20239 Loss of Tributary Unit Multi-frames (TULOM)

Description

Tributary unit loss Of Multiframe

Alarm ID	Alarm Severity	Alarm Type
20239	Major	Fault

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	High Order Path No.	High Order Path No.
6	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".

The service carried on the faulty optical fiber is interrupted.

None.

Check whether there is any alarm associated with the Optical Port, for example, 20226 Regenerator Section Signal Failure (RSF), 20227 Regenerator Section Signal Deteriorated (RSD), 20236 High-Order Path Signal Failure (HPSF), and 20237 High-Order Path Signal Deteriorated (HPSD).
Y => An alarm exists. Go to 2.

N => No alarm exists. Go to 3.
Clear the BER alarm according to its relevant handling suggestions, and then check whether the multi-frame loss alarm is cleared.
Y => The alarm is cleared. The alarm handling is complete.

N => The alarm persists. Go to 3.
Replace the local board and wait until the new board is successfully restarted. Check whether the alarm is cleared.
Y => The alarm is cleared. The alarm handling is complete.

N => The alarm persists. Go to 4.
Replace the peer board and wait until the new board is successfully restarted. 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.