20977 Failure of High-Speed Communication Link on the Backplane of Service Boards

Description

Back Broad GE Link Down of Interface Broad

Attribute

Alarm ID Alarm Severity Alarm Type
20977 Major Fault

Parameters

ID Name Meaning
1 Subrack No.

The number of the subrack

2 Slot No.

The number of the slot

3 CPU No.

The number of the CPU

4 Link No.

0=link connected with the 7th slot GSCU,1=link connected with the 6th slot GSCU

5 Alarm Attribute

0=Normal, Alarms period are longer than the Transient Threshold.

1=Transient Count, The times and the period of the alarms whose periods are shorter than the Transient Threshold are summed up. If the sum result is longer than the Alarm Occurrence Period Threshold or Alarm Occurrence Times Threshold, an alarm so called Transient Count Alarm is triggered. Because Transient Count Alarm is based on accumulative result, the recovery of the alarm may occur at least one Summing Cycle later. The Summing Cycle can be query by MML "LST STATSLDWIN".

Impact on the System

The communication with the backplane is disconnected.

System Actions

If the other GE link is normal, the service is switched to the normal GE link.

Possible Causes

The GE link for the backplane of the interface board is faulty.

Procedure

  1. Check whether the SCU board is in position.


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