Huawei SmartAX MA5600T Hardware Description page 510

SmartAX MA5600T/MA5603T/MA5608T Multi-service
Access Module
Hardware Description
Working Principle
Figure 3-94
Figure 3-94 Working principle of the H80CASPB board
The basic working principle of the H80CASPB board is as follows:
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The service process is as follows:
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Issue 24 (2018-07-30)
illustrates the working principle of the H80CASPB board.
The control module processes the high-level protocol between the H80CASPB board and
the control board, manages the service ports of the H80CASPB board, controls the DSP
module, and controls the GE interface module.
The subscriber line interface module provides 64 channels of the POTS service.
The processing module converts the pulse code modulation (PCM) data into IP voice
packets, and supports the decoding/encoding and the echo suppression functions.
The GE interface module supports the GE communication between the H80CASPB
board and the control board.
The power module supplies power to each functional module of the board.
The clock module provides clock signals for each functional module of the board.
In the upstream direction, the service data is transmitted to the H80CASPB board
through the POTS port. After being processed by the TDM processing module and the
VoIP service processing module, the service data is transmitted to the control board
through the backplane and then to the upstream direction.
In the downstream direction, the service data is transmitted from the control board to the
TDM processing module and the VoIP service processing module through the backplane
bus and the interface module. After being processed by the TDM processing module and
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