Function Module and Access Service Flow of Huawei MA5600T/MA5603T/MA5608T

The supports function modules such as service interface modules, Ethernet switching module, and service control module, and supports the xDSL, xPON, and POTS access services.

Overview

The mainly consists of service interface modules, core processing modules, and upstream interface modules, as shown in Figure 1.

Figure 1 Functional architecture of Huawei MA5600T/MA5603T/MA5608T 

Service Interface Modules

The service interface modules provide various ports for the direct access of multiple services. The service interface modules include the following:

• 10G GPON and GPON interface module: comprised by optical module (It receives and transmits optical signals, and converts between optical and electrical signals.), GMAC module (It implements encapsulation and decapsulation of GPON protocol frames.), Layer 2 forwarding module (It implements the Ethernet Layer 2 forwarding and QoS.), CPU (It implements the boards management and service control.), power module (It supplies power to other function modules of the board.) and Clock module (It provides the working clock for various function modules of the board.) to provide the 10G GPON or GPON access. Corresponding to the 10G GPON board and GPON board.
• P2P access module: comprised by optical interface module, Layer 2 forwarding module, CPU, power module, and clock module to provide the P2P access. Corresponding to the OPGD board
• POTS interface module: comprised by the interface module, PCM signal processing module (It converts PCM data into IP voice packets, and implements functions such as encoding/decoding and echo cancellation.), Layer 2 forwarding module, CPU, power module, and clock module to provide POTS access. Corresponding to xDSL over POTS board and some of the voice board, for example ASPB board and VDPD board.
• ISDN interface module: comprised by the interface module, service processing module(It used to processes the ISDN service of the board, including extracting signaling and switching data.), CPU, power module, and clock module to provide ISDN access. Corresponding to some of voice board and xDSL over ISDN board, for example DSRD and VDQM boards.
• GE interface module: comprised by the interface module, CPU, switching module, power module, and clock module to provide upstream transmission and cascading. Corresponding to the ETHB and SPUA boards.
• xDSL interface module: comprised by the interface module, Layer 2 forwarding module, CPU, power module, and clock module to provide xDSL access. Corresponding to the ADSL, VDSL, and SHDSL boards

Different interface modules have different service boards. For details about working principle of an interface module, see the description of the corresponding service board in the Hardware Description.

This section describes the flows of various of access services.

• Service flows passing the Ethernet switching module and then the upstream interface module for upstream transmission, including GPON service flow (GE/10GE upstream), P2P service flow (Ethernet upstream), xDSL service flow (GE/10GE upstream), Converting the native TDM service into E1/STM-1 service flow (E1/STM-1 upstream). Converting the native TDM service into E1/STM-1 service is the native TDM service that is transmitted through GPON is converted by the MA5600T/MA5603T/MA5608T. The device terminates the native TDM service, and transmits the service to the network-side device through E1/STM-1.
• Service flows passing the Ethernet switching module, related service processing modules, and then the Ethernet switching module for upstream transmission. Such service flows convert the native TDM service into SAToP service and POTS service that use GE/10GE for upstream transmission. In this service flow, the native TDM service that is transmitted through GPON is converted by the MA5600T/MA5603T/MA5608T. The device encapsulates the native TDM service into PWE3 service. Therefore, this service flow is also called converting the native TDM service into TDM PWE3 service. The purpose of this service flow is to ensure the emulation transmission of the TDM service.