Figure 3-95 Working principle of the H802DSRD board
H802DSRD
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NT1
32*(ISDN)GE
-48V
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Clock
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Clock required
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Control
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Clock
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Power
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User side
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The basic working principle of the H802DSRD board is as follows:
l The CPU module controls calls, processes call protocols, and packages voice data.
l The ISDN service processing module processes the ISDN service of the board, including
extracting signaling and switching data.
l The interface module converts between the media independent interface (MII) interface
and the GE interface.
l The power module supplies power to each functional module of the board.
l The clock module provides clock signals for each functional module of the board.
The service process is as follows:
l 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
converts the packaged data into GE packets and transmits the packets to the control
board through the GE bus of the board. Then, the packets are transmitted upstream.
SmartAX MA5600T/MA5603T/MA5608T Multi-service
Access Module
Hardware Description
3 Board
Issue 24 (2018-07-30) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
495
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