ZTE FTTX Solution
ZTE FTTX Solution
                                           Sunny
                                Fixed-Network Manager
                                         09400788823
                             shangni.sunny@zte.com.cn
                                            ZTE
                                              Confidential▲
            The broadband access market is fast growing and has huge potential
                                         © ZTE All rights reserved
4
Big Data Spurs High Bandwidth Network Construction                                  Confidential▲
              Air
              Sharing
                    4K/8KTV
                              Cloud                                 Intelligent
                              Service                               Network
                                        Virtual                          MBB-FBB
                                        Reality                       Convergence
                                                                                                                                        FTTH
        SS/IMS                   40                                                                                                                                        SFU
                                      G/
                                           10
                                                G/                                  Splitter                    Detection/Diagnosis                                        HGU
                                                     GE
                     BNG/BRA                              /F
                                                               E        OLT
                    S/SR/Switch                                                                                                          FTTM                               eNodeB
      VoD/IPTV                   IP                                E/                                                                                           ONU/CBU
                                           /F                                         Splitter                      Detection/Diagnosis
                                        GE                                                                                                                                BTS/NodeB
                                    0 G/ M -N
                                   1 / ST
                                G/
                             4 0 1 /T1
                    BNG/BRAS     E                                                                                                                            FTTH
                    /SR/Switch                                                                                                                                                   SFU/HGU
     Internet/OTT                                                                                                                                             FTTO
                                                                                                                                                                           SBU
                                            Management/OAM/                                          OLT                     Splitter                      FTTdp
         TDM                                    Diagnosis
                                                                                                                                        Detection/Diagnosis               DPU
                                                                              OLT                                                                  Modem
                                                                                                                                FTTB
       BSC/RNC
                                                                                                                                                                                      CPN
                                                                                                              OLT             Splitter MDU/MTU
                                                                                                                                                      Laptop
                                                1550nm
         CATV                                                                                                                                         PC
                                G E /1 0                                                                          ONU                             CATV
                                           G E /4 0
                                                      GE
            IPTV server                                                                                                                           Phone
                                                                        Splitter
                                                                 WDM
                                              GE                                                                                                       Laptop
                                   G   E /1 0                                                            1 ONU +1 HGU
          SS/IMS Internet
                                                                                                                                                       IPTV
                                                           EMS
                Optical fiber                 Ethernet cable
                 Phone line                   Coaxial cable                                                                                            Phone
     Features                                                                             Benefits
     n   In initial phase, OLT is installed at C.O and easy for maintenance;               n    100~1000Mbps bandwidth access.
         in large scale phase, OLT is installed at equipment room near to                  n    Provides HSI, VoIP, IPTV, CATV, and other services.
         the subscriber                                                                    n    Reduces OPEX and is easy to maintain.
     n   With high bandwidth to the user, but has high CAPEX, and the
         engineering is much complex.
                                                                        © ZTE All rights reserved
9
 FTTO Solution                                                                                                                                   Confidential▲
PBX Phone
                                  G E /1
                                           0G E /
             IPTV server                            40G E
                                                                                                             ONU                            PC
                                                                    OLT
                           E1/T1 /STM-1/STM-4
     Features                                                                               Benefits
     n   OLT is installed at C.O and easy for maintenance                                    n    Provide 100~1000Mbps to enterprise and business users.
     n   Fiber is deployed at office, less than 50m between ONU and                          n    Support TDM leased line, VPN, HSI, VoIP and wholesale
         subscriber.                                                                              services
     n   Use SBU(few ports) and MTU(more ports, even with PoE                                n    Easy for maintenance and save OPEX
         function) for access
                                                                          © ZTE All rights reserved
10
 FTTB Solution                                                                                                                                                  Confidential▲
     Features                                                                                     Benefits
     n   Reuse the existing CAT-5 or twisted-pair, the distance between to                         n    Low investment, full leverage optical fiber and copper resource
         the users is less than 100m.                                                              n    Fiber deeper, VD2 Vectoring has more advantage, 100M +
     n   Splitter is installed in the corridor, ONU uses LAN/DSL type MDU                               access is possible
     n   Save fiber resource, number of PON port and OLT ,the density                              n    Fast deployment, low operation and maintenance cost
         and cost FTTB is lower than FTTH.                                                         n    Fiber closer to end user, easy migration to FTTH
                                                                                    © ZTE All rights reserved
11
 FTTdp Solution                                                                                                                                       Confidential▲
                                 G E /1 0 G                                                                                                 RG
                                              E /4 0 G E                                                                     DPU
            Internet/CDN                                    OLT
             SS/IMS
                 Optical fiber      Ethernet cable         EMS/ACS
                 Phone line                                                                                                           DPU        RG
     Features                                                                             Benefits
     n   As the supplement of FTTH, manage and maintenance like FTTH                       n      Easy deployment, solve the issue of cabling and power
     n   OLT is installed at C.O, DPU is installed outdoor or pole mounted, and                   supply
         is less than 200m to the users.                                                   n      Fiber deeper, VD2 Vectoring and G.fast has more advantage,
     n   DPU uses VDSL2/G.fast via twisted-pair for access, and can provide                       100M -1000M high speed access is possible
         reversed power from the home to solve the problem or power supply.                n      Zero-touch, self-install, easy operation, low TCO
                                                                      © ZTE All rights reserved
12
 FTTC Solution                                                                                                                                        Confidential▲
                                        G E /1                                                            Cabinet                                  Phone
                                                 0G E
                                                        /4 0 G
                    IPTV server                                  E
                                                                     OLT                                                   MDU                     Modem
                                  E1/T1 /STM-1/STM-4
                         PSTN                                                         Splitter
                                                      E /4   0G E                                                                                    Phone
                                          GE   /1 0 G
     Features                                                                               Benefits
     n   OLT is installed at C.O, MDU is installed at outdoor cabinet,                      n    Low investment, full leverage optical fiber and copper resource
         residential equipment room or OCC. The distance between                            n    Fiber deeper, VD2 Vectoring has more advantage, up to 100M
         MDU and users is 500~1000m                                                              access
     n   xPON+AD2/AD2+ and xPON+VD2/G.fast to meet different                                n    All in one cabinet, fast deployment, fast provision
         bandwidth access requirements.                                                     n    Use the existing copper resource
NG Network
                        02.   GPON Migrates to 10G PON
                                                        ITU-T G.984.2
  ITU-T G.984.1                                         • Physical Media Dependent(PMD) layer specification
  • GPON general characteristics                        • Optical interfaces specification for 2.488Gbit/s
  • Protection switchover                                 downstream/1.244 Gbit/s upstream
    requirements                                        • Physical layer overhead definition
ITU-T G-984.1/2/3/4
ITU-T G.984.3
• Transmission Convergence layer                      ITU-T G.984.4
  specification                                       • ONT management and control interface(OMCI)
• GTC multiplex structure and protocol                  specification
• GTC frame structure definition                      • OMCI equipment management architecture
• Specification of the ONU registration               • OMCI principle introduction
  method and various clarifications
• DBA specification
• Alarms and performance
     GPON System Architecture                                                                                                Confidential▲
ONT
OLT
                                                                                                               ONT
                          NMS
Line Rate:                                                   Logical split ratio: 1:128
                                                                                               single-fiber bi-directional
 ● 155 Mb/s up, 1.25 Gbit/s down                                                                                               WDM
                                                                                        20km   transmission mechanism
 ● 622 Mb/s up, 1.25 Gbit/s down
 ● 1.25 Gb/s up, 1.25 Gbit/s down                                   Logical reach: 60km
 ● 155Mb/s up, 2.5Gbit/s down                 Downlink wavelength: 1490nm                      centralized bandwidth allocation,
                                                                                               control of ONUs,
 ● 622 Mb/s up, 2.5 Gbit/s down               Uplink wavelength:1310nm,                        real-time monitoring,
 ● 1.25 Gb/s up, 2.5 Gbit/s down              Third party wavelength:1550nm                    operation, maintenance
 ● 2.5 Gb/s up, 2.5 Gbit/s down                                                                management of the PON system
                                                            © ZTE All rights reserved
16
     GPON Principles                                                                                 Confidential▲
PCBd 1 2 N
     § Broadcast:GPON downstream frame 125us,downstream through broadcast,all ONU will accept the
       same message,through different ONU ID to distinguish different messages,ONUs filter their own
       messages.
                                                                  Upstream frame
                                                                       125µs
1 2 N 1 2 N 1 2 N
     § TDMA:GPON upstream through TDMA,the upstreams are divided into different timeslots, which are
       depending on the upstream bandwidth map field in ONU downstreams, so all the ONUs can deliver the
       messages according to the same order, without any conflicts.
                                                   © ZTE All rights reserved
17
 GPON Downstream/Upstream Dataflow                      Confidential▲
WDM PON
                                                           GPON ONU
                                                                                          GPON OLT                                     GPON ONU
                                                           GPON ONU
                                                                                                 Analysis
        GPON OLT                                           GPON ONU                       Solution 1: The chip built in Combo cards combines
                                               Splitter                                   two wavelengths into one fiber.
                          WDM 1r
                                         ODF               GPON ONU                       Solution 2: The WDM1r combines GPON and 10G
        10G GPON                                                                          GPON signals.
           OLT                                            10G GPON ONU
                                                                                          Solution 3: 10G GPON and GPON exist in different
        Solution 2: External WDM1r Architecture                                           ODNs.
                                                                                                                GPON ONU
             Replace GPON card
        1    with Combo PON card
                                                                                                                GPON ONUONU
                                                                                                                10G GPON
                                                                                                                10G GPON
                                                                                                                GPON ONU ONU
                                                                 2        No ODN change
                                                                                                             New 10G GPON
                                                                                                       3     ONU
                                        Central Office                                      ODN              Customer Premises
1. Not enough trunk fiber 2. Limited site room 3. Difficult for cabling
     The trunk fiber resources are   It is hard to deploy new OLT or other                   It is difficult for cabling. The cost of
     insufficient.                   equipment in the equipment room.                        cabling is very high.
                                                  4                                    Data Configuration
                                                                                                     01010101
     1        On-demand                               Reuse existing configuration data of GPON users. Create10G GPON configurations
            ONU Replacement                           for 10G GPON users. Ensure minimum configuration data alteration.
ONT replacement
Change
Connect fibers to Combo cards. ODN unchanged and no extra light attenuation.
                                                                                      Upstream direction:
                                                                                      • Two wavelengths are divided
                                                                                      and sent to different MAC chips.
                              λ GPON                                                  • GPON and 10G GPON traffic
                                                                                      undergo separated DBA, thus
                                                                                      no interference.
                              λ 10G          WDM1r
         GPON                                                                                                GPON ONU
          MAC                 GPON
                                Optical Module
        10G GPON
          MAC
                                                                           Splitter
                                                                                                             10G GPON ONU
 GPON & 10G GPON            The WDM1r built in the                                    Downstream direction:
 signals are processed in   optical module combines                                   • T w o w a v e l e n g th s a r e
 different MACs, which      two wavelengths into                                      sent simultaneously.
 are integrated in one      one fiber.                                                • Each ONU receives its
 chip, and then combined                                                              own signal with a built-in
 into optical module.                                                                 wavelength filter.
          EMS                          Ø Adjust the  interface with provision: ADD_ONU , Add a parameter to the interface command to
                                        specify the ONU channel type is GPON、10G GPON or self-adaption
                           NBI
                                       Ø Add the channel type “GPON” and “10G GPON” for the NBI to query the port bandwidth
                                        utilization rate and optical power
                                       Ø Use the “modify-card” command to modify legacy GPON line card into Combo line card
                                       Ø Plug out the legacy GPON line card and insert a Combo line card
          OLT              CLI
                                       Ø Legacy GPON services will be uploaded automatically on the inserted Combo line card
                                       Ø Newly add the 10G GPON service
                                                             © ZTE All rights reserved
25
 Implementation of the Combo PON Solution                                                                                                    Confidential▲
Advantages
                                               4                                      Data Configuration
                                                                                                   01010101
     1        On-demand                             Reuse existing configuration data of GPON users. Create10G GPON configurations
            ONU Replacement                         for 10G GPON users. Ensure minimum configuration data alteration.
ONT replacement
            WDM as a 1U sub-rack unit or built into an ODF, and the introduction of external
            WDM1r device will increase an insertion loss of 1.5dB
WDM1r
                                                                          ...
                                                                         WDM1r
                                                                                            Step5: Newly add a
                                                                                            patch cord form the
                                                                                            output port of WDM1r to
                                                                   Combiner Rack            ODF
      GPON OLT         10G GPON OLT
                                                                                                            GPON ONU
         Video             GPON OLT
                                       Ø Newly add 10G GPON OLT and 10G GPON line card configurations
                                       Ø Newly add 10G GPON line card services
          OLT              CLI
                                       Ø Migrate existing GPON services to the 10G GPON service as per user requirements
                                        (use the cutover tools to carry out the cutover process)
Advantages
     EMS/NMS
                          GPON           PtP                                                                                XG-PON ONU
                              10G GPON     TWDM-PON
                                                            WDM 1r                                          Splitter
        Video                                               WM+CEx                         ODF
                                         ZTE-OLT                                                                            XG-PON ONU
     Features     n     GPON, 10G GPON and TWDM-PON signals can all be carried with the same ODN based on the wavelength
                        multiplex. Easy to plan and management.
                  n     Only the upgraded user’s profile needs to be reconfigured under the 10G GPON port when one user
                        upgrades to TWDM-PON.
                  n     Maturity of 10G GPON Industrial chain can greatly promote the maturity of the TWDM-PON industrial
                        chain.
Service Bearing
Solution          03. IPTV       04.   CATV
            •   Flow classifier
            •   VLAN configuration          •    Flow mapping
                                            •    Flow queuing &
                                                 scheduling                                              •   Flow mapping            •   Flow classifier
                                                                       •   DBA                           •   Flow queuing &          •   VLAN configuration
                                      OLT                                                                    scheduling
                              SNI
                                             PON
                                                                       ODN                                                                             PPPoE
                                                                                                                     PON           ONU                   data
     BRAS                                   GEM Port X                                                   TCONT Y     GEM Port X                 UNI
        Internet
                                                                    Step 2:
      Step 1:                                                       VoIP configuration                                                               Step 3:
      Flow configuration                                            •   VoIP parameters                                                              Data flow exchange
      •   Unicast PON channel                                           configuration(OMCI or Web)                                                   •     SIP/H.248 signal exchange
      •   VLAN channel                                              •   WAN side configuration(static IP                                             •     End to end connection
      •   Flow management                                               address or dynamic IP address via                                            •     RTP/RTCP over Ethernet
                                                                        PPPoE/DHCP)
                                   SNI
                                                PON                                                                                          ONU                      Voice data
                                                                              ODN                                                                                      SIP/H.248
Softswitch                                                                                                                     PON                             UNI                     IAD/HGW
                                               GEM Port X                                                     TCONT Y          GEM Port X
                                                                                                                                                         IAD   POTS
      IP/Ethernet                                                                                                                      Voice Data
                                                                                                                                                          SIP/H.248
      PSTN
                                                                                    built-in IAD                  n     At the subscribe side, there are two ways to provide VoIP service
                                                                                    • VoIP parameters                   •   External IAD or HGW
                Optical fiber            signal data
                Ethernet cable            Voice data                                • WAN parameters                    •    ONU with built-in IAD function in POTS interface
                Phone line                VLAN /PON channel
                                                                                  © ZTE All rights reserved
 39
     IPTV/4K IPTV Service Bearing                                                                                                                          Confidential▲
                                                          • IGMP                                                    • Flow
                                                                                                                 • IGMP    queuing
                                                                                                                        snooping          • IGMP host
   • IGMP router                                            proxy/snooping                                            &scheduling
                    01. OLTs
Product Portfolio
                    02. Cabinets
                    03. ONUs
                    04. NetNumen U31
Series of FTTx Products                                                                                                                   Confidential▲
     FTTx O&M
      System                                        xPON OLT
                                                           •ZXA10 C300                   •ZXA10 C350                  • ZXA10 C320
     • EasyService/EasyOptical
                                                   Accessories
                                                          • ODN                         • Cabinet                     • Backup Power
                                 • NetNumen U31
     Full-configuration capacity of
     256       GPON Ports                                                Power card
                                                                                           2.56T
               CLI: RJ45 for local debugging interface
XG1-XG4: 10GE optical interface for uplink L2 packet forwarding rate: 1904Mpps
     SCXN
                                                       © ZTE All rights reserved
47
 GPON Subscriber Cards – GTGH                                                                               Confidential▲
 GTGH
                                                     © ZTE All rights reserved
48
XG-PON Subscriber Card – GTXO                                                                               Confidential▲
1 - 8: XG-PON ports
     GTXO
                                                  © ZTE All rights reserved
49
 COMBO PON Subscriber Card – GTBO                                                                             Confidential▲
     GTBO
                                                  © ZTE All rights reserved
50
XGS-PON Subscriber Card – GTTO                                                         Confidential▲
1 - 8: XGS-PON ports
GTTO
 Ethernet Uplink Cards – GUFQ/GUSQ                                                                                       Confidential▲
            CLKI1-CLKI2: 75Ω BITS clock input interfaces                               CLKI1-CLKI2: 75Ω BITS clock input interfaces
            CLKO/1PPSO: 75Ω BITS/1PPS clock output interface
                                                                                             CLKO: 75Ω BITS clock output interface
            CLKI1/TIMI1-CLKI2/TIMI2: 120Ω BITS/1PPS+TOD
            clock input interfaces                                                          ETH1-ETH2: Out-of-band maintenance
                                                                                            network port
            CLKO/TIMO: 120Ω BITS/1PPS+TOD clock output interface                                         COM: Public serial port
ETH: Out-of-band maintenance network port 232/485: Maintenance reserved serial port
                                                                                          Service card
                                                                                          Switch & Control card
                                                                                          with Uplink and Power modules embedded
     Full-configuration capacity of
     32      GPON Ports                                            Support clock and time synchronization.
     16      XG-PON Ports                                          85% installation space saved compared to large OLT.
     16      Combo PON Ports                                       2U height, brings a more flexible deployment.
                          SMXA/1    Type A control and switch card with 1 GE and 1 GE/FE optical interface uplink
     Control & switch
                          SMXA/3    Type A control and switch card with 1 10GE/GE and 1 GE/FE optical interface uplink
          cards
                          SMXA/5    Type A control and switch card with 1 GE and GE/FE optical interface uplink (1588v2)
     PRAM
                                                     © ZTE All rights reserved
58
ZXA10 C350: Medium-Capacity & Economic Optical Access PlatformConfidential▲
                                                                                        Uplink card
     Full-configuration capacity of
     112       GPON Ports                                                                                   Service card
     56        XG-PON Ports
                                                                Switch
                                                                     &
B6030-22C-EB
                                                                                  B6030-22C-IA (19-inch):
                                                                                  two ZXA10 C300/ZXA10 C320 shelves
                                                     Product configuration
                                                                                  B6030-22C-EB(21-inch):
                                                                                  two ZXA10 C300 shelves 350
                                                    Environment detecting
                                                                                  None
                                                           module
     As a large-size indoor cabinet, the B6030-22C-IA/B6030-22C-EB are easy to install. It is suitable for both
     large- and compact-capacity integrated access equipment such as the ZXA10 C300 and ZXA10 C320.
                                                      © ZTE All rights reserved
60
 Outdoor Cabinet for ZXA10 C300 - EC40EB                                                                                   Confidential▲
ODF 24*12-core
                                                   Maximum power
                                                                                 1900w (50°C + 1120 W/m2)
                                                    consumption
     As an outdoor telecom cabinet, the EC40E has strong environment adaptability with a heat exchanger. It is
     suitable for large-capacity integrated access equipment such as the ZXA10 C300.
                                                     © ZTE All rights reserved
61
Outdoor Cabinet for ZXA10 C320 – EC90EB                                                                              Confidential▲
                                                         Maximum power
                                                                                 300w (45°C + 1120 W/m2)
                                                          consumption
     As an outdoor telecom cabinet, the EC90EB provides a safe and reliable operating environment for
     compact integrated access devices such as the ZXA10 C320.
                                                     © ZTE All rights reserved
62
 Outdoor Cabinet for ZXA10 C320 – EC70E                                                                                    Confidential▲
                                                                                      wall-mounted /pole-mounted/cement
                                                               Installation mode      platform mounted/elevated platform
                                                                                      mounted
                                                           Environment detecting
                                                                                      EMM
                                                                  module
                                                               Maximum power
                                                                                      1120w (50°C + 1120 W/m2)
                                                                consumption
     ZTE EC70E Cabinet is an enclosed telecommunications cabinet that features low noise, low power consumption, and less
     maintenance. It is suitable for compact integrated access equipment such as the ZXA10 C320.
                                                          © ZTE All rights reserved
63
 Outdoor Cabinet for ZXA10 C350 – EC50EC-S                                                                                 Confidential▲
                                                           Environment detecting
                                                                                      ETMB
                                                                  module
     ZTE EC50EC-S Cabinet is an outdoor enclosed telecommunications cabinet that is used for housing medium access
     equipment like ZXA10 C350 and provides a safe and reliable operating environment for them.
                                                          © ZTE All rights reserved
64
  DSL MDU and DPU Family                                                                                                                    Confidential▲
ZXDSL xDSL Series Products ZXA10 Vectoring Series Products ZXA10 DPU Series Products
FTTC
6/3U                ZXA10 C350M
                      (256-384L)
FTTB
 2U                 ZXDSL 9806H                                  ZXA10 9806V
                      (32-256L)                                   (32-256L)
FTTdp
                                                                                                         ZXA10 9852G          ZXA10 9819G
                                                                                                         (8/16 L G.fast)      (8/16 L G.fast)
         Features
         n   ZXA10 F832 is a XG-PON Optical Network Unit used in FTTB/FTTO scenario.
         n   New generation of fixed type MDU based on GE architecture.
         n   Supports VoIP and data service access.
         n   Supports high-demanding enterprise networks, campus networks, commercial
             buildings and other scenes.
User Interface 1 GE
         Features
         n   ZXHN F601 is a GPON Optical Network Terminal designed for FTTH scenario.
         n   It provides high-performance forwarding capabilities to ensure excellent experience with
             Internet and HD video services.
         n   It has a small, smart appearance and green, energy-saving advantage.
         n   Compact housing design . OMCI for remote management
                OSS
                             Unified network                      Hierarchical topology
                               management for
                               OLTs, ONUs and                                                   Flexible remote batch
                               ODN                                                                 upgrade strategy
          OLT                                                                             ONT
                                         Splitter                                                 FTTH
                                                                                MDU DSL/LAN
                                                                                                  FTTB
                                                    © ZTE All rights reserved
68
                                            ZTE
                                             Confidential▲
•   Line-speed forwarding        •   4K VLAN, 1:1/N:1 VLAN   •   Statistic routing             •          IGMP V1/2/3, IGMP snooping       •   8 queues per port
•   STP/RSTP/MSTP compliant      •   IEEE 802.1ad, SVLAN,    •   RIP V1/V2,OSPF v2,IS-IS, BGP,            and proxy (v1/v2/v3)             •   Queuing & scheduling
    with IEEE                        Selective QinQ, VLAN        ECMP                          •          8K multicast groups, 4K              mechanism: SP, DWRR,
    802.1d/802.1w/802.1s             stacking, Super VLAN    •   Multicast routing: PIM-SM                Multicast VLAN (MVLAN), 1024         SP+DWRR
    Link aggregation IEEE            64k-256k MAC address                                                 IPTV package set table               IPv4 DSCP Diffserv
•                                •                           •   BFD for static route                                                      •
    802.3ad                          table depth             •   BFD for OSPF
                                                                                               •          Channel Access Control (CAC),    •   Stream classification, rate
•   DHCP server, DHCP Relay      •   802.1x@VPort                                                         Preview (PRV) and Call Detail        limiting, shaping and priority
    (option 60/82), DHCP proxy                                                                            Record (CDR) for IPTV                setting
•   PWE3, MPLS                                                                                        •   Less than 50ms channel zapping   •   Traffic statistics
                                                                                                          delay
                                                                                                                                           •   WRED and triple color
                                                                                                                                           •   SLA: CIR, PIR, EIR, MBS
                                                                                              ONU                   STB
                                 GE/10GE/40GE
                                                       OLT                      Splitter
                SR/BSC                                                                        ONU                  eNodeB
                             Optical fiber
                             Ethernet cable     EMS                                                         BS
                              Phone line
              OLT supports Ethernet OAM standards: IEEE 802.3ah, IEEE 802.1ag, and ITU-T Y.1731
                                                                  © ZTE All rights reserved
71
Ethernet Ring Protection Switching (ERPS)                                                                                   Confidential▲
OLT1
                                 PortPort
                                     2 2                                                  Port 1
                                 Unblocking
                                     Blocked
                                                                                                         Port 1
                     Port 2
                                                                        A
            OLT4                                 D                                                 B                 OLT2
                     Port 1                                             C                                 Port 2
                                                                       OLT3
                         Link Fault
                                                     Port 2
                                                                                               Port 1
I. The two main control cards can both work in 1+1 or 1:1 mode.
            ZXA10 C300
                         FAN
             P                                                                                            L
             R                                                                                            C    Up
             W                                                               L        L   L   L   L   L       link
                 L   L   L   L   L   L   L   L     S        S       L             L                       /
             R                                                               C        C   C   C   C   C
                 C   C   C   C   C   C   C   C    CT       CT       C            C                        C
             P                                                               1        1   1   1   1   1
                 1   2   3   4   5   6   7   8    M        M        9            11                       I    Up
             R                                                               0        2   3   4   5   6
             W                                                                                            C   link
             R                                                                                            K
                               Splitter 2:N
            ONU1                                                                                 Type B: OLT-only duplex system:
                                                                                                 It backs up the OLT and the optical fiber
                                                                                                 between the OLT and the optical splitter.
                                          Fiber broken       OLT
        ONU2
                      Splitter 1:N
                                          Fiber broken                                           Type C: Full duplex system:
       ONU1                                                                                      It backs up the OLT, ONU, optical splitter and all
                                                                                                 optical fibers.
                                                             OLT
      ONU2      Fiber broken
                           Splitter 1:N
                                                                                                  Dual parented OLT protection:
       ONU1
                                              Fiber broken                                        Protection in the GPON system is between
            Fiber broken
                                                               OLT                                one ONU and two OLTs via the ODN.
                                                                             OLT
     ONU2
                        •   Dynamic power-saving: Auto Laser Shutdown (ALS) periodically shuts down the LOS PON port.
                        •   Intelligent fan: Fan speed is adjusted according to the environment temperature.
     OLT power-saving   •   Power management: OLT shuts down idle PON ports and PON boards.
        measures        •   High-density board ports: Higher integration and lower power consumption chipsets and PCB
                            board with 16 PON port each board.
                        • Low power management: AD2/AD2+/VD2 support L0-L3. Ethernet ports support the IEEE
     MDU power-saving     802.3az(EEE) standard.
                        • More efficient chipset : Efficient driver chipset for the MDU.
        measures        • Configuration MMA: limits output power intensity.
                        • Idle state: If there is no connection, the link switches to idle state.
                        • ONU power management: If there is no traffic, the PON port switches to dozing mode, where it
     ONT power-saving     only detects traffic periodically.
                        • Wi-Fi power-saving mode: Periodic switch-on/off as scheduled, and MIMO power saving.
        measures        • SOC power management: Integrated chipsets with different dormant levels
Summary
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