Front Panel - Huawei ATN 950B Hardware Description

ATN 950B Multi-service Access Equipment
Hardware Description
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System Control Module
This module mainly consists of the CPU control unit and logic control unit, which perform the
following functions:
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Clock Processing Module
This module performs the following functions:
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Auxiliary Interface Module
This module performs the following functions:
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Power Supply Module
This module performs the following functions:
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4.4 Front Panel

On the front panel of the AND1CXPB, there are indicators, buttons, switch for the ejector lever,
and interfaces.
Issue 03 (2012-07-23)
Grooms services with switching capacity.
Supports automatic switching and manual switching of the active and standby boards.
The CPU control unit works with the logic control unit to detects alarms and hardware
faults, control boards, process overhead, and manage the equipment.
The logic control unit provides interfaces through which the CPU control unit connects to
other chips on the board. The logic control unit specifies the working states of chips,
initializes chips, and operates the register. In addition, the logic control unit achieves log
control on active/standby switching, monitors the working state of the board, and detects
the states of other boards.
Provides working clock signals for the key chips on the AND1CXPA/AND1CXPB.
Supports the physical-layer clock synchronization, and provides system clock signals for
each boards.
Processes the IEEE 1588V2 protocol to achieve clock/time synchronization.
Supports the 1588 ACR clock.
Supports the NTP clock.
Provides one NM Ethernet interface or console interface.
Provides one time input/output interface and one time input/output interface.
Reserves one alarm input/output interface.
Accesses two -48 V DC/-60 V DC power supplies.
Detects and reports overvoltage and undervoltage of two input power supplies.
Supplies 12 V power for the FAN board.
Supplies 3.3 V working power for the local board and the PIC boards in a centralized
manner.
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4 AND1CXPA/AND1CXPB - System Control, Cross-
connect, and Multi-protocol Process Unit
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