Huawei ATN 950B - Working Principle and Signal Flow

Function and Feature Remarks
ML-PPP Number of supported ML-
PPP groups
8
Maximum number of links
supported by each ML-PPP
group
16
Functions as the UNI interface to access IP packets of the
L3VPN services.
Clock Physical Synchronization Supported
5.6.3 Working Principle and Signal Flow
The AND1ML1/AND1ML1A mainly consists of the control module, line-side processing
module, system-side processing module, backplane interface module, clock module, and power
supply module.
Figure 5-11shows the block diagram for the working principle of the AND1ML1/AND1ML1A.
Figure 5-11 Block diagram for the working principle of the AND1ML1/AND1ML1A
Backplane
Backplane
interface
module
Management bus
System-side
processing module
Service bus
Serial
management
bus
-48 V/-60 V
-48 V/-60 V
1.2 V
1.26 V
2.5 V
16 x E1 signals
Line-side
processing
module
3.3 V
Clock signals
Clock signals
Power supply
module
Clock module
Control module
Management bus
3.3 V
Active CXP
Standby CXP
CXP
CXP
To each module
To each module
Service bus
Service
bus
Service
bus
In Transmit Direction
The AND1ML1/AND1ML1A first distributes the signals in Ethernet packets from the backplane
to different protocol processing chips according to the service types. The system-side processing
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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