Huawei ATN 950B - Working Principle and Signal Flow

Function and Feature Description
Tact switches Provides two tact switches. When you rotate the ejector levers
to remove the board, the two tact switches are triggered to
start the active/standby protection switching.
NOTE
When you rotate only one ejector lever, the protection switching is not triggered. The protection switching
is triggered only when you rotate the two ejector levers.
4.3 Working Principle and Signal Flow
The AND1CXPA/AND1CXPB mainly consists of the service processing and grooming module,
system control module, clock processing module, auxiliary interface module, and power supply
module.
Figure 4-1 shows the block diagram for the working principle of the AND1CXPA/AND1CXPB.
Figure 4-1 Block diagram for the functions of the AND1CXPA/AND1CXPB
Auxiliary
interface
module
Clock input/output
interface
NM network
interface/serial
interface
Alarm input/output
interface
Clock
processing
module
System control
module
Service processing and
grooming module
NM
communication
Service signals
Power supply
module
-48V/-60V
12V
3.3V
System
power supply
FAN
Interface cards
Under-voltage/over-
voltage detection bus
CPU control
unit
Logic control
unit
NM
serial interface
Active/standby board
communication bus
Management
bus
Management
bus
Time
signals
Service
communication bus
The other CXP
NM pass-through
PICs
-48V/-60V
Time input/output
interface
Time signals
Clock signals
Back plane
Clock
signals
The other CXP
PICs
The other CXP
System
power supply
Serial
management bus
Service Processing and Grooming Module
This module performs the following functions:
ATN 950B Multi-service Access Equipment
Hardware Description
4 AND1CXPA/AND1CXPB - System Control, Cross-
connect, and Multi-protocol Process Unit
Issue 03 (2012-07-23) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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