Huawei SmartAX MA5603T - Page 553

Working Principle
Figure 3-104 Working principle of the H808ADLE board
B
a
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k
p
l
a
n
e
C
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e
c
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PSTN
-48V
DC
power
Power
module
Voltage required
by the board
Clock
module
Clock required
by the board
Control
board
Clock
signal
Service
signal
Control
signal
Power
signal
Backplane
Front panel
PSTN
ATU-R
LINE
GE
Control
module
Interface
module
Forwarding module
Protection module
DC
block
Protector
SPL
module
H808ADLE
The basic working principle of the H808ADLE board is as follows:
l The control module loads the board software, controls the running of the board, and
manages the board.
l The protection module protects and isolates the board from lightning strikes. The DC
block isolates the direct current. The protector protects the high voltage.
l The splitter in the interface module separates ADSL2+ signals and POTS signals from
ADSL2+ over POTS signals sent by the ATU-R. The interface module converts
ADSL2+ signals into cell flows, aggregates the cell flows to the forwarding module, and
then reassembles the cell flows into ATM packets. The POTS signals are transmitted to
the PSTN device through the PSTN port. In the opposite direction, the splitter in the
interface module combines the ADSL2+ signals from the forwarding module and the
POTS signals from the PSTN device into ADSL2+ over POTS signals. Such signals are
transmitted to the ATU-R through the LINE port.
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.
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