Huawei SmartAX MA5600T Hardware Description page 520

SmartAX MA5600T/MA5603T/MA5608T Multi-service
Access Module
Hardware Description
Working Principle
Figure 3-97
Figure 3-97 Working principle of the H802DSRE board
Backplane
Control
board
-48V
DC
power
The basic working principle of the H802DSRE board is as follows:
l
l
l
l
l
The service process is as follows:
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Issue 24 (2018-07-30)
illustrates the working principle of the H802DSRE board.
H802DSRE
GE
Voltage required
by the board
Service
signal
The CPU module controls calls, processes call protocols, and packages voice data.
The ISDN service processing module processes the ISDN service of the board, including
extracting signaling and switching data.
The interface module converts between the media independent interface (MII) interface
and the GE interface.
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, service data is transmitted to the board through the ISDN
service processing module and is packaged by the CPU module. The interface module
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Power
Clock
module module
Clock required
by the board
Power
signal
User side
32*(ISDN)
Clock
signal
3 Board
NT1
500