 3 – Embedded Analog SocketModems Chapter 6 – SocketModem (MT9234SMI)

OEM Motherboard

Filtering and Surge Protection Options

See Design Considerations and Recommended Parts in Chapter 1.

Recommended Uses for Filtering Options

 Enhanced Surge Protection with RJ-11 Filtering
Use this option when additional lightning protection may be needed.
 Alternate Common Mode with RJ-11 Filtering
Use this option when your design has common mode emission issues.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 108
PART 3 – Embedded Analog SocketModems Chapter 7 – SocketModem (MT5600SMI and MT5656SMI)

The Multi-Tech SocketModem creates communication-ready devices by integrating data/fax/voice functionality into a single
product design. The SocketModem is a space-efficient (1" × 2.5"), embedded modem that provides V.92 or V.34/33.6K data
communication. The complete, ready-to-integrate modem dramatically reduces development time and costs for system
designers.
The MT5600SMI/MT5656SMI SocketModem is a standard 64-pin modem used for integrating data communications.
 It is a single-port modem that integrates the controller, DSP, and DAA in a 1" x 2.5" form factor and communicates to a
host controller via an asynchronous serial interface.
 It is available with an 8-bit parallel interface.

Product Description Region Order This

Product

MT5600SMI
MT5600SMI-32 V.32bis Serial Data/Fax 5V Global
MT5600SMI-L-32 V.32bis Serial Data/Fax 3.3V Global
MT5600SMI-P-32 V.32bis Parallel Data/Fax 5V Global
MT5600SMI-34 V.34bis Serial Data/Fax 5V Global
MT5600SMI-L-34 V.34bis Serial Data/Fax 3.3V Global
MT5600SMI-P-34 V.34bis Parallel Data/Fax 5V Global
MT5600SMI-P-L-34 V.34bis Parallel Data/Fax 3.3V Global
MT5600SMI-X-L-34 V.34bis Serial Data/Fax 3.3V (Exclude LED pins) Global
MT5600SMI-92 V.92 Serial Data/Fax 5V Global
MT5600SMI-L-92 V.92 Serial Data/Fax 3.3V Global
MT5600SMI-P-92 V.92 Parallel Data/Fax 5V Global
MT5600SMI-P-L-92 V.92 Parallel Data/Fax 3.3V Global
MT5600SMI-X-L-92 V.92 Serial Data/Fax 3.3V (Exclude LED pins) Global
Telecom Label
MT5600SMI-LS MT5600SMI-Global Regulatory Label (50 Pack) Global
MT5600SMI-NALTE MT5600SMI PRC (People’s Republic of China) NALTE PRC
Regulatory Label
MT5656SMI
MT5656SMI-V-32 V.32bis Serial Data/Fax, Speakerphone Interface 5V Global
MT5656SMI-P-V-32 V.32bis Parallel Data/Fax, Speakerphone Interface 5V Global
MT5656SMI-V-34 V.34 Serial Data/Fax, Speakerphone Interface 5V Global
MT5656SMI-P-V-34 V.34bis Parallel Data/Fax, Speakerphone Interface 5V Global
MT5656SMI-V-92 V.92 Serial Data/Fax, Speakerphone Interface 5V Global
MT5656SMI-P-V-92 V.92 Parallel Data/Fax, Speakerphone Interface 5V Global
Developer Kits
MTSMI-UDK SocketModem Serial Developer Kit Global
MTSMI-P-UDK SocketModem Parallel Developer Kit Global
How to Read the Product Codes in the Above Table:
32 V.32bis/14.4K data rate L 3.3V power input (default is 5 V)
34 V.34/33.6K data rate P Parallel interface (serial is default)
92 V.92/56K data rate X Excludes LED Pin Outs
V Speakerphone I/O UDK Universal Developer Kit
Other Product Codes:
The complete product code may end in .Rx. For example, MT5656SMI-V-32.Rx.
“R” indicates product revision. “x” is the revision number.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 109
PART 3 – Embedded Analog SocketModems Chapter 7 – SocketModem (MT5600SMI and MT5656SMI)

Product Reference Guides Title and Document Fax Commands Voice Commands
Product Number
SocketModem MT5600SMI and MT5656SMI AT Commands Included in S000306x Included in S000306x
(MT5600/5656SMI) Reference Guide (S000306x)

The SocketModem (MT5600SMI and MT5656SMI) meets the following specifications:

Category Description
Data Standards V.92, V.90, V.34, V.32bis, V.32, V.22bis, V.22, V.23, V.21 Bell 212A & Bell 103
Data Format Serial, 8-bit parallel interface, asynchronous
Character Format 10 bit or 11 bit
Serial/Data Speeds Serial port data rates adjustable to 300, 1200, 2400, 4800, 9600, 19200, 38400, 57600,
115200, and 230400 bps
Client-to-Client Data Rates 33600, 31200, 28800, 26400, 24000, 21600, 19200, 16800, 14400, 12000, 9600, 7200,
4800, 2400, 1200, 0-300 bps
Data Error Correction V.42 (LAP-M or MNP 2–4)
Data Compression V.42bis, MNP 5
Fax Compatibility V.17, V.29/V.27/V.21
Fax Class For MT5600SMI: Class 1, 1.0; For MT5656SMI: Class 1, 2
Fax Compression MH, MR, MMR
Fax Error Correction Mode EMC
Modes of Operation Full duplex over dial-up lines; data mode, command mode, online command mode
Weight 0.6 oz. (0.017 kg.)
Operating Temperature 0° to +70° C
Storage Temperature -40º to +85° C
Humidity 20% to 90% (non-condensing)
Operating Voltage 3.3V Serial; 5V Serial or Parallel
Power Requirements 3.3V (MT5600SMI Only) Typical: 115mA (.38W @ 3.3VDC)
Maximum: 116mA (.41W @ 3.6VDC)
5V (MT5600SMI & MT5656SMI) Typical: 117mA (.58W @ 5VDC)
Maximum: 118mA (.61W @ 5.25VDC)
Note: Multi-Tech Systems, Inc. recommends that the customer incorporate a 10%
buffer into their power source when determining product load.
Transmit Level -11dBm (varies by country)
Receiver Sensitivity -43 dBm
DAA Isolation 1.5Kv r.m.s. or 2121 VDC at working voltage of 250VAC
Flow Control XON/XOFF (software), RTS/CTS (hardware)
Command Buffer 60 characters
Telephony/TAM V.253 commands
8 kHz sample rate
Concurrent DTMF, distinctive ring, and "Bell Core Type 1" Caller ID
Supported PCM Encoding:
2-bit and 4-bit ADPCM, 8-bit linear PCM, and 4-bit IMA coding
Certifications & Approvals Safety Certifications
UL 60950
cUL 60950
EN 60950
AS/NZS 60950:2000
CCC
EMC Approvals
FCC Part 15 (Class B)
Canada (Class B)
EN 55022 (Class B)
EN 55024
Warranty 2 years

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 110
PART 3 – Embedded Analog SocketModems Chapter 7 – SocketModem (MT5600SMI and MT5656SMI)

Category Description
Intelligent Features V.22bis Fast Connect
FastPOS (V.29)
Voice send and receive functions
LED pin output option
DTMF detection and distinctive ring
Audio circuit outputs for audio call-progress monitoring
Three-number storage for automatic dialing capabilities and non-volatile memory
(NoVRAM) to store user profiles
Speaker interface for call progress monitoring
Full-duplex data transmission over dial-up lines
Line quality monitoring and retrain
Line protection circuitry included
Auto-dial, redial, and auto-answer
Extension pickup detection, remote hang-up detection, line-in-use detection, digital PBX
detection and protection
Pulse or tone dial
Call status display
Extension pickup detection
Remote hang-up detection
Digital PBX detection and protection
60-character command line buffering
AT command compatibility
Global approvals with a single SocketModem design
Intelligent DAA technology detects line status
MT5656SMI supports speakerphone I/O
MT5656SMI supports "Bell Core Type 1" Caller ID

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 111
PART 3 – Embedded Analog SocketModems Chapter 7 – SocketModem (MT5600SMI and MT5656SMI)

The serial interface uses a 20-pin interface to provide an on-board DAA with tip and ring connections, audio circuit for call-
progress monitoring and serial interface via logic level signals.
Note: The bolded, shaded pins are the active SocketModem pins.

Top View – Serial SocketModem Pin Out – MT5600SMI (Available with or without LEDs)

MT5656SMI Serial with Voice Pin Out

The serial interface uses a 21-pin interface to provide an on-board DAA with tip and ring connections, audio circuit for
call-progress monitoring and serial interface via logic level signals.
Note: The bolded, shaded pins are the active SocketModem pins.

Top View – Serial SocketModem – MT5656SMI Pin Out with Voice Configuration
For pin descriptions, see the Universal Pin Out Descriptions in Chapter 1.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 112
PART 3 – Embedded Analog SocketModems Chapter 7 – SocketModem (MT5600SMI and MT5656SMI)

Parallel Pin Out

Note: The parallel configuration is not compatible with the serial universal socket.
The parallel interface SocketModem uses a 22-pin interface to provide an on-board DAA with tip and ring
connections, audio circuit for call-progress monitoring, and parallel interface.

Top View
Parallel SocketModem Pin Out

Parallel Pin Descriptions

Pin # Signal In Out Description
Name Type
1 Tip I/O Telephone Line Interface – TIP
2 Ring I/O Telephone Line Interface – RING
24 –RESET I Modem Reset (CMOS input with pull-up). The active low –RESET input
resets the SocketModem logic and returns the AT command set to the original
factory default values or to "stored values" in NVRAM.
The modem is ready to accept commands within 6.5 seconds of power-on or
reset. Reset must be asserted for a minimum of 15ms.
25 A1 I Host Bus Address Line 1
26 DGND GND Digital Ground
27 D7 O Host Bus Data Line 7
29 D2 O Host Bus Data Line 2
30 INT O Host Bus Interrupt Line (Active High, Resets on Low)
31 A0 I Host Bus Address Line 0
32 –WR I Host Bus Write. When low, allows host to write to SocketModem.
33 –RD I Host Bus Read. When low, allows host to read from SocketModem.
34 A2 I Host Bus Address Line 2
35 D4 O Host Bus Data Line 4
36 D5 O Host Bus Data Line 5
37 D0 O Host Bus Data Line 0
38 D1 O Host Bus Data Line 1
39 D3 O Host Bus Data Line 3
40 –DS I Host Bus Device Select (or Chip Select) (Active Low)
41 D6 O Host Bus Data Line 6
61 VCC PWR 3.3 V or 5 V Supply (depends upon model).
62 MICV I Single-Ended Microphone. Single-ended microphone input for dial-up
SocketModem speakerphone and TAM functions.
63 AGND GND Analog Ground. This is tied common with DGND on the SocketModem. To
minimize potential ground noise issues, connect audio circuit return to AGND.
64 SPKR O Speaker – Call monitor.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 113
PART 3 – Embedded Analog SocketModems Chapter 7 – SocketModem (MT5600SMI and MT5656SMI)

3.3V Serial SocketModem

3.3VDC Characteristics (VDD = 3.3V ± 0.3V) VDDMAX = 3.6V
Inputs Input High Input Low
–DTR (40), –TXD (35), –RTS (33), –RESET (24) Min 2.0V Max 0.8V
Outputs Output High Output Low
–DCD (39), –CTS (38), –DSR (37), –RI (36), –RXD (34) Min 2.4V Max 0.5V
2 mA, Z INT = 120 
Digital Input Capacitance 50pF

3.3V Parallel SocketModem

3.3VDC Characteristics (VDD = 3.3V ± 0.3V) VDDMAX = 3.6V
Digital Inputs Input High Input Low
–DS (40) Min 2.0V Max 0.8V
Digital Inputs (hysteresis input buffer) Input High Input Low
A0 (31), A1 (25), A2 (34), –WR (32), –RD (33) Min 2.0V Max 0.8V
8mA Z INT = 50 2 mA Z INT = 120 
Digital Input/Output Input High Input Low
DO (37), D1 (38), D2 (29), D3 (39), D4 (35), D5 (36), Min 2.0V Max 0.8V
D6 (41), D7 (27) Output High Output Low
2 mA, Z INT = 120  Min 2.4V Max 0.5V
Digital Output Output High Output Low
INT (30) Min 2.4V Max 0.5V
2 mA, Z INT = 120 
Digital Input Capacitance 50pF

5V Serial SocketModem
5VDC Characteristics (VDD = 5V ± 0.25V) VDDMAX = 5.25V
Digital Inputs Input High Input Low
–DTR (40), –TXD (35), –RTS (33), –RESET (24) Min 2V Max 0.8V
Digital Outputs Output High Output Low Current Drive
–DCD (39), –CTS (38), –DSR (37), –RI (36), –RXD (34) Min 2.4V Max 0.5V 15mA
Digital Input Capacitance 5pF

5V Parallel SocketModem
5VDC Characteristics (VDD = 5V ± 0.25V) VDDMAX = 5.25V
Digital Inputs Input High Input Low
–DS (40) Min 2V Max 0.8V
Digital Inputs (hysteresis input buffer) Input High Input Low
A0 (31), A1 (25), –WR (32), –RD (33) Min 2V Max 0.8V
Digital Input / Output Input High Input Low Current Drive
DO (37), D1 (38), D2 (29), D3 (39), D4 (35), D5 (36), Min 2V Max 0.8V 8mA
D6 (41), D7 (27)
Digital Output Output High Output Low Current Drive
INT (30) Min 2.4 V Max 0.5 V 8mA
Digital Input Capacitance 5pF

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 114
PART 3 – Embedded Analog SocketModems Chapter 7 – SocketModem (MT5600SMI and MT5656SMI)

Symbol Parameter Min Max Units

READ (See Notes)
tAS
Address Setup 5 - ns
tAH
Address Hold 10 - ns
tCS
Chip Select Setup 0 - ns
tCH
Chip Select Hold 10 - ns
tRD
RD Strobe Width 45 - ns
tDD
Read Data Delay - 25 ns
tDRH
Read Data Hold 5 - ns
WRITE (See Notes)
tAS
Address Setup 5 - ns
tAH
Address Hold 15 - ns
tCS
Chip Select Setup 0 - ns
tCH
Chip Select Hold 10 - ns
tWT
WT Strobe Width 75 - ns
tDS
Write Data Setup (see Note 4) - 20 ns
tDWH
Write Data Hold (see Note 5) 5 - ns
Notes:
1. When the host executes consecutive Rx FIFO reads, a minimum delay of 2 times the internal CPU clock
cycle plus 15 ns (85.86 ns at 28.224 MHz) is required from the falling edge of RD to the falling edge of the
next Host Rx FIFO RD clock.
2. When the host executes consecutive Tx FIFO writes, a minimum delay of 2 times the internal CPU clock
cycle plus 15 ns (85.86 ns at 28.224 MHz) is required from the falling edge of WT to the falling edge of the
next Host Tx FIFO WT clock.
3. tRD' tWT = tCYC + 15 ns.
4. tDS is measured from the point at which both CS and WT are active.
5. tDWH is measured from the point at which either CS and WT become active.
6. Clock Frequency = 28.224 MHz clock.

Parallel Host Bus – Read Parallel Host Bus - Write

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 115
PART 3 – Embedded Analog SocketModems Chapter 7 – SocketModem (MT5600SMI and MT5656SMI)

The modem supports a 16550A interface in parallel interface versions. The 16550A interface can operate in FIFO mode or
non-FIFO mode. Non-FIFO mode is the same as the 16450-interface operation. FIFO mode’s unique operations are described
in this chapter.

The modem emulates the 16450/16550A interface and includes both a 16-byte receiver data first-in first-out buffer
(RX FIFO) and a 16-byte transmit data first-in first-out buffer (TX FIFO).

FIFO Mode Selected

When FIFO mode is selected in the FIFO Control Register (FCR0 = 1), both FIFOs are operative. Furthermore,
when FIFO mode is selected, DMA operation of the FIFO can also be selected (FCR3 = 1).

FIFO Mode Not Selected

When FIFO mode is not selected, operation is restricted to a 16450-interface operation.

Receive Data
Received Data is read by the host from the Receiver Buffer (RX Buffer). The RX Buffer corresponds to the
Receiver Buffer Register in a 16550A device. In FIFO mode, the RX FIFO operates transparently behind the RX
Buffer. Interface operation is described with reference to the RX Buffer in FIFO and non-FIFO modes.

Transmit Data
Transmit Data is loaded by the host into the Transmit Buffer (TX Buffer). The TX Buffer corresponds to the
Transmit Holding Register in a 16550A device. In FIFO mode, the TX FIFO operates transparently behind the TX
Buffer. Interface operation is described with reference to the TX Buffer in both FIFO and non-FIFO modes.

Receiver FIFO Interrupt Operation

Receiver Data Available Interrupt
When the FIFO mode is enabled (FCR0 = 1) and receiver interrupt (RX Data Available) is enabled (IER0 =
1), receiver interrupt operation is as follows:
1. The Receiver Data Available Flag (LSR0) is set as soon as a received data character is available in the
RX FIFO. LSR0 is cleared when RX FIFO is empty.
2. The Receiver Data Available Interrupt code (IIR0-IIR4 = 4h) is set whenever the number of received
data bytes in the RX FIFO reaches the trigger level specified by FCR6-FCR7 bits. It is cleared
whenever the number of received data bytes in the RX FIFO drops below the trigger level specified by
FCR6-FCR7 bits.
3. The HINT interrupt is asserted whenever the number of received data bytes in the RX FIFO reaches the
trigger level specified by FCR6-FCR7 bits. HINT interrupt is de-asserted when the number of received
data bytes in the RX FIFO drops below the trigger level specified by FCR6-FCR7 bits.
Receiver Character Timeout Interrupts
When the FIFO mode is enabled (FCR0 = 1) and receiver interrupt (Receiver Data Available) is enabled
(IER0 = 1), receiver character timeout interrupt operation is as follows:
1. A Receiver character timeout interrupt code (IIR0-IIR3 = Ch) is set if at least one received character is
in the RX FIFO, the most recent received serial character was longer than four continuous character
times ago (if 2 stop bits are specified, the second stop bit is included in this time period), and the most
recent host read of the RX FIFO was longer than four continuous character times ago.

Transmitter FIFO Interrupt Operation

Transmitter Empty Interrupt
When the FIFO mode is enabled (FCR0 = 1) and transmitter interrupt (TX Buffer Empty) is enabled (IER0
=1), transmitter interrupt operation is as follows:
1. The TX Buffer Empty interrupt code (IIR0-IIR3 = 2h) will occur when the TX Buffer is empty. It is cleared
when the TX Buffer is written to (1 to 16 characters) or the IIR is read.
2. The TX Buffer Empty indications will be delayed 1 character time minus the last stop bit time whenever
the following occur: THRE = 1 and there have not been at least two bytes at the same time in the TX
FIFO Buffer since the last setting of THRE was set. The first transmitter interrupt after setting FCR0 will
be immediate.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 116
PART 3 – Embedded Analog SocketModems Chapter 7 – SocketModem (MT5600SMI and MT5656SMI)

The following table delineates the assigned bit functions for the twelve internal registers. The assigned bit functions are more
fully defined in the following paragraphs.
Internal Registers
Register Register BIT No.
No. Name 7 6 5 4 3 2 1 0
7 Scratch Register
Scratch Register
(SCR)
6 Modem Status Data Ring Data Set Clear to Delta Data Trailing Delta Data Delta Clear
Register (MSR) Carrier Indicator Ready Send Carrier Edge of Ring Set Ready to Send
Detect (RI) (DSR) CTS) Detect Indicator (DDSR) (DCTS)
(DCD) (DDCD) (TERI)
5 Line Status RX FIFO Transmitter Transmitter Break Framing Parity Overrun Receiver
Register (LSR) Error Empty Buffer Interrupt Error Error Error Data
(TEMT) Register (BI) (FE) (PE) (OE) Ready
Empty (DR)
(THRE)
4 Modem Control 0 0 0 Local Out 2 Out 1 Request Data
Register (MCR) Loopback to Send Terminal
(RTS) Ready
(DTR)
3 Line Control Divisor Set Stick Even Parity Number Word Word
Register (LCR) Latch Break Parity Parity Enable of Stop Length Length
Access Bit Select (PEN) Bits Select Select
(DLAB) (EPS) (STB) Bit 1 Bit 0
(WLS1) (WLSO)
2 Interrupt Identify FIFOs FIFOs 0 0 Pending Pending Pending “0” if
Register (IIR) Enabled Enabled Interrupt ID Interrupt ID Interrupt ID Interrupt
(Read Only) Bit 2 Bit 1 Bit 0 Pending
2 FIFO Control Receiver Receiver Reserved Reserved DMA TX FIFO RX FIFO FIFO
Register (FCR) Trigger Trigger Mode Reset Reset Enable
(Write Only) MSB LSB Select
1 Interrupt Enable 0 0 0 0 Enable Enable Enable Enable
(DLAB = 0) Register (IER) Modem Receiver Transmitter Received
Status Line Status Holding Data
Interrupt Interrupt Register Available
(EDSSI) (ELSI) Empty Interrupt
Interrupt (ERBFI)
(ETBEI)
0 Transmitter Buffer Transmitter FIFO Buffer Register (Write Only)
(DLAB = 0) Register
(THR)
0 Receiver Buffer Receiver FIFO Buffer Register (Read Only)
(DLAB = 0) Register (RBR)
1 Divisor Latch MSB Divisor Latch MSB
(DLAB = 1) Register (DLM)
0 Divisor Latch LSB Divisor Latch LSB
(DLAB = 1) Register (DLL)

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 117
PART 3 – Embedded Analog SocketModems Chapter 7 – SocketModem (MT5600SMI and MT5656SMI)

IER – Interrupt Enable Register

(Addr = 1, DLAB = 0)
The IER enables five types of interrupts that can separately assert the HINT output signal (See the Interrupt Sources
and Reset Control table in the IIR section of this chapter). A selected interrupt can be enabled by setting the
corresponding enable bit to a 1, or disabled by setting the corresponding enable bit to a 0. Disabling an interrupt in
the IER prohibits setting the corresponding indication in the IIR and assertion of HINT. Disabling all interrupts
(resetting IER0 – IER3 to a 0) inhibits setting of any Interrupt Identifier Register (IIR) bits and inhibits assertion of the
HINT output. All other system functions operate normally, including the setting of the Line Status Register (LSR) and
the Modem Status Register (MSR).
The IER enables five types of interrupts that can separately assert the HINT output signal. A selected interrupt can be
enabled by setting the corresponding enable bit to a 1, or disabled by setting the corresponding enable bit to a 0.
Disabling an interrupt in the IER prohibits setting the corresponding indication in the IIR and assertion of HINT.
Disabling all interrupts (resetting IER0 - IER3 to a 0) inhibits setting of any Interrupt Identifier Register (IIR) bits and
inhibits assertion of the HINT output. All other system functions operate normally, including the setting of the Line
Status Register (LSR) and the Modem Status Register (MSR).
Bits 7-4 Not used.
Always 0.
Bit 3 Enable Modem Status Interrupt (EDSSI).
This bit, when a 1, enables assertion of the HINT output whenever the Delta CTS (MSR0), Delta DSR
(MSR1), Delta TER (MSR2), or Delta DCD (MSR3) bit in the Modem Status Register (MSR) is a 1. This
bit, when a 0, disables assertion of HINT due to setting of any of these four MSR bits.
Bit 2 Enable Receiver Line Status Interrupt (ELSI).
This bit, when a 1, enables assertion of the HINT output whenever the Overrun Error (LSR1), Parity
Error (LSR2), Framing Error (LSR3), or Break Interrupt (LSR4) receiver status bit in the Line Status
Register (LSR) changes state. This bit, when a 0, disables assertion of HINT due to change of the
receiver LSR bits 1-4.
Bit 1 Enable Transmitter Holding Register Empty Interrupt (ETBEI).
This bit, when a 1, enables assertion of the HINT output when the Transmitter Empty bit in the Line
Status Register (LSR5) is a 1.This bit, when a 0, disables assertion of HINT due to LSR5.
Bit 0 Enable Receiver Data Available Interrupt (ERBFI) and Character Timeout in FIFO Mode.
This bit, when a 1, enables assertion of the HINT output when the Receiver Data Ready bit in the Line
Status Register (LSR0) is a1 or character timeout occurs in the FIFO mode. This bit, when a 0, disables
assertion of HINT due to the LSR0 or character timeout.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 118
PART 3 – Embedded Analog SocketModems Chapter 7 – SocketModem (MT5600SMI and MT5656SMI)

FCR – FIFO Control Register

(Addr = 2, Write Only)
The FCR is a write-only register used to enable FIFO mode, clear the RX FIFO and TX FIFO, enable DMA mode,
and set the RX FIFO trigger level.
Bits 7-6 RX FIFO Trigger Level
FCR7 and FCR6 set the trigger level for the RX FIFO (Receiver Data Available) interrupt.
FCR7 FCR6 RX FIFO Trigger Level (Bytes)
0 0 01
0 1 04
1 0 08
1 1 14

Bits 5, 4 Not used

Bit 3 DMA Mode Select
When FIFO mode is selected (FCR0 = 1), FCR3 selects non-DMA operation (FCR3 = 0) or DMA
operation (FCR3 = 1). When FIFO mode is not selected (FCR0 = 0), this bit is not used (the
modem operates in non-DMA mode in 16450 operation).
DMA Operation in FIFO Mode
RXRDY will be asserted with the number of characters in the RX FIFO us equal to or greater
than the value in the RX FIFO Trigger Level (IIR0-IIR3 = 4h) or the received character
timeout (IIRO-IIR3 = Ch) has occurred. RXTDY will go inactive when there are no more
characters in the RX FIFO.
TXRDY will be asserted when there are one or more empty (unfilled) locations in the TX
FIFO. TXRDY will go inactive when the TX FIFO is completely full.
Non-DMA Operation in FIFO Mode
RXRDY will be asserted when there are one or more characters in the RX FIFO. RXRDY
will go inactive when there are no more characters in the RX FIFO.
TXRDY will be asserted when there are no characters in the TX FIFO. TXRDY will go
inactive when the character is loaded into the TX FIFO Buffer.
Bit 2 TX FIFO Reset
When FCR2 is a 1, all bytes in the TX FIFO are cleared. This bit is cleared automatically by the
modem.
Bit 1 RX FIFO Reset
When FCR1 is a 1, all bytes in the RX FIFO are cleared. This bit is cleared automatically by the
modem.
Bit 0 FIFO Enable
When FCR0 is a 0, 16450 mode is selected and all bits are cleared in both FIFOs. When FCR0
is a 1, FIFO mode (16550A) is selected and both FIFOs are enabled. FCR0 must be a 1 when
other bits in the FCR are written or they will not be acted upon.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 119
PART 3 – Embedded Analog SocketModems Chapter 7 – SocketModem (MT5600SMI and MT5656SMI)

IIR – Interrupt Identifier Register

(Addr = 2)
The Interrupt Identifier Register (IIR) identifies the existence and type of up to five prioritized pending interrupts.
Four priority levels are set to assist interrupt processing in the host. The four levels, in order of decreasing priority,
are Highest: Receiver Line Status, 2: Receiver Data Available or Receiver Character Timeout. 3: TX Buffer Empty,
and 4: Modem Status.
When the IIR is accessed, the modem freezes all interrupts and indicates the highest priority interrupt pending to
the host. Any change occurring in interrupt conditions are not indicated until this access is complete.

Bits 7-6 FIFO Mode

These two bits copy FCR0.
Bits 5-4 Not Used
Always 0.
Bits 3-1 Highest Priority Pending Interrupt
These three bits identify the highest priority pending interrupt (Table below). Bit 3 is
applicable only when FIFO mode is selected; otherwise, bit 3 is a 0.
Bit 0 Interrupt Pending
When this bit is a 0, an interrupt is pending; IIR bits 1-3 can be used to determine the source
of the interrupt. When this bit is a 1, an interrupt is not pending

Interrupt Sources and Reset Control Table

Interrupt Identification Register Interrupt Set and Reset Functions
Bit 3 Bit 2 Bit 1 Bit 0 Priority Interrupt Type Interrupt Source Interrupt Reset
(Note 1) Level Control
0 0 0 1 — None None —
0 1 1 0 Highest Receiver Line Overrun Error (OE) Reading the LSR
Status (LSR1),
Parity Error (PE)
(LSR2),
Framing Error (FE)
(LSR3),
or Break Interrupt
(BI) (LSR4)
0 1 0 0 2 Received Data Received Data Reading the RX
Available Available Buffer or the RX
(LSR0) FIFO drops below
or RX FIFO Trigger the Trigger Level
Level (FCR6-
FCR7)
Reached1
1 1 0 0 2 Character Timeout The RX FIFO Reading the RX
Indication1 contains at least 1 Buffer
character and no
characters have
been removed from
or input to the RX
FIFO during the
last 4 character
times.
0 0 1 0 3 TX Buffer Empty TX Buffer Empty Reading the IIR or
writing to the TX
Buffer
0 0 0 0 4 Modem Status Delta CTS (DCTS) Reading the MSR
(MSR0),
Delta DSR (DDST)
(MSR1),
Trailing Edge Ring
Indicator (TERI)
(MSR3), or Delta
DCD (DCD)
(MSR4)
Note: 1. FIFO Mode only.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 120
PART 3 – Embedded Analog SocketModems Chapter 7 – SocketModem (MT5600SMI and MT5656SMI)

LCR – Line Control Register

(Addr = 3)
The Line Control Register (LCR) specifies the format of the asynchronous data communications exchange.

Bit 7 Divisor Latch Access Bit (DLAB)

This bit must be set to a 1 to access the Divisor Latch Registers during a read or write operation.
It must be reset to a 0 to access the Receiver Buffer, the Transmitter Buffer, or the Interrupt
Enable Register.

Bit 6 Set Break

When bit 6 is a 1, the Transmit data is forced to the break condition, i.e., space (0) is sent. When
bit 6 is a 0, break is not sent. The Set Break bit acts only on the Transmit data and has no effect
on the serial in logic.

Bit 5 Stick Parity

When Parity is enabled (LCR3 = 1) and stick parity is selected (LCR5 = 1), the parity bit is
transmitted and checked by the receiver as a 0 if even parity is selected (LCR4 – 1) or a 1 if odd
parity is selected (LCR4 = 0). When the stick parity is not selected (LCR3 = 0), parity is transmit
and checked as determined by the LCR3 and LCR4 bits.

Bit 4 Even Parity Select (EPS)

When parity is enabled (LCR3 = 1) and stick parity is not selected (LCR5 = 0), the number of 1s
transmitted or checked by the receiver in the data word bits and parity bit is either even (LCR4 =
1) or odd (LCR4 = 0).

Bit 3 Enable Parity (PEN)

When bit 3 is a 1, a parity bit is generated in the serial out (transmit) data stream and checked in
the serial in (receive) data stream as determined by the LCR4 and LCR5 bits. The parity bit is
located between the last data bit and the first stop bit.

Bit 2 Number of Stop GBITS (STB)

This bit specifies the number of stop bits in each serial out character. If bit 2 is a 0, one stop bit is
generated regardless of word length. If bit 2 is a 1 and 5-bit word length is selected, one and
one-half stop bits are generated. If bit 2 is a 1 and 6-, 7-, or 8-bit word length is selected, two
stop bits are generated. The serial in logic checks the first stop bit only, regardless of the number
of stop bits selected.

Bit 1-0 Word Length Select (WLS0 and WLS1)

These two bits specify the number of bits in each serial in or serial out character. The encoding
of bits 0 and 1 is:
Bit 1 Bit 0 Word Length
0 0 5 Bits (Not supported)
0 1 6 Bits (Not supported)
1 0 7 Bits
1 1 8 Bits

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 121
PART 3 – Embedded Analog SocketModems Chapter 7 – SocketModem (MT5600SMI and MT5656SMI)

MCR – Modem Control Register

(Addr = 4)
The Modem Control Register (MCR) controls the interface with modem or data set.

Bit 7-5 Not used

Always 0

Bit 4 Local Loopback

When this bit is set to a 1, the diagnostic mode is selected and the following occurs:
1. Data written to the Transmit Buffer is looped back to the Receiver Buffer.
2. The DTS (MCR0), RTS (MCR1), Out1 (MCR2), and Out2 (MCR3) modem control register
bits are internally connected to the DSR (MSR5), CTS (MSR4), RI (MSR6), and DCD
(MSR7) modem status register bits, respectively.

Bit 3 Output 2
When this bit is a 1, HINT is enabled. When this bit is a 0, HINT is in the high impedance state.

Bit 2 Output 1
This bit is used in local loopback (see MCR4).

Bit 1 Request to Send (RTS)

This bit controls the Request to Send (RTS) function. When this bit is a 1, RTS is on. When this
bit is a 0, RTS is off.

Bit 0 Data Terminal Ready (DTR)

This bit controls the Data Terminal Ready (DTR) function. When this bit is a 1, DTR is on. When
this bit is a 0, DTR is off.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 122
PART 3 – Embedded Analog SocketModems Chapter 7 – SocketModem (MT5600SMI and MT5656SMI)

LSR – Line Status Register

(Addr = 5)
This 8-bit register provides status information to the host concerning data transfer
Bit 7 RX FIFO Error
In the 16450 mode, this bit is not used and is always 0.
In the FIFO mode, this bit is set if there are one or more characters in the RX FIFO with parity
error, framing error, or break indication detected. This bit is reset to a 0 when the host reads the
LSR and note of the above conditions exist in the RX FIFO.
Bit 6 Transmitter Empty (TEMT)
This bit is set to a 1 whenever the TX Buffer (THR) and equivalent of the Transmitter Shift
Register (TRS) are both empty. It is reset to a 0 whenever either the THR or the equivalent of the
TSR contains a character.
In the FIFO mode, this bit is set to a 1 whenever the TX FIFO and the equivalent of the TSR are
both empty
Bit 5 Transmitter Holding Register Empty (THRE) [TX Buffer Empty]
This bit, when set, indicates that the TX Buffer is empty and the modem can accept a new
character for transmission. In addition, this bit causes the modem to issue an interrupt to the host
when the Transmit Holding Register Empty Interrupt Enable bit (IIR1) is set to 1. The THRE bit is
set to a 1 when a character is transferred from the TX Buffer. The bit is reset to 0 when a byte is
written into the TX Buffer by the host.
In the FIFO mode, this bit is set when the TX FIFO is empty; it is cleared when at least one byte
is in the TX FIFO.
Bit 4 Break Interrupt (BI)
This bit is set to a 1 whenever the received data input is a space (logic 0) for longer than two full
word lengths plus 3 bits. The BI is reset when the host reads the LSR.
Bit 3 Framing Error (FE)
This bit indicates that the received character did not have a valid stop bit. The FE bit is set to a 1
whenever the stop bit following the last data bit or parity bit is detected as a logic o (space). The
FE bit is reset to a 0 when the host reads the LSR.
In the FIFO mode, the error indication is associated with the particular character in the FIFO it
applies to. The FE bit set to a 1 when this character is loaded into the RX Buffer.
Bit 2 Parity Error (PE)
This bit indicates that the received data character in the RX Buffer does not have the correct
even or odd parity, as selected by the Even Parity Select bit (LCR4) and the Stick Parity bit
(LCR5). The PE bit is reset to a 0 when the host reads the LSR.
In the FIFO mode, the error indication is associated with the particular character in the FIFO it
applies to. The PE bit set to a 1 when this character is loaded into the RX Buffer.
Bit 1 Overrun Error (OE)
This bit is set to a 1 whenever received data is loaded into the RX Buffer before the host has
read the previous data from the RX Buffer. The OE is reset to a 0 when the host reads the LSR.
In the FIFO mode, if data continues to fill beyond the trigger level, an overrun condition will occur
only if the RX FIFO is full and the next character has been completely received.
Bit 0 Receiver Data Ready (DR)
This bit is set to a 1 whenever a complete incoming character has been received and transferred
into the RX Buffer. The DR bit is reset to a 0 when the host reads the RX Buffer.
In the FIFO mode, the DR bit is set when the number of received data bytes in the RX FIFO
equals or exceeds the trigger level specified in the FCR0-FCR1.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 123
PART 3 – Embedded Analog SocketModems Chapter 7 – SocketModem (MT5600SMI and MT5656SMI)

MSR – Modem Status Register

(Addr = 6)
The Modem Status Register (MSR) reports current state and change information of the modem. Bits 4-7 supply
current state and bits 0-3 supply change information. The change bits are set to a 1 whenever a control input from
the modem changes state from the last MSR read by the host. Bits 0-3 are reset to 0 when the host reads the MSR
or upon reset.
Whenever bits 0, 1, 2, or 3 are set to a 1, a Modem Status Interrupt (IIR0-IIR3 = 0) is generated.

Bit 7 Data Carrier Detect (DCD)

This bit indicates the logic state of the DCH# (RLSD#) output. If Loopback is selected (MCR4 =
1), this bit reflects the state of the Out2 bit in the MCR (MCR3).
Bit 6 Ring Indicator (RI)
This bit indicates the logic state of the RI# output. If Loopback is selected (MCR4 = 1), this bit
reflects the state of the Out1 bit in the MCR (MCR2).
Bit 5 Data Set Ready (DSR)
This bit indicates the logic state of the DSR# output. If Loopback is selected (MCR4 = 1), this bit
reflects the state of the DTR in the MCR (MCR0).
Bit 4 Clear to Send (CTS)
This bit indicates the logic state of the CTS# output. If Loopback is selected (MCR4 = 1), this bit
reflects the state of the RTS bit in the MCR (MCR1).
Bit 3 Delta Data Carrier Detect (DDCD)
This bit is set to a 1 when the DCD bit changes state since the host last read the MSR.
Bit 2 Trailing Edge of Ring Indicator (TERI)
This bit is set to a 1 when the RI bit changes from a 1 to a 0 state since the host last read the
MSR.
Bit 1 Delta Data Set Ready (DDSR)
This bit is set to a 1 when the DSR bit has changed since the host last read the MSR.
Bit 0 Delta Clear to Send (DCTS)
This bit is set to a 1 when the CTS bit has changed since the MSR the host last read the MSR.

RBX – RX Buffer (Receiver Buffer Register)

(Addr = 0, DLAB = 0)
The RX Buffer (RBR) is a read-only register at location 0 (with DLAB = 0). Bit 0 is the least significant bit of the data
and is the first bit received.

THR – TX Buffer (Transmitter Holding Register)

(Addr = 0, DLAB = 0)
The TX Buffer (THR) is a write-only register at address 0 when DLAB = 0. Bit 0 is the least significant bit and the first
bit sent.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 124
PART 3 – Embedded Analog SocketModems Chapter 7 – SocketModem (MT5600SMI and MT5656SMI)

SCR – Scratch Register

(Addr = 7)
The Scratchpad Register is a read-write register at location 7. This register is not used by the modem and can be
used by the host for temporary storage.

Divisor Registers
(Addr = 0 and 1, DLAB = 1)
The Divisor Latch LS (least significant byte) and Divisor Latch MS (most significant byte) are two read-write
registers at locations 0 and 1 when DLAB = 1, respectively.
The baud rate is selected by loading each divisor latch with the appropriate hex value.
Programmable values corresponding to the desired baud rate are listed in Table on following page.

Divisor Latch (Hex)

MS LS Divisor (Decimal) Baud Rate
06 00 1536 75
04 17 1047 110
03 00 768 150
01 80 384 300
00 C0 192 600
00 60 96 1200
00 30 48 2400
00 18 24 4800
00 0C 12 9600
00 06 6 19200
00 04 4 28800
00 03 3 38400
00 02 2 57600
00 01 1 115600
00 00 NA 230400
Programmable Baud Rates

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 125
PART 3 – Embedded Analog SocketModems Chapter 7 – SocketModem (MT5600SMI and MT5656SMI)

OEM Motherboard
Filtering and Surge Protection Options
See Design Considerations and Recommended Parts in Chapter 1.

Recommended Uses for Filtering Options

 Enhanced Surge Protection with RJ-11 Filtering
Use this option when additional lightning protection may be needed.
 Alternate Common Mode with RJ-11 Filtering
Use this option when your design has common mode emission issues.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 126
PART 3 – Embedded Analog SocketModems Chapter 7 – SocketModem (MT5600SMI and MT5656SMI)

Microphone Input Option

Note: Applies to the MT5656SMI Voice only.

Speaker Output Option 1

Speaker Output Option 2

Specifications for the Microphone Input

Impedance >70K ohms
AC Input Voltage Range 1.1V P-P
Reference Voltage 1.35V
Specifications for the Speaker Output from the Codec
Minimum Load 300 
Maximum Capacitive Load 0.01 uF
Output Impedance 10 
AC Output Voltage Range 1.4V P-P
Reference voltage +1.35 VDC
DC Offset Voltage  20 mV
Speaker Output
The speaker output from the codec is coupled to the speaker pin (64) through a 1uF cap and a 33 ohm resistor.
The speaker pin is shared with the call progress monitor which is a digital I/O pin on the DSP that is coupled to
the speaker pin through a 1uF and 3.9K.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 127
PART 3 – Embedded Analog SocketModems Chapter 8 – SocketModem IP (MT5656SMI-IP)

The SocketModem IP embedded modem creates Internet-ready devices by integrating modem functionality and a complete
TCP/IP protocol stack into a single, universal socket design.
The space efficient (1” x 2.5”), ready-to-integrate embedded modem sends and receives data via e-mail, HTTP, or socket
interfaces.
The SocketModem IP embedded modem brings Internet connectivity to any device without adding development time and
costs. It also complies with telecom requirements globally allowing for worldwide shipments.

Product Description Region Order this

Product

MT5656SMI-IP-92 V.92/56K SocketModem with IP – 5V Global
MT5656SMI-IP-L-92 V.92/56K SocketModem with IP – 3.3V Global
Telecom Label
MT5656SMI-LS MT5656SMI-Global Regulatory Label Global
Developer Kit
MTSMI-UDK Universal Developer Kit Global
How to Read the Product Codes in the Table Above:
92 V.92/56K
IP TCP/IP Protocol Stack
L 3.3 Volt
LS Telecom Label
UDK Universal Developer Kit
Other Product Codes:
The complete product code may end in .Rx. For example, MT5656SMI-IP-L-92.Rx.
“R” indicates product revision. “x” is the revision number.

Product Reference Guides Title and Document Fax Commands Voice Commands
Product Number
SocketModem MT5656SMI-IP AT Commands Reference Guide NA Included in S000364x
(MT5656SMI-IP) (S000364x)

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 128
PART 3 – Embedded Analog SocketModems Chapter 8 – SocketModem IP (MT5656SMI-IP)

The SocketModem IP (MT5656SMI-IP) meets the following specifications:

Category Description

Data Standards V.92, V.34, V.32, V.32bis, V.22

Data Format Serial, asynchronous
Character Format 10 bit
Serial/Data Speeds Supports DTE speeds up to 230.4K bps
Client-to-Client Data 33,600, 31,200, 28,800, 26,400, 24,000, 21,600, 19,200, 16,800 bps
Rates 14,400, 12,000, 9600, 7200, 4800 bps
2400, 1200, 0-300 bps
Data Error Correction V.42 (LAP-M or MNP 2–4)
Data Compression V.44, V.42bis
Modes of Operation Full duplex over dial-up lines; data mode, command mode, online command mode
Weight 0.6 oz. (0.017 kg.)
Operating Temperature 0° to +70° C ambient under closed conditions
Storage Temperature -40° to +85° C
Humidity 20% to 90% (non-condensing)
Operating Voltage Typical: 3.3VDC ± 10%; Absolute Maximum Supply Voltage: 3.6VDC
5VDC ± 10%; Absolute Maximum Supply Voltage: 5.25VDC
Power Consumption Typical: 140mA (.462W @ 3.3VDC & 5VDC)
Maximum: 150mA (.495W @ 3.3VDC & 5VDC)
Note: Multi-Tech Systems, Inc. recommends that the customer incorporate a 10% buffer
into their power source when determining product load.
Transmit Level -12 dBm (varies by country)
Receiver Sensitivity -43 dBm
DAA Isolation 1.5Kv r.m.s. or 2121 VDC at working voltage of 250VAC
Command Buffer 50 characters
Telephony/TAM TAM (Telephone Answering Machine)
In modem (transparent) mode
V.253 commands: V.253
2-bit and 4-bit ADPCM, 8-bit linear PCM, and 4-bit IMA coding
8 kHz sample rate
Concurrent DTMF, ring, and "Bell Core Type 1" Caller ID
Certifications & Safety Certifications
Approvals UL 60950
cUL 60950
EN 60950
AS/NZS 60950:2000
CCC
EMC Approvals
FCC Part 15 (Class B)
Canadian (Class B)
EN 55022 (Class B)
EN 55024
GB4943, GB9254
Warranty 2 years

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 129
PART 3 – Embedded Analog SocketModems Chapter 8 – SocketModem IP (MT5656SMI-IP)

Category Description
Intelligent Features AT Commands for configuration
autodial, redial
pulse or tone dial
dial pauses
auto answer
adaptive line probing
automatic symbol and carrier frequency during start-up, retrain, and rate
renegotiations
DTMF detection
call status display
auto-parity and data rate selections
Speaker interface for user-supplied call progress monitoring
"Bell Core Type 1" Caller ID
Internet Protocols Supported: Dial-in PPP, DNS, FTP, ICMP,IP, LCP, PPP, SMTP,
SNTP, TCP, UDP Socket
Dial-in PPP using remote dial-up networking
Authentication Protocols: CHAP, Dial-up Script, PAP
Binary Base 64 encoding and MIME email formats
Modem mode bypasses the IP features
Flash memory to update firmware with the latest enhancements

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 130
PART 3 – Embedded Analog SocketModems Chapter 8 – SocketModem IP (MT5656SMI-IP)

The SocketModem IP uses a 20-pin interface to provide an on-board DAA with tip and ring connections, audio circuit
for call-progress monitoring and serial interface via logic level signals.

Note: 5-Volt Tolerant Signal Inputs are –DTR –TXD, –RTS and –RESET.

Drawing Note: The bolded, shaded pins are the active SocketModem IP pins.

Top View
SocketModem IP Pin Out

For pin descriptions, see the Universal Pin Out Descriptions in Chapter 1.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 131
PART 3 – Embedded Analog SocketModems Chapter 8 – SocketModem IP (MT5656SMI-IP)

3.3VDC Characteristics (VDD = 3.3V ± 0.3V) VDDMAX = 3.6V and

5VDC Characteristics (VDD = 5V ± 0.25V) VDDMAX = 5.25V
Digital Inputs Input High Input Low
–DTR (40), –TXD (35), –RTS (33) Min 2.0V Max 0.8V
Note: These digital inputs are 5V tolerant
Digital Inputs Input High Input Low
–RESET (24) Min 2.0V Max 0.8V
Note: These digital inputs are 5V tolerant
Digital Outputs Output High Output Low Current Drive
–DCD (39), –CTS (38), –DSR (37), –RI (36), –RXD (34) Min. 2.3V Max 0.4V 2mA
Digital Input Capacitance 5 pF

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 132
PART 3 – Embedded Analog SocketModems Chapter 8 – SocketModem IP (MT5656SMI-IP)

OEM Motherboard
Filtering and Surge Protection

See Design Considerations and Recommended Parts in Chapter 1.

Recommended Uses for Filtering Options

 Enhanced Surge Protection with RJ-11 Filtering
Use this option when additional lightning protection may be needed.
 Alternate Common Mode with RJ-11 Filtering
Use this option when your design has common mode emission issues.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 133
PART 3 – Embedded Analog SocketModems Chapter 9 – SocketModem (MT2492SMI)

The Multi-Tech SocketModem MT2492SMI-xx utilizes the LSI CVxx Controller Based Modem Devices and the LSI CSP104
Silicon Direct Access Arrangement (DAA) to form a 2-chip complete embedded modem. This solution includes a DSP data
pump, modem controller, on-chip RAM and ROM, codec, DAA, analog output, and 24.576 MHz clock input.
The modem accepts standard modem AT commands and provides connect rates up to 56 Kbps full-duplex over the Public
Switched Telephone Network (PSTN) and features a complete set of modem protocols including all ITU-T standard formats up
to V.92.
To provide the most flexibility, the CVxx modem system-side device provides numerous additional features for embedded
modem applications. It includes call progress monitoring through standard result codes, error correction, data compression,
autobaud, and fast connect modes. In addition, because the CVxx modem integrates the DAA, analog features (such as line-in
use and over current detection) are included.
This device is ideal for embedded modem applications due to its simple host interface, small board space, and low power
consumption.

Product Description Region Order this Product


MT2492SMI-92 V.92 Serial Data 5V Regional
MT2492SMI-34 V.34 Serial Data 5V Regional
MT2492SMI-22 V.22bis Serial Data 5V Regional
MT2492SMI-L-92 V.92 Serial Data 3.3V Regional
MT2492SMI-L-34 V.34 Serial Data 3.3V Regional
MT2492SMI-L-22 V.22bis Serial Data 3.3V Regional
Telecom Label
MT2492SMI-LS MT2492SMI-Regulatory Label Regional
Developer Kit
MTSMI-UDK Universal Developer Kit Regional

How to Read the Product Codes in the Table Above:

92 V.92/56K data rate
34 V.34/33.6K data rate
22 V.22bis data rate
L 3.3 Volt Build
LS Telecom Label
UDK Universal Developer Kit
Other Product Codes:
The complete product code may end in .Rx. For example, MT2492SMI-92.Rx.
“R” indicates product revision. “x” is the revision number.

Product Reference Guides Title and Document Fax Commands Voice Commands
Product Number
SocketModem SocketModem MT2492SMI AT Commands NA NA
(MT2492SMI) Reference Guide (S000435x)

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 134
PART 3 – Embedded Analog SocketModems Chapter 9 – SocketModem (MT2492SMI)

The SocketModem (MT2492SMI) meets the following specifications:

Category Description
Data Standards V.92, V.90, V.34, V.29, V.22bis, V.22, V.23, V.21; Bell 212A & Bell 103
Data Format Serial, asynchronous
Character Format 10 bit
Serial/Data Speeds Serial port data rates adjustable to 300, 1200, 2400, 4800, 9600, 19,200,
38,400, 57,600, and 115,200
Client-to-Client Data Rates 33,600, 31,200, 28,800, 26,400, 24,000, 21,600, 19,200, 16,800 bps
14,400, 12,000, 9600, 7200, 4800 bps
2400, 1200, 0-300 bps
Data Error Correction V.42 (LAP-M or MNP 2–4)
Data Compression V.42bis, MNP 5
Modes of Operation Full duplex over dial-up lines; data mode, command mode, and online command
mode
Weight 0.6 oz. (0.017 kg.)
Operating Temperature 0 to +70° C
Storage Temperature -10° to +85° C
Humidity 20% to 90% (non-condensing)
Operating Voltage Typical: 3.3VDC ± 5%; Absolute Maximum Supply Voltage: 3.6VDC
Typical: 5VDC ± 5%; Absolute Maximum Supply Voltage: 5.25VDC
Power Requirements 3.3 Volt: Typical: 86mA (.283W @ 3.3VDC)
Maximum: 96mA (.345W @ 3.6VDC)
5 Volt: Typical: 88.5mA (.442W @ 5VDC)
Maximum: 94.8mA (.498W @ 5.25VDC)
Note: Multi-Tech Systems, Inc. recommends that the customer incorporate a
10% buffer into their power source when determining product load.
Transmit Sensitivity -12 dBm (varies by country)
Receiver Sensitivity -40 dBm (-43 dBm under worst case conditions)
DAA Isolation 1.5Kv r.m.s. or 2121 VDC at working voltage of 250VAC
Flow Control XON/XOFF (software), RTS/CTS (hardware)
Command Buffer 50 characters
Certifications & Approvals Safety Certifications
UL/cUL 60950-1
EN 60950-1
AS/NZS 60950:2000
CCC
EMC Approvals
FCC Part 15 (Class B)
Canadian EMC (Class B)
EN 55022 (Class B)
EN 55024
Warranty 2 years
Intelligent Features TIA-602 AT command compatible
AT command set support
Supports V.80
Line polarity reversal detection
Line current loss detection
Line-in-use detection during on-hook operation
Extension pickup detection
"Bell Core Type 1" Caller ID
Autodial, redial
Pulse or tone dial
Auto answer

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 135
PART 3 – Embedded Analog SocketModems Chapter 9 – SocketModem (MT2492SMI)

The MT2492SMI SocketModem with a serial interface provides an on-board DAA with tip and ring connections, audio
circuit for call-progress monitoring and serial interface via logic level signals.
Note: The bolded, shaded pins are active MT2492MI pins.

Top View
Serial SocketModem Pin Out
For pin descriptions, see the Universal Pin Out Description in Chapter 1.

3.3V Serial SocketModem

3.3VDC Characteristics (VDD = 3.3V ± 0.3V) VDDMAX = 3.6V
Inputs Input High Input Low
–DTR (40), –TXD (35), –RTS (33), –RESET (24) Min 2.0V Max 0.8V
Outputs Output High Output Low
–DCD (39), –CTS (38), –DSR (37), –RI (36), –RXD (34) Min 2.4V Max 0.4V
2mA, Z INT = 120 Ω
Digital Input Capacitance 50pF

5V Serial SocketModem
5VDC Characteristics (VDD = 5V ± 0.25V) VDDMAX = 5.25V
Inputs Input High Input Low
–DTR (40), –TXD (35), –RTS (33), –RESET (24) Min 2.0V Max 0.8V
Outputs Output High Output Low
–DCD (39), –CTS (38), –DSR (37), –RI (36), –RXD (34) Min 2.4V Max 0.4V
2mA, Z INT = 120 Ω
Digital Input Capacitance 50pF

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 136
PART 3 – Embedded Analog SocketModems Chapter 9 – SocketModem (MT2492SMI)

OEM Motherboard
Filtering and Surge Protection

See Design Considerations and Recommended Parts in Chapter 1.

Recommended Uses for Filtering Options

 Enhanced Surge Protection with RJ-11 Filtering
Use this option when additional lightning protection may be needed.
 Alternate Common Mode with RJ-11 Filtering
Use this option when your design has common mode emission issues.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 137
PART 3 – Embedded Analog SocketModems Chapter 10 – SocketModem (MT2456SMI-22)

The Multi-Tech SocketModem supports analog data modem operation with V.22bis Fast Connect, V.42bis data compression,
and V.80 synchronous access mode. The SocketModem is a space-efficient (1" × 2.5"), embedded modem that is ready-to-
integrate into your applications; therefore, dramatically reducing development time and costs for system designers.
The MT2456SMI-22 SocketModem is a standard 20-pin modem used for integrating data communications. It is a single-port 5V
or 3.3V modem that integrates a modem controller, DSP, and DAA in a 1" x 2.5" form factor and communicates to a host
controller via an asynchronous serial interface.

Product Description Region Order this

Product

MT2456SMI-22 V.22bis Serial Data 5V Global
MT2456SMI-L-22 V.22bis Serial Data 3.3V Global
Telecom Label
MT2456SMI-LS MT2456SMI-Global Regulatory Label Global
Developer Kit
MTSMI-UDK Universal Developer Kit Global

How to Read the Product Codes in the Table Above:

22 V.22bis
L 3.3 Volt Build
LS Telecom Label
UDK Universal Developer Kit
Other Product Codes:
The complete product code may end in .Rx. For example, MT2456SMI-22.Rx.
“R” indicates product revision. “x” is the revision number.

Product Reference Guides Title and Document Fax Commands Voice Commands
Product Number
SocketModem MT2456SMI-22 AT Commands Reference Guide NA NA
(MT2456SMI-22) (S000281x)

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 138
PART 3 – Embedded Analog SocketModems Chapter 10 – SocketModem (MT2456SMI-22)

The SocketModem (MT2456SMI-22) meets the following specifications:

Category Description
Data Standards V.22bis, V.22; Bell 212A and 103
Data Format Serial, asynchronous
Character Format 10 bit
Serial/Data Speeds Serial port data rates adjustable to 300, 1200, 2400, 4800, 9600, 19,200,
38,400, 57,600, and 115,200
Client-to-Client Data Rates 2400, 1200, 0-300 bps
Data Error Correction V.42 (LAP-M or MNP 2–4)
Data Compression V.42bis
Modes of Operation Full duplex over dial-up lines; data mode, command mode, and online command
mode
Weight 0.6 oz. (0.017 kg.)
Operating Temperature 0 to +70° C
Storage Temperature -40° to +85° C
Humidity 20% to 90% (non-condensing)
Operating Voltage Typical: 3.3 V DC ± 5%; Absolute Maximum Supply Voltage: 3.6 V DC
Typical: 5 V DC ± 5%; Absolute Maximum Supply Voltage: 5.5 V DC
Power Consumption Source Voltage Maximum Idle Typical
3.3VDC 64mA 59.6mA 62mA
5VDC 68mA 60ma 61mA
Transmit Sensitivity -12 dBm (varies by country)
Receiver Sensitivity -43 dBm
DAA Isolation 1.5Kv r.m.s. or 2121 VDC at working voltage of 250VAC
Flow Control XON/XOFF (software), RTS/CTS (hardware)
Command Buffer 50 characters
Warranty 2 years
Intelligent Features AT command compatible
V.22bis fast connect
Supports V.80
Supports Fast POS 9600
Line polarity reversal detection
Line current loss detection
Line-in-use detection
Extension pickup detection
Remote hang-up detection
Call waiting detection
"Bell Core Type 1" Caller ID
Autodial, redial
Pulse or tone dial
Auto answer
Call status display

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 139
PART 3 – Embedded Analog SocketModems Chapter 10 – SocketModem (MT2456SMI-22)

The MT2456SMI-22 SocketModem with a serial interface uses a 20-pin interface to provide an on-board DAA with tip and
ring connections, audio circuit for call-progress monitoring and serial interface via logic level signals.
Note: The bolded, shaded pins are active MT2456SMI-22 pins.

Top View
Serial SocketModem Pinout

For pin descriptions, see the Universal Pinout Descriptions in Chapter 1.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 140
PART 3 – Embedded Analog SocketModems Chapter 10 – SocketModem (MT2456SMI-22)

3.3VDC Characteristics (VDD = 3.3V ± 0.3V) VDDMAX = 3.6V

Inputs Input High Input Low
–DTR (40), –TXD (35), –RTS (33), –RESET (24) Min 2.0V Max 0.8V
Outputs Output High Output Low
–DCD (39), –CTS (38), –DSR (37), –RI (36), –RXD (34) Min 2.4V Max 0.4V
2mA, Z INT = 120 Ω
Digital Input Capacitance 50pF

5VDC Characteristics (VDD = 5V ± 0.25V) VDDMAX = 5.25V

Inputs Input High Input Low
–DTR (40), –TXD (35), –RTS (33), –RESET (24) Min 2.0V Max 0.8V
Outputs Output High Output Low
–DCD (39), –CTS (38), –DSR (37), –RI (36), –RXD (34) Min 2.4V Max 0.4V
2mA, Z INT = 120 Ω
Digital Input Capacitance 50pF

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 141
PART 3 – Embedded Analog SocketModems Chapter 10 – SocketModem (MT2456SMI-22)

OEM Motherboard
Filtering and Surge Protection Options

See Design Considerations and Recommended Parts in Chapter 1.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 142
 Part 4
Embedded Device Servers
PART 4 – Embedded Device Servers Chapter 11 – SocketEthernet IP (MT100SEM-IP)

The SocketEthernet IP (MT100SEM-IP) device server connects serial devices to an IP network for remote monitoring, control
and configuration. The space efficient communications device (1” x 2.5”) integrates Multi-Tech's Universal IP™ protocol stack
and a serial-to-Ethernet interface into a single, universal socket design. The SocketEthernet IP can make your existing and
next generation device, machine or system, IP-ready while you focus on developing its core features.

Product Description Region Order this

Product

MT100SEM-IP
MT100SEM-IP Embedded Serial-to-Ethernet Device Server with Universal IP™ – 5V Global
MT100SEM-L-IP Embedded Serial-to-Ethernet Device Server with Universal IP™ – 3.3V Global
MT100SEM-L-HV-IP Embedded Serial-to-Ethernet Device Server with High Voltage Global
Dielectric Isolation (EN60601) and Universal IP™ – 5V
Developer Kit
MTSMI-UDK Universal Developer Kit Global

How to Read the Product Codes in the Table Above:

IP Universal IP™ Stack
L 3.3 Volt
HV High Voltage Dielectric Isolation (EN60601)
UDK Universal Developer Kit
Other Product Codes:
The complete product code may end in .Rx. For example, MT100SEM-L-IP.Rx
“R” indicates product revision. “x” is the revision number.

Product Reference Guides Title and Document Product Fax Commands Voice Commands
Number
Serial-to-Serial Device Multi-Tech Universal IP AT Commands (S000426x) NA NA
Server
(MT100SEM-IP)

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 144
PART 4 – Embedded Device Servers Chapter 11 – SocketEthernet IP (MT100SEM-IP)

The SocketEthernet IP (MTSEM-IP) meets the following specifications:

Category Description
Interfaces 10/100BaseT Ethernet, Asynchronous Serial
Serial Character Format 8N1 (Data, Parity, and Stop bits are configurable)
Serial/Data Speeds 300 to 921600 bps
Ethernet Data Speeds 10MB or 100MB
Physical Description 2.541" L × 1.045" W × 0.680" H; 0.6 oz.
(6.45 cm × 2.65 cm × 1.7 cm; 0.017 kg.)
Operating Temperature 0 to +70 C
Storage Temperature -40 C to +85 C
Humidity 20% to 90% (non-condensing)
Operating Voltage 5VDC or 3.3VDC
Power Measurements See the Power Measurements table.
Flow Control RTS/CTS (hardware)
Network Protocols ARP, DHCP client, DNS client, FTP, ICMP (ping), IP, POP3, SMTP, TCP, Telnet
Supported server, UDP
Management Serial
Telnet
Web-based configuration
Certifications & Safety Certifications
Approvals UL 60950
cUL 60950
EN 60950
AS/NZS 60950:2000
Safety Certifications for High Voltage Build
UL 60601-1
EN 60601-1
EMC Approvals
FCC Part 15 Class B
Canada Class B
EN 55022 Class B
EN 55024
Warranty 2 years
Intelligent Features Complete serial-to-Ethernet connectivity solution including network processor,
media access controller and physical interface.
AT Command compatible
LED driver outputs for visual monitoring speed, link, activity, collision and duplex
mode
Half duplex or full duplex support on the LAN interface
Central site setup and control of the remote communications device.
Flash memory to update firmware with the latest enhancements

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 145
PART 4 – Embedded Device Servers Chapter 11 – SocketEthernet IP (MT100SEM-IP)

The SocketEthernet IP uses a 22-pin interface to provide an on-board Ethernet media access controller, an Ethernet
physical layer (without the RJ-45 jack), an LED driver for Ethernet monitoring, and a serial interface.
Note: The shaded, bolded pins are SocketEthernet IP active pins.

Top View
SocketEthernet IP MT100SEM-IP Pin Out

For pin descriptions, see the Universal Pin Out Descriptions in Chapter 1.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 146
PART 4 – Embedded Device Servers Chapter 11 – SocketEthernet IP (MT100SEM-IP)

3.3V Serial
3.3VDC Characteristics (VDD = 3.3V ± 0.3V) VDDMAX = 3.6V
Parameter Minimum Maximum
Input Low Level -0.3V 0.8V
–DTR (40), –TXD (35), –RTS (33), –RESET (24)
Note: These inputs are 5 volt tolerant
Input High Level Min 2.52V VDD
–DTR (40), –TXD (35), –RTS (33), –RESET (24)
Note: These inputs are 5 volt tolerant
Output Low Level NA 0.4V Current Drive
–DCD (39), –CTS (38), –DSR (37), –RI (36), –RXD (34) 2mA

Output High Level Min. 2.3V NA Current Drive

–DCD (39), –CTS (38), –DSR (37), –RI (36), –RXD (34) 2mA

Digital Input Capacitance – 5 pF

5V Serial
5VDC Characteristics (VDD = 5V ± 0.25V) VDDMAX = 5.25V
Parameter Minimum Maximum
Input Low Level -0.3V 0.8V
–DTR (40), –TXD (35), –RTS (33), –RESET (24)

Input High Level 2.52V VDD

–DTR (40), –TXD (35), –RTS (33), –RESET (24)

Output Low Level NA 0.4V Current Drive

–DCD (39), –CTS (38), –DSR (37), –RI (36), –RXD (34) 2mA

Output High Level 2.3V NA Current Drive

–DCD (39), –CTS (38), –DSR (37), –RI (36), –RXD (34) 2mA

Digital Input Capacitance – 5 pF

MT100SEM-IP Measured Power at Input Voltage 5.00

Sleep Typical Maximum

Current (AMPS) 0.187 0.187 0.194
Watts 0.935 0.935 .97

MT100SEM-IP Measured Power at Input Voltage 3.3

Sleep Typical Maximum

Current (AMPS) NA 0.137 0.168
Watts NA 0.411 0.504

* Multi-Tech Systems, Inc. recommends that the customer incorporate a 10% buffer into their power source when
determining product load.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 147
PART 4 – Embedded Device Servers Chapter 11 – SocketEthernet IP (MT100SEM-IP)

Note: VREF stands for Power in this drawing.

Isolated Design Application Note

The MT100SEM-L-HV-IP was designed to meet Basic Isolation at 240Vac according to the international medical
directive for safety (EN60601-1). The recommended components for an isolated design comply with the same
standard.

Recommended Capacitors for a Non-Isolated Design:

Manufacturer – NIC Components Corp.
Part Number – NMC0603NPO150J50TRPF
Recommended Safety Rated Capacitors for an Isolated Design: The recommended capacitors are Y2 rated and
meet supplementary isolation at 240Vac along with the required creepages and clearances.
Manufacture – NOVACAP
Part Number – ES2211N(value)K502NXT
Recommended Resistor: The resistors are 75 ohms 1/8 watt.
Recommended Ethernet Modular Jack: The recommended jack is an eight contact, eight position, unshielded
and ungrounded connector that will maintain the need isolation and spacing requirements. A shielded and
grounded connector may be used, but special consideration must be made for the isolation and spacing
requirements.
Manufacture – Stewart Connector Systems
Part Number – SS-6488-NF-K1
Note: These SocketEthernet parts are RoHS compliant.
Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 148
PART 4 – Embedded Device Servers Chapter 11 – SocketEthernet IP (MT100SEM-IP)

The Auto-Discovery Manager is a mechanism for remotely monitoring the Universal IP functioning. It also provides
support for configuring several key parameters, such as DHCP Status (enable/disable), IP Address, and the Host
Name of an MT100SEM-IP.
The Auto-Discovery mechanism is utilized by running a Windows-based Server Application that can monitor/configure
the MT100SEM-IP. Communication between the MT100SEM-IP and the Windows-based Server is through MAC
level broadcasts on a configured UDP port.
Two Ways to Use Auto Discovery: Auto-Discovery can be performed by using AT Commands (see the Universal IP
AT Commands Reference Guide – included on the Universal Kit CD) or by using the Auto-Discover Manager
Software (also included on the Universal Kit CD).

Auto-Discovery Manager Software

The Auto-Discovery Manager is composed of two components:
 The Client Component – The Client component periodically broadcasts its current configuration over
the network.
 The Server Component – The Server component receives the broadcasts from the client.

Client Component
The Auto-Discovery Client component is integrated with MT100SEM-IP. It broadcasts its current configuration
over the network on a specific UDP SERVER-PORT. By default the SERVER-PORT is set to 1020. The
configuration parameters broadcast are
 Version details
 MAC Address
 Static IP Address
 DHCP Status
 DHCP Assigned IP Address
 Host Name
 Broadcast interval
 Port number on which the client listens

Server Component
The Server component listens on the SERVER-PORT. It receives the broadcasts from the client and updates the
list of configuration parameters. This list can be viewed by the administrator through the User Interface:

The List of Entries

Detailed Information about a

Selected Entry

Log Files will display here

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 149
PART 4 – Embedded Device Servers Chapter 11 – SocketEthernet IP (MT100SEM-IP)

How to View the Detailed Information

New entries are appended to the list shown on the screen above. Only the first ten entries are displayed on
the screen. However the administrator can scroll down to view more entries. Clicking on an entry displays
the detailed information about that entry.
How to Edit the List and Make the Changes Permanent
1. Double-click on the entry you wish to edit.
2. After clicking the desired entry, a new dialog box displays showing the current configuration.

3. Enter the new parameters and click the SET button. The server sends the modified parameters to the
client.
Upon receiving the broadcast from the Server, the Client validates the packet. The Client determines
whether the packet is destined for its own MAC Address. If so, it sets the modified parameters that are
different from its current configuration, and the it broadcast the newly configured parameters.
The Client Status is set to Active upon the receipt of a broadcast packet.
The Client Status is made Inactive if there is no request from the client for a stipulated period.
(3 * periodic timer value).
How to Set the Parameters to the Previous Configuration
When the RESET button is clicked, the parameters are set to the defaults received. In other words, RESET
is similar to UNDO (it sets the modifications to the previous ones).

Saving the Log

The logs can be saved to a file. They are spooled into the third part of the window in the main dialog box. To save the
log: Select File > Save Log As.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 150
Part 4 – Embedded Device Servers Chapter 12 – SocketWireless Wi-Fi (MT800SWM)

® ®

The SocketWireless Wi-Fi device server connects serial devices to an IP network via 802.11b wireless networking. It enables
you to build wireless networking into virtually any device allowing for remote monitoring, control and configuration. The space
efficient communications device (1” x 2.5”) integrates a complete TCP/IP protocol stack. It can make your existing and next
generation device, machine or system, IP-ready while you focus on developing its core features.

Product Description Region Order this Product


MT800SWM 802.11b Device Server, 5V Regional
MT800SWM-L 802.11b Device Server, 3.3V Regional
Developer Kit
MTSMI-UDK Universal Developer Kit Regional

How to Read the Product Codes in the Table Above:

L 3.3V
UDK Universal Developer Kit

Other Product Codes:

The complete product code may end in .Rx. For example, MT800SWM.Rx
“R” indicates product revision. “x” is the revision number.

Product Reference Guides Title and Document Product Fax Commands Voice Commands
Number
802.11b Device Server SocketWireless Wi-Fi AT Commands Reference NA NA
(MT800SWM) Guide (S000425x)

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 151
Part 4 – Embedded Device Servers Chapter 12 – SocketWireless Wi-Fi (MT800SWM)

The SocketWireless Wi-Fi meets the following specifications:

Category Description
Standard Internet Interface: 802.11b
Frequency Range 2.400 to 2.484 GHz
Data Format Serial, asynchronous, 3.3V
Character Format 8N1
Data Rate Software selectable: 1200 bps to 230K bps
Antenna Connector MMCX
Maximum Transmit Power 16 dBm
Receiver Sensitivity -82 dBm
Weight 0.6 oz. (0.017 kg.)
Power Consumption 3.3 Volt
Inrush current at power-on is 740mA
With active Wi-Fi connection, the current draw is 230mA
5 Volt
Inrush current at power-on is 1.1 amp
With active Wi-Fi connection, the current draw is 247mA
Note: Multi-Tech Systems, Inc. recommends that the customer incorporate a 10%
buffer into their power source when determining product load.
Operating Temperature -30 to +70 C (FCC Certified -20 to +55 C)
Storage Temperature -40 to +85 C
Humidity 20% to 90% (non-condensing)
Operating Voltage 3.3VDC or 5VDC
Certifications & Safety Certifications:
Approvals UL 60950
cUL 60950
EN 60950
AS/NZS 60950:2000
EMC Approvals:
FCC Part 15 Subpart C
Canada RSS-210
EN 300 328
EN 301 489-17
Features Complete serial-to-Wi-Fi wireless connectivity solution including network
processor, media access controller, and air interface
Wi-Fi Security using 64/128 bit WEP
Supports Ad Hoc and Infrastructure Mode
Network Protocols Supported: ARP, DHCP client, FTP client, ICMP (PING), IP,
POP3, SMTP client, TCP, UDP
Configuration and Management via AT Commands
Flash memory to update firmware with the latest enhancements
Warranty Two years

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 152
Part 4 – Embedded Device Servers Chapter 12 – SocketWireless Wi-Fi (MT800SWM)

The SocketWireless Wi-Fi uses a 15-pin interface that provides an 802.11b wireless network connection to provide a
complete serial-to-Wi-Fi connectivity solution.

SocketWireless Wi-Fi Pin Out

For pin descriptions, see the Universal Pin Out Descriptions in Chapter 1.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 153
Part 4 – Embedded Device Servers Chapter 12 – SocketWireless Wi-Fi (MT800SWM)

3.3V Serial
3.3VDC Characteristics (VDD = 3.3V ± 0.3V) VDDMAX = 3.6V
Digital Inputs Input High Input Low
–DTR (40), –TXD (35), –RTS (33), –RESET (24) Min 2.52V Max 0.8V
Digital Outputs Output High Output Low Current Drive
–DCD (39), –CTS (38), –DSR (37), –RI (36), Min. 2.3V Max 0.4V 2mA
–RXD (34)
Digital Input Capacitance 5 pF

5V Serial
5VDC Characteristics (VDD = 5V ± 0.25V) VDDMAX = 5.25V
Digital Inputs Input High Input Low
–DTR (40), –TXD (35), –RTS (33), –RESET (24) Min 2.52V Max .0.8V
Digital Outputs Output High Output Low Current Drive
–DCD (39), –CTS (38), –DSR (37), –RI (36), Min. 2.3V Max 0.4V 2mA
–RXD (34)
Digital Input Capacitance 5 pF

Note: All digital inputs/outputs are 3.3V only.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 154
Part 4 – Embedded Device Servers Chapter 12 – SocketWireless Wi-Fi (MT800SWM)

Radio Characteristics
Frequency 2402 – 2480MHz
Modulation DSSS
Number of Channels 1 to 14
Transmission Rate 1, 2, 5.5, 11Mbps
RF Receive Sensitivity -82dBm typical
RF Transmit Power 16 dBm

Baud Rate = 115200 bps

Data Bits = 8 bits
Parity = None
Stop bits = 1 bit
Hardware Flow Control RTS/CTS = Disabled

Antenna Requirements
Frequency Range 2.4-2.5 GHz
Impedance 50 ohm nominal
VSWR <2.0:1
Gain 5 dBi
Radiation Omni
Polarization Vertical
Connector Reverse Polarity SMA Plug

Antenna Source for Wi-Fi

The antenna can be ordered from the following manufacturer:
Aristotle Enterprises http://www.aristotle.com.tw/
Part Number Description
RFA-02-5-F7M3 2.4 GHz 5dBi Swi-Reverse-F Antenna

Antenna Cable and Connector

See Chapter 1 for Antenna System details. Note that the cable for the Wi-Fi SocketModem has a reverse
polarity SMA plug.

Approved Antenna Cable Parts

GC Protronics 20930C
Samtec ASP-116785-01
Coax Cable RG-178/U

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 155
Part 4 – Embedded Device Servers Chapter 12 – SocketWireless Wi-Fi (MT800SWM)

This section covers how to use the modular transmitter in order to maintain the modular transmitter approval and RF
exposure compliance.

Conditions to Satisfy Modular Transmitter Approval

This device is intended only for use by OEM integrators under the following 3 conditions:
1. The antenna must be installed such that 20 cm is maintained between the antenna and the end
user for all installations.
2. The transmitter module may not be located with any other transmitter or antenna.
3. The communications device is approved using the FCC "unlicensed modular transmitter approval"
method. Therefore, the communication device must only be used with the originally approved
antennas.
As long as the 3 conditions above are met, further transmitter testing will not be required. However, the OEM
integrator is still responsible for testing their end-product for any additional compliance requirements with
this communication device installed (for example, digital device emissions, PC peripheral requirements, etc.)
IMPORTANT NOTE: In the event that any of these conditions CANNOT be met (for example certain laptop
configurations, location with another transmitter, or use of a different type antenna), then the FCC
authorization for the communications device is no longer considered valid and the FCC ID CANNOT be
used on the final product. In these circumstances, the OEM integrator will be responsible for re-evaluating
the end product (including the transmitter) and obtaining a separate FCC authorization.

RF Exposure Statements Developers Must Include in the User Manual for End
Users
The user manual for consumers must include the following information in a prominent location:
IMPORTANT NOTE: To comply with FCC RF safety exposure limits, the antenna used for this transmitter
must be installed to provide a separation distance of at least 20 cm from all persons and must not be located
or operating in conjunction with any other antenna or transmitter.

Regulatory Requirements for End Product Labeling

Suggested End Product Labeling
This transmitter module is authorized only for use in devices where the antenna may be installed in such a
way that 20 cm may be maintained between the antenna and the users (for example access points, routers,
wireless ASDL modems, and similar equipment). The final end product must be labeled in a visible area on
the exterior of the enclosure with the following or similar text: "Contains TX FCC ID: AU792U07B06821".

FCC & IC Information to Consumers

The user manual for the consumer must contain the statements required by the following FCC and IC
regulations: 47 C.F.R. 15.19(a)(3), 15.21, 15.101 and RSS-Gen Issue 2 dated June 2007, Sections 7.1.4
and 7.1.5.

Additional Information That Must Be Provided to OEM Integrators

The end user should NOT be provided any instructions on how to remove or install the modular transmitter.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 156
PART 4 – Embedded Device Servers Chapter 13 – SocketWireless Bluetooth (MTS2BTSMI)

The Multi-Tech Systems, Inc. SocketWireless with Bluetooth-enabled technology allows developers to establish wireless
networks using a special set of AT commands. The SocketWireless with Bluetooth technology makes the cable-replacement
transition to wireless networks seamless and easy.
This chapter explains how to establish Bluetooth communication between two serial devices for data applications in a point-to-
point network. Bluetooth-enabled devices create communication-ready devices by integrating data functionality into a single,
universal socket design. This complete, ready-to-integrate device dramatically reduces development time and costs for system
designers.

Because of the way Bluetooth is designed and operates, random byte gaps of 5 ms to 20 ms are common. Packet size
will vary from transmission to transmission.
Although the serial band frequency operates up to 920K bps, effective data throughput in fast streaming mode is
approximately 200K bps. Effective data throughput in regular data mode is 60K bps. The reason for the slower speed in
regular mode is due to the AT parser, which looks at each character for ASCII valid command scripts in the regular
mode's data stream.
The SocketWireless RX has very limited buffering, so if you do not use hardware flow control and are transmitting
further distances, you will quickly overflow the 50 byte buffer because of RF retransmissions, etc.
When a Bluetooth connection is made, the SocketWireless device goes into regular data mode per the power-up factory
default settings. This enables the user to configure the SocketWireless settings remotely via a remote RF Bluetooth
connection. Basically, you can setup the SocketWireless device so no commands are required to be sent from the
embedded side of the device. This allows seamless interfacing with legacy systems without the need to modify the host
device

Product Description Region Order this Product


MTS2BTSMI Embedded Serial-to-Bluetooth, C1, 5V Global
MTS2BTSMI-L Embedded Serial-to-Bluetooth, C1, 3.3V Global
Developer Kit
MTSMI-UDK Universal Developer Kit Global

How to Read the Product Codes in the Table Above:

C1 Class 1 Bluetooth
L 3.3V
UDK Universal Developer Kit
Other Product Codes:
The complete product code may end in .Rx. For example, MTS2BTSMI-L.R2.
“R” indicates product revision. “x” is the revision number.

Product Reference Guides Title and Document Fax Commands Voice Commands
Product Number
SocketWireless Bluetooth SocketWireless Bluetooth AT Commands NA NA
(MTS2BTSMI) Reference Guide (S000360x)

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 157
PART 4 – Embedded Device Servers Chapter 13 – SocketWireless Bluetooth (MTS2BTSMI)

The SocketWireless Bluetooth (MTS2BTSMI) meets the following specifications:

Category Description
Standard Class 1 Bluetooth V2.0 compliant
Note: For Bluetooth protocol V2.0, the circuit board I/O pin 7 now controls flow control.
In V1.2, circuit board I/O pin 3 controlled flow control. V2.0 now supports multipoint
connections.
Frequency Range 2402 to 2480 MHz (2.402 to 2.480 GHz)
Data Format For Serial Interface - Asynchronous
Serial Speeds Supports speeds from 1200 bps to 920K bps
Flow Control Hardware
Output Level (Class 1) 20dBm maximum
Modes of Operation Inquiry, Idle, Data, Fast Data, Park, Sniff, Command, Master, Slave
Device Profiles Serial Port (SPP), Dial-up Network (DUN)
Buffer Serial 50 bytes
RF 50-byte RX buffer
Weight 0.6 oz. (0.017 kg.)
Power Consumption Idle: 1.5mA @ 3.3VDC 1.6mA @ 5VDC
Master Connected: 6mA @ 3.3VDC 7mA @ 5VDC
Fast Data: 21mA @ 3.3VDC 38mA @ 5VDC
Master Inquiry: 68mA @ 3.3VDC 74mA @ 5VDC
Notes: These power measurements were taken with no LEDs connected.
Driving an LED through 330 ohm resistor to GND draws an
additional 4mA on 5V for each LED.
Note: Multi-Tech Systems, Inc. recommends that the customer incorporate a 10% buffer
into their power source when determining product load.
Operating Temperature -40 to +70 C
Storage Temperature -40 to +85 C
Humidity 20% to 90% (non-condensing)
Operating Voltage 5VDC or 3.3VDC
Minimum and Maximum Voltage: 3.3VDC  0.1V & < 10mVp-p noise
5VDC  0.1V & < 10mVp-p noise
Certifications & Safety Certifications:
Approvals UL 60950
cUL 60950
EN 60950
AS/NZS 60950:2000
EMC Approvals:
FCC Part 15.247:2004 (subpart C)
EN 301 489-1 V1.4.1 (2002-08)
Intelligent Features Can be configured, commanded, and controlled through simple ASCII strings over the
Bluetooth RF link or directly through the hardware serial UART.
Low power consumption.
Secure and robust communication link.
 FHSS (Frequent Hopping Spread Spectrum)
 56-bit encryption, and 10 alphanumeric Personal Identification Number (PIN)
 Error correction schemes for guaranteed packet delivery
Operating System independent
AT command software interface
LED driver outputs for visual monitoring speed, link, activity, collision, and duplex mode.
Auto connect.
Supports multipoint connections.
Warranty Two years

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 158
PART 4 – Embedded Device Servers Chapter 13 – SocketWireless Bluetooth (MTS2BTSMI)

Note: The bolded, shaded pins are the active SocketWireless pins.

Top View – SocketWireless Bluetooth Pin Out

For pin descriptions, see the Universal Pin Out Descriptions in Chapter 1.

5V Serial SocketWireless
5VDC Characteristics (VDD = 5V ± 0.25V) VDDMAX = 5.25V
Inputs Input High Input Low
–DTR (40), –TXD (35), –RTS (33) Min 2.0V Max 0.8V
–RESET (24) Min 2.0V Max 0.8V
Input Capacitance 15 pF
Outputs Output High Output Low Current Drive
–DCD (39), –CTS (38), –RI (36), Min 4V / 2.4V Max 0.5V / 0.5V (5V / 3.3V) 3.2mA,
–RXD (34) 7.0mA for TXD

3.3V Serial SocketWireless

3.3VDC Characteristics (VDD = 3.3V ± 0.3V) VDDMAX = 3.6V
Inputs Input High Input Low
–DTR (40), –TXD (35), –RTS (33) Min 2.0V Max 0.8V
–RESET (24) Min 2.0V Max 0.8V
Input Capacitance 15 pF
Outputs Output High Output Low Current Drive
–DCD (39), –CTS (38), –RI (36), Min 2.4V Max 0.5V / 0.5V (5V / 3.3V) 3.2mA,
–RXD (34) 7.0mA for TXD

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 159
PART 4 – Embedded Device Servers Chapter 13 – SocketWireless Bluetooth (MTS2BTSMI)

Radio Characteristics
Frequency 2402 – 2480MHz
Modulation FHSS/GFSK
Channel Intervals 1MHz
Number of Channels 79CH
Transmission Rate 721Kbps
RF Receive Sensitivity -80dBm typical
RF Range Class 1 - 100 meters (330 feet)

Antenna Requirements
Frequency Range 2.4-2.5 GHz
Impedance 50 ohm nominal
VSWR <2.0:1
Gain 2 dBi
Radiation Omni
Polarization Vertical
Wave Dipole ½ Wave
Connector Reverse Polarity SMA Plug

Antenna Source
Bluetooth Antenna Available from Multi-Tech:
Part Number Description
ANBT-1HRA Hinged Right Angle 2.5 GHz ½ Wave Reverse Polarity Antenna
Bluetooth antennas also can be ordered from the following manufacturers. For the manufacturers listed
without specific part numbers, be sure to select the antenna that meets the requirements listed above.
http://nearson.com (part number S131AH-2450S)
http://www.ead-ltd.com
http://www.centurion.com
http://www.mobilemark.com
http://woken.com

Antenna Cable and Connector

See Chapter 1 for Antenna System details. Note that the cable for the Wi-Fi SocketModem has a reverse polarity
SMA plug.

Approved Antenna Cable Parts

GC Protronics 20930C
Samtec ASP-116785-01
Coax Cable RG-178/U

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 160
PART 4 – Embedded Device Servers Chapter 13 – SocketWireless Bluetooth (MTS2BTSMI)

AT Command Response Form = Long Form

Bluetooth Service Profile = Serial Port Profile {SPP}
Device Role = Slave
Baud Rate = 9600bps
Data Bits = 8 bits
Parity = None
Stop bits = 1 bit
Hardware Flow Control RTS/CTS = Enabled
Power Mode = Never go into deep sleep mode
Country Code = North America and Europe
Name of Device (local name) = SocketWireless
My Radio Status = 1,0 {slave, disconnected}
Service Name = COM0
Power up default ATSW24 settings = 0,0,0,0 {long response, no authentication, no auto SCO connect, no minor}
Power up default ATSW25 settings = 0,1,0,0 {slave, data, allow data to pass, SPP}
Major & Minor Class Of Device (COD) = 00000000 {undefined}
Security PIN and Encryption Disabled
Default PIN = “default” caps sensitive so do not use any capital letters
Important Security PIN Note:
Do not forget your PIN. Write it down. If you forget it, there is no way it can be retrieved from the device
or the software. You will have to buy a new SocketWireless Bluetooth and start over.
Page Scan Interval = 0x400 {2560msec.}
Page Scan Window = 0x200 {11msec.}
Inquiry Scan Interval = 0x400 {2560msec.}
Inquiry Scan Window = 0x200 {11msec.}
Timeout Connection Parameters
Inquiry = 60 seconds
Slave Connect = 60 seconds
Master Connect = 60 seconds
ATDM idle mode = 60 seconds
ATDM Master Mode = indefinitely (need to perform ATUCL to cancel last command)
Timeout for loss of Bluetooth connection = 4 seconds

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 161
PART 4 – Embedded Device Servers Chapter 13 – SocketWireless Bluetooth (MTS2BTSMI)

From Power Up and No Connection

1. Verify local device is Master in Data Mode.
Sent: ATSi,7 <cr>
Reply: <cr_lf>1,1,0,0<cr_lf>
2. If not Master, set to Master and Data Mode.
Sent: ATSW25,1,1,0,0 <cr>
Reply: <cr_lf>OK<cr_lf>
3. Perform an Inquiry to obtain BT Address (unless it is already known).
Sent: ATUCL<cr> // Clears radio state and places in Idle Mode
Reply: <cr_lf>OK<cr_lf>
Sent: ATDI,1,00000000 {Class of Device}<cr> // Looks for only one Bluetooth device
Reply: <cr_lf>00A0961F2023,00000104,Socket Wireless<cr_lf>
<cr_lf>DONE<cr_lf>
4. Perform a Master Connect over SPP using the BT Address.
Sent: ATDM, 00A0961F2023,1101<cr> // SPP connection
Reply: <cr_lf>CONNECT,00A0961F008F <cr_lf> // Returns Slave BT address radios is in Data Mode
5. Place radio into Fast Data Mode.
Sent: ATMF<cr> // Places radio in Fast Data Mode
Reply: <cr_lf>OK<cr_lf>
6. Send Data.
Note: When sending commands from the Slave when the Slave connects in Fast Data Mode (ATSW25/or issuing
ATMF). All valid AT commands are sent through the Slaves UART will be interpreted and responded by the Master
radio as if it was the local Slave radio. Basically in this configuration from the Slave end you can obtain status and
configure from the remote Master radio. This is a unique feature that may be useful in some applications but can
confuse the user if you think you are talking to the local Slave UART.

To Get Out of Data Mode and Check Status:

1. Delay at least 50 milliseconds; this could be less or more.
2. Get into Command Mode.
Sent: +++<cr> // Default escape sequence of characters
Reply: <cr_lf>OK<cr_lf>
3. Check Status
Sent: AT<cr>
Reply: <cr_lf>OK<cr_lf>
4. Or send any AT Command example:
Sent: ATSI,0<cr>
Reply: <cr_lf>SocketWireless AT<cr_lf>

From Power Up:

1. Check and verify Communication to Slave.
Sent: AT<cr>
Reply: <cr_lf>OK<cr_lf>
2. Get information on Slave Bluetooth address.
Sent: ATSi,1<cr>
Reply: 12-digit address
<cr_lf>OK<cr_lf>
3. Set Slave to automatically connect in Fast Data Mode on Bluetooth connection.
Sent: ATSW25,0,0,0,0 <cr>
Reply: <cr_lf>OK<cr_lf>
4. Either cycle power or send ATURST.
Note: This command sequence assumes the radio is in factory default in which it automatically comes up and is
connectable as a Slave from a Master request.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 162
PART 4 – Embedded Device Servers Chapter 13 – SocketWireless Bluetooth (MTS2BTSMI)

Protocol Change:
For Bluetooth protocol V2.0, the circuit board I/O pin 7 now controls flow control.
Previous Protocol V1.2 New Protocol V2.0
ATSW22,3,x,x ATSW22,7,x,x
ATSW23,3,x,x ATSW23,7,x,x

Disabling Flow Control Using Protocol V.2.0

Using a terminal screen with flow control enabled, issue commands to turn off flow control.
Sent: ATSW22,7,1,0 <cr> // Set PIO7 as output and do not store in flash
Reply: OK<cr_lf>
Sent: ATSW23,7,1,0<cr> // Set PIO7 output high and do not store in flash
Reply: OK<cr_lf>
To store the setting in flash:
Sent: ATSW22,7,1,1<cr> // Set PIO7 as output and store in flash
Reply: OK<cr_lf>
Sent: ATSW23,7,1,1<cr> // Set PIO7 output high and store in flash
Reply: OK<cr_lf>
Now you can communicate with the Bluetooth device with flow control turned off.

See the Bluetooth AT Commands Reference Guide for other examples:

 Multipoint Example Using the SocketWireless MTS2BTSMI or the Bluetooth Adapter MT2BTA – One Slave
and Four Master Devices.
 Multipoint Example Using the SocketWireless MTS2BTSMI or the Bluetooth Adapter MT2BTA – One Master
and Four Slave Devices.
 Repeater Example Using the SocketWireless MTS2BTSMI or the Bluetooth Adapter MT2BTA.

Parameters, such as the Bluetooth Name, Service Name, Class of Device, and Serial Port settings can be viewed
and configured. This can be done locally through the serial port UART or from a remote Bluetooth RF link. To
configure the SocketWireless Bluetooth device, the device must be in command mode by issuing +++.
You can use the developer board and the RS-232 cable to connect to a PC and pass ASCII characters through the
terminal to the SocketWireless Bluetooth device. The communications settings should match the settings used when
the SocketWireless Bluetooth device connects. For example, the defaults are:
9600bps
8 bits
No Parity
1 stop bit
Hardware flow control enabled.
Once you change these parameters, you have the option to store them permanently in the non-volatile memory. Run
your favorite terminal emulator, HyperTerminal, or other program.
 Type AT on your screen and follow it with a carriage return <cr_lf>. You should see "OK" returned to you.
This will verify that your cable and communications settings are correct. When the SocketWireless device is
not connected to another Bluetooth device, you can type the AT commands directly into the SocketWireless'
UART; e.g., you do not have to type +++ to change from data mode to command mode.
 Now you can enter any of the AT commands discussed in the following sections. Follow these commands by
<cr_lf>. Valid commands will return an "OK" or a valid response. Invalid commands will reply ERROR.
 To return to data mode, type ATMD. You can now pass or receive data from a remote connected Bluetooth
device.
Notes:
 If you change communications parameter settings, remember to change your terminal or emulator
communications settings to correspond to the newly created parameter settings.
 AT commands will not echo back to the terminal.

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 163
 Index

MT ........................................................................ 71
NAM ..................................................................... 71
NID ....................................................................... 71
Activation procedures............................................... 36 NV-RAM ............................................................... 71
Antenna system ....................................................... 34 OTAPA ................................................................. 72
AT Commands Reference Guides OTASP ................................................................. 72
SocketEthernet IP (MT100SEM-IP) .................... 144 PDU ...................................................................... 72
SocketModem (MT2492SMI) .............................. 134 PN Offset .............................................................. 72
SocketModem (MT5600/5656SMI) ..................... 110 P-REV .................................................................. 72
SocketModem (MT9234SMI) ................................ 94 PRI ....................................................................... 72
SocketModem CDMA (MTSMC-C) ....................... 65 PRL ...................................................................... 72
SocketModem Cell & iCell (MTSMC-G2 Family) .. 55 PSTN .................................................................... 72
SocketModem EDGE (MTSMC-E) ....................... 73 RF......................................................................... 72
SocketModem HSDPA (MTSMC-H) ..................... 79 RSSI ..................................................................... 72
SocketModem IP (MT5656SMI-IP) ..................... 128 R-UIM ................................................................... 72
SocketWireless Bluetooth (MTS2BTSMI) ........... 157 SID ....................................................................... 72
SocketWireless Wi-Fi (MT800SWM) .................. 151 SIM ....................................................................... 72
Auto-Discovery Manager ........................................ 149 SMS ...................................................................... 72
TA/TE ................................................................... 72
Changing the Quad Band......................................... 63
China’s Administrative Measures on the Control of
Baud Rate Dip Switch Settings for HDSPA .............. 88 Pollution ................................................................ 53
Block Diagram .......................................................... 23 Connectivity Features .............................................. 10
Bluetooth Changing Configurations........................ 163 Country/Regional Codes .......................................... 44
Bluetooth Example of a Master Discovery/Connection
Sequence ........................................................... 162
Bluetooth Example of a Slave Command Sequence
........................................................................... 162 Default Power Up Settings for Bluetooth ................ 161
Bluetooth technology.............................................. 157 Default Power Up Settings for MT800SEM ............ 155
Board Components .................................................. 22 Design Considerations ............................................. 16
Brazil Regulations .................................................... 48 Developer Board ...................................................... 21
Developer Board Schematics ................. 24, 25, 26, 28

CDMA Terminology
2G......................................................................... 71 Electrical Characteristics
3G......................................................................... 71 MT2456SMI-22 ................................................... 141
CBM ..................................................................... 71 SocketEthernet IP (MT100SEM-IP) .................... 147
CDMA ................................................................... 71 SocketModem (MT2492SMI) .............................. 136
cdma2000 ............................................................. 71 SocketModem (MT5600/5656SMI) ..................... 114
cdma2000 1xRTT ................................................. 71 SocketModem (MT9234SMI) ................................ 99
cdmaONE ............................................................. 71 SocketModem Cell & iCell (MTSMC-G2 Family) .. 57
ESN ...................................................................... 71 SocketModem EDGE (MTSMC-E) ....................... 77
Handset Path ........................................................ 71 SocketModem HSDPA (MTSMC-H) ..................... 84
Headset Path ........................................................ 71 SocketModem IP (MT5656SMI-IP) ..................... 132
IMSI ...................................................................... 71 SocketWireless Bluetooth (MTS2BTSMI) ........... 159
IOTA ..................................................................... 71 SocketWireless Wi-Fi (MT800SWM) .................. 154
IS-2000 ................................................................. 71 Electromagnetic Interference Considerations .......... 17
IS-707 ................................................................... 71 Electrostatic Discharge Control ................................ 17
IS-95 ..................................................................... 71 EMC Requirements for Industry Canada ................. 45
IS-95A .................................................................. 71 EMC Requirements for the United States ................ 45
IS-95B .................................................................. 71 EMC, Safety, and R&TTE Directive Compliance...... 45
MCC ..................................................................... 71
MDN ..................................................................... 71
MIN ....................................................................... 71
MNC ..................................................................... 71 Fax Commands Reference Guides .......................... 11
MO ........................................................................ 71 FCC Part 68 Regulation ........................................... 46
MS ........................................................................ 71 Firmware Upgrade ................................................... 29
MSM ..................................................................... 71 Flash Programming Protocol .................................... 31
Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 164
 Index
Flash Upgrade.......................................................... 29 SocketModem (MT9234SMI) .............................. 103
Flash Upgrade Example........................................... 30 Parallel Pin Configurations
SocketModem (MT5600/5656SMI) ..................... 113
SocketModem (MT9234SMI) ................................ 98
Parallel Timing Requirements
Global Positioning System (GPS) Features ............. 64 SocketModem (MT5600/5656SMI) ..................... 115
Global Positioning System (GPS) Technical SocketModem (MT9234SMI) .............................. 100
Specifications ....................................................... 64 Parts....................................................................... 148
Parts for Analog SocketModems .............................. 38
PC Board Layout Guidelines .................................... 16
Peripheral Devices
SocketWireless Wi-Fi (MT800SEM) ................... 155
Handling Precautions related to electrostatic Pin Configurations
discharge control .................................................. 17 MT2456SMI-22 ................................................... 140
HSDPA on Linux ...................................................... 87 SocketEthernet IP (MT100SEM-IP) .................... 146
HSDPA Operating Modes ........................................ 89 SocketModem (MT2492SMI) .............................. 136
SocketModem (MT5600/5656SMI) ..................... 112
SocketModem (MT9234SMI) ................................ 97
SocketModem EDGE (MTSMC-E) ....................... 76
Internal Registers ................................................... 103 SocketModem IP (MT5656SMI-IP) ..................... 131
International Modem Restrictions ............................. 45 SocketWireless Bluetooth (MTS2BTSMI) ........... 159
Interrupt Sources and Reset Control Table SocketWireless Wi-Fi (MT800SWM) .................. 153
MT5600/5656SMI ............................................... 120 Power Consumption for HSDPA .............................. 84
SocketModem (MT9234SMI) .............................. 104 Power Measurements
SocketEthernet IP (MT100SEM-IP) .................... 147
Power Saving Feature for HSDPA ........................... 90
Product Ordering Information
Japan Regulations ................................................... 49 MT2456SMI-22 ................................................... 138
Jumper – 5V / 3.3V .................................................. 22 SocketEthernet IP (MT100SEM-IP) .................... 144
SocketModem (MT2492SMI) .............................. 134
SocketModem (MT9234SMI) ................................ 94
SocketModem CDMA (MTSMC-C) ....................... 65
SocketModem Cell & iCell (MTSMC-G2 Family ... 55
Label Example for Analog SocketModems .............. 41 SocketModem EDGE (MTSMC-E) ....................... 73
Labeling Requirements ............................................ 39 SocketModem HSDPA (MTSMC-H) ..................... 79
Labeling Your Product.............................................. 39 SocketModem IP (MT5656SMI-IP) ..................... 128
SocketWireless Bluetooth (MTS2BTSMI) ........... 157
SocketWireless Wi-Fi (MT800SWM) .................. 151
Programmable Baud Rates Table
Maintenance of Your Modem ................................... 43 SocketModem (MT5600/5656SMI) ..................... 125
Mechanical Drawing in Millimeters for Analog SocketModem (MT9234SMI) .............................. 107
Modems ................................................................ 19 Provisioning for CDMA ............................................. 70
Mechanical Drawings
SocketModem CDMA (MTSMC-C) ....................... 67
SocketModem Cell (MTSMC-G2) ......................... 58
SocketModem Cell with GPS (MTSMC-G2-GPS) 61 Receiver Features for EDGE ................................... 78
SocketModem Cell with Voice (MTSMC-G2-V) .... 59 Receiver Features for HSDPA ................................. 85
SocketModem EDGE (MTSMC-E) ....................... 75 Reset........................................................................ 13
SocketModem HSDPA (MTSMC-H) ..................... 82 RESET – A Design Consideration............................ 13
SocketModem HSDPA-USB (MTSMC-H-U) ......... 83 RF Interface
SocketModem iCell with IP (MTSMC-G2-IP) ........ 60 MTSMC-G2 .......................................................... 62
SocketWireless Wi-Fi (MT800SWM) .................. 154 SocketModem CDMA (MTSMC-C) ....................... 69
Microphone Input for EDGE ..................................... 78 SocketModem EDGE (MTSMC-E) ....................... 78
Microphone Inputs for MTSMC-G2 .......................... 62 RoHS Compliance.................................................... 51

New Zealand Telecom Warning Notice .................... 47 Safety Warning Telecom .......................................... 43
SocketModem CDMA Interfaces .............................. 69
South African Regulations ........................................ 47
Speaker Output for EDGE ........................................ 78
Parallel Interface Stereo jack feed jumper ........................................... 22
SocketModem (MT5600/5656SMI) ..................... 116 Switch Block ............................................................. 22
SocketModem (MT9234SMI) .............................. 101
Parallel Interface Register Table
SocketModem (MT5600/5656SMI) ..................... 117
Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 165
 Index
SocketModem (MT9234SMI) .............................. 108
SocketModem IP (MT5656SMI-IP) ..................... 133
Technical Specifications Transmitter Features for EDGE................................ 78
MT2456SMI-22 ................................................... 139 Transmitter Features for HSDPA ............................. 85
SocketEthernet IP (MT100SEM-IP) .................... 145
SocketModem (MT2492SMI) .............................. 135
SocketModem (MT5600/5656SMI) ..................... 110
SocketModem (MT9234SMI) ................................ 95 Universal Developer Kit contents ............................. 11
SocketModem CDMA (MTSMC-C) ....................... 66 Universal Pin Descriptions ....................................... 12
SocketModem Cell & iCell (MTSMC-G2 Family) .. 56 Universal Socket Design .......................................... 10
SocketModem EDGE (MTSMC-E) ....................... 74 USB Interface for HSDPA ........................................ 92
SocketModem HSDPA (MTSMC-H) ..................... 80
SocketModem IP (MT5656SMI-IP) ..................... 129
SocketWireless Bluetooth (MTS2BTSMI) ........... 158
SocketWireless Wi-Fi (MT800SWM) .................. 152
WEEE Directive........................................................ 50
Telecom Approvals .................................................. 44
Wireless Approvals .................................................. 36
Temperature Control for HSDPA.............................. 90
Wireless Safety ........................................................ 42
Thailand Regulations ............................................... 47
Tip and Ring Interface
MT2456SMI-22 ................................................... 142
SocketModem (MT2492SMI) .............................. 137
SocketModem (MT5600/5656SMI) ..................... 126 XMODEM Serial Port Upgrade................................. 30

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342J) 166