ALM-9686 PBU Clock Critical Alarm

Description

This alarm is triggered when the PBU detects both master clock alarm and slave clock alarm.

Attribute

Alarm ID Alarm Severity Alarm Type
9686 Major Fault

Parameters

ID Name Meaning
1 Site No.

Number of the site where the faulty board or module is located

Value range: 0-2047
2 Board Type

Number of the type which the faulty board belongs to.

147:PBU
3 Board No.

Number of the fault board

0:PBU 0
4 PassNo

Number of the passage where the faulty board is located.
5 SubLink No.

Alarm sub-category number

255:None
6 Cell Index

Index of the cell where the board or module is located

0-2047: Cell index of the faulty cell in the data configuration

65535: None
7 Site Type

Type of the site where the faulty board is located.

12:BTS3012;

13:BTS3006C;

14:BTS3002E;

15:BTS3012AE;

16:BTS3012 II;
8 RackNo

Number of the rack where the faulty board is located.
9 BoxNo

Number of the subrack where the faulty board is located.
10 SlotNo

Number of the slot where the faulty board is located.
11 Site Name

Site Name
12 Alarm Attribute

Alarm Character

0:Normal

1:Transient Count

Impact on the System

When this alarm occurs, the corresponding PBU cannot work normally.

System Actions

None.

Possible Causes

  • The TDU is damaged.
  • The TMU is damaged.
  • The TRX is damaged.
  • The cable connecting the backplane of the TRX is loose or damaged.
  • The backplane is damaged.

Procedure

  1. Check whether the TDU is faulty

    Check whether there are such correlated alarms as ALM-4154 TRX main clock alarm, ALM-4124 TRX Hardware Prompt Alarm, ALM-4106 TRX Software Running Abnormal Alarm, ALM-4192 TRX communication alarm, ALM-9682 PBU Main Clock Alarm and ALM-9684 PBU Slave Clock Alarmon the alarm management system. Replace the TDU if any. View whether the original alarm is cleared.

    Y=> The alarm handling ends.

    N=> Go to Step 2.

  2. Replace the TMU

    Replace the active and standby TMUs. Check whether the alarm is cleared.

    Y=> The alarm handling ends.

    N=> Go to Step 3.

  3. Replace the PBU

    Replace the PBU and check whether the alarm is cleared.

    Y=> The alarm handling ends.

    N=> Go to Step 4.

  4. Check whether the cable connecting the backplane is loose or damaged

    Remove and re-insert the cable, or replace it with a proper one if necessary. Check whether the alarm is cleared.

    Y=> The alarm handling ends.

    N=> Go to Step 5.

  5. Replace the backplanes

    Replace the TRB and the CMB. View whether the alarm is cleared.

    Y=> The alarm handling ends.

    N=> Please contact Huawei Customer Service Center.

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