Working Principle And Signal Flow - Huawei ATN 950B Hardware Description

ATN 950B Multi-service Access Equipment
Hardware Description
Function and Feature
Tact switches
NOTE

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
Figure 4-1 Block diagram for the functions of the AND1CXPA/AND1CXPB
Time input/output
Service Processing and Grooming Module
This module performs the following functions:
Issue 03 (2012-07-23)
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.
shows the block diagram for the working principle of the AND1CXPA/AND1CXPB.
NM network
interface/serial
interface
interface
Auxiliary
Clock input/output
interface
interface
module
Alarm input/output
interface
Clock
signals
Clock
processing
module
Under-voltage/over-
voltage detection bus
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4 AND1CXPA/AND1CXPB - System Control, Cross-
Description
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.
System control
NM
communication
NM
CPU control
serial interface
Management
bus
Time
signals
Logic control
Time signals
Clock signals
Service processing and
grooming module
Power supply
module
connect, and Multi-protocol Process Unit
NM pass-through
module
Active/standby board
communication bus
unit
Serial
management bus
unit
Management
bus
Service signals
Service
communication bus
-48V/-60V
-48V/-60V
12V
3.3V
Back plane
The other CXP
The other CXP
PICs
PICs
The other CXP
System
power supply
System
power supply
FAN
Interface cards
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