Huawei ATN 950B - Working Principle and Signal Flow

Table 5-13 Functions and features of the AND1EM8F
Function and Feature Description
Basic function Supports eight FE/GE optical interfaces, on which FE optical
modules and GE optical modules can be mixedly used.
Accesses 8 x FE/GE electrical signals, and processes the
services with the AND1CXPA/AND1CXPB.
Supports the hot swappable function.
Detects the temperature and voltage of the board.
Interface function Supports PHY-layer inloop and outloop.
Supports MAC-layer outloop.
Supports automatic loopback release at the port.
Clock Supports synchronous Ethernet.
Supports SSM protocol.
Supports IEEE 1588V2 protocol.
Supports 1588 ACR clock.
5.4.3 Working Principle and Signal Flow
The AND1EM8F mainly consists of the service access module, service processing module,
management module, clock module, and power supply module.
Figure 5-7 shows the block diagram for the functions of the AND1EM8F.
Figure 5-7 Block diagram for the functions of the AND1EM8F
CXP
Service access
module
Clock
module
Service
processing
module
Management
module
8 x FE/GE
optical signals
Service signals
Management bus
-48V/-60V
-48V/-60V
3.0V
1.8V
Power
supply
module
Back plane
Clock signals
CXP
CXP
2.5V
Each module on the board
3.3V
1.2V
Service signals
Management bus
Management bus
Clock signals
System power
supply
System power
supply
Transmit Direction
The service packets from AND1CXPA/AND1CXPB are sent to the service processing module
through the backplane-side interface of the EM8F. The service processing module identifies the
ATN 950B Multi-service Access Equipment
Hardware Description 5 Physical Interface Card
Issue 03 (2012-07-23) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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