20010 Faulty 8 kHz Clock Source from the Standby GGCU to the Backplane of the GSCU

Description

This alarm is reported when the 8 kHz clock source from the standby GGCU to the backplane of the GSCU is faulty.

Alarm ID	Alarm Severity	Alarm Type
20010	Minor	Fault

ID	Name	Meaning
1	Subrack No.	Subrack No.
2	Slot No.	Slot No.
3	Cpu No.	CPU No.
4	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".

If the switchover between the active and standby boards is not performed, the service will not be affected.
If the switchover between the active and standby boards are performed, the voice quality and the transmission of data service will be affected.

None.

The standby GGCU is not locked to the upper-level clock source. No clock source is input to the GSCU.
The standby GGCU is faulty.
The active GSCU is faulty.
The backplane is faulty.

Check whether the alarm is generated on both the active and standby GSCUs.
Y => The alarm is generated on both GSCUs. Go to 2.

N => The alarm is generated on only one GSCU. Go to 4.
Insert securely the standby GGCU and then check whether the alarm is cleared.
Y => The alarm is cleared. The alarm handling is complete.

N => The alarm is not cleared. Go to 3.
Replace the standby GGCU, wait until the new GGCU is successfully loaded, and then check whether the alarm is cleared.
Y => The alarm is cleared. The alarm handling is complete.

N => The alarm is not cleared. Please contact Huawei Customer Service Center.
Insert securely the GSCU and then check whether the alarm is cleared.
Y => The alarm is cleared. The alarm handling is complete.

N => The alarm is not cleared. Go to 5.
Check whether the active board reports the alarm.
Y => The active board reports the alarm. Go to 6.

N => The standby board reports the alarm. Go to 7.
Perform switchover between the active and standby GSCUs. Wait until the standby GSCU is successfully restarted, and then check whether the alarm is cleared.
Y => The alarm is cleared. The alarm handling is complete.

N => The alarm is not cleared. Go to 7.
Replace the faulty standby GSCU and wait until the new board is successfully loaded and reset. Check whether the alarm is cleared.
Y => The alarm is cleared. The alarm handling is complete.

N => The alarm is not cleared. Please contact Huawei Customer Service Center.