Working Principle
Figure 3-91 illustrates the working principle of the H808ASPB board.
Figure 3-91 Working principle of the H808ASPB board
H808ASPB
B
a
c
k
p
l
a
n
e
C
o
n
n
e
c
t
o
r
Control
board
-48V
DC
power
Power
module
Voltage required
by the board
Clock
module
Clock required
by the board
GE
Interface
module
64*POTS
Backplane
User side
GE
Control module
Processing
module
Interface
module
Test
module
MELT
PSTN
Service
signal
Control
signal
Power
signal
Clock
signal
Test
signal
The basic working principle of the H808ASPB board is as follows:
l The control module processes the high-level protocol between the H808ASPB board and
the control board, manages the service ports of the H808ASPB board, controls the DSP
module, and controls the GE interface module.
l The subscriber line interface module provides 64 channels of the POTS service.
l The processing module converts the pulse code modulation (PCM) data into IP voice
packets, and supports the decoding/encoding and the echo suppression functions.
l The GE interface module supports the GE communication between the H808ASPB
board and the control board.
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:
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.
473
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