Front Panel - Huawei ATN 950B Hardware Description

ATN 950B Multi-service Access Equipment
Hardware Description
Figure 2-3 Block diagram for the working principle of the PIU
Surge protection failure alarm signals
Surge Protection and Failure Detection Module
This module protects the equipment against lightning and detects the failure of the anti-lightning
circuit. If the surge protection fails, the PIU reports the alarm signals to the AND1CXPA/
AND1CXPB.
Communication Unit Module
This module has the function of reporting the board manufacturing information, PCB version
information, and alarm signals about the surge protection failure.
Slot ID Module
This module reports the slot ID information to the AND1CXPA/AND1CXPB.
Board In-Position Module
This module reports the board in-position signals to the AND1CXPA/AND1CXPB.

2.2.4 Front Panel

On the front panel of the PIU, there are indicators, power supply interfaces, and a label.
Appearance of the Front Panel
Figure 2-4
Issue 03 (2012-07-23)
-48 V/-60 V
Communication unit
Surge protection and failure
detection module
Slot ID module
Board in-position module
shows the appearance of the front panel of the PIU.
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
module
Inter-board
communication bus
Board in-position
Slot ID signals
2 Power Supply System
Backplane
Each board
CXP
signals
CXP
CXP
12