20226 Regenerator Section Signal Failure (RSF)

Description

The optical interface enters failed status when the bit error rate(BER) of the regenerator section exceeds the threshold 1E-3, and quits faild status when the bit error rate(BER) of the regenerator section less than the threshold 1E-4.

Attribute

Alarm ID	Alarm Severity	Alarm Type
20226	Major	Fault

Parameters

ID	Name	Meaning
1	Subrack No.	Subrack No.
2	Slot No.	Slot No.
3	Cpu No.	CPU No.
4	Optical Interface No.	Optical interface No.
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 quality of the services carried on the affected optical cable degrades, or the services stop.

System Actions

Handling of the active board in the active/standby operation mode: Perform the switchover if the standby is ready for the operation.
Handling of the standby board in the active/standby operation mode: None.
Handling of the board in the Independent operation mode: None.

Possible Causes

The transport link is faulty.
The optical interface on the local board is faulty.

Procedure

Contact the maintenance engineers who are responsible for maintaining the transmission network and confirm with them whether the transmission network has problems.
Y => The transmission network has problem. Ask the maintenance engineers to solve the problems. The alarm handling is complete.

N => The transmission network is working normally. Go to 2.
Replace the faulty board on the BSC side. Wait until the new board starts up and loads data successfully, check whether the alarm is cleared.
Y => The alarm is cleared. The alarm handling is complete.

N => The alarm persists. Please contact Huawei Customer Service Center.