Huawei SmartAX MA5600T Hardware Description page 571

SmartAX MA5600T/MA5603T/MA5608T Multi-service
Access Module
Hardware Description
Working Principle
Figure 3-108 Working principle of the H805ADPD board
Backplane
Control
board
-48V
DC
power
The basic working principle of the H805ADPD board is as follows:
l
l
l
l
l
l
The service process is as follows:
Issue 24 (2018-07-30)
H805ADPD
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.
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Protection module
DC
Protector
block
Clock
module
Clock required
by the board
Power Clock
signal signal
Front panel
ADSL2+
over
POTS
xDSL0 ATU-R
xDSL1
POTS
PSTN
3 Board
551