Huawei SmartAX MA5600T Hardware Description page 595

SmartAX MA5600T/MA5603T/MA5608T Multi-service
Access Module
Hardware Description
Working Principle
Figure 3-112 Working principle of the H802ADKM board
Backplane
Control
board
-48V
DC
power
The basic working principle of the H802ADKM board is as follows:
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Issue 24 (2018-07-30)
H802ADKM
GE
Forwarding module
Interface
module
Control
module
Power
module
Voltage required
by the board
Service Control
signal signal
The control module loads the board software, controls the running of the board, and
manages the entire board.
The protection module protects and isolates the board from lightning strikes. The DC
block isolates the direct current. The protector protects the high voltage.
The interface module supports two functions:
– In the upstream direction, the interface module converts line signals into a cell flow,
aggregates the flow to the forwarding module, and then reorganizes the flow into
ATM packets.
– In the downstream direction, the forwarding module transmits the ATM cell flow to
the interface module. Then, the interface module converts the flow into downstream
line signals.
The forwarding module processes services. The detailed process is described later.
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.
The MELT module provides the MELT test function for digital subscriber lines.
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Protection module
DC
Protector
block
MELT
module
Clock
module
Clock required
by the board
Power Clock
signal signal
3 Board
Front panel
xDSL1
xDSL0 ATU-R
Test
signal
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