20357 EIU/OIU Time slot loopback alarm

Description

The EIU/OIU timeslot is in the Loopback state.

Alarm ID	Alarm Severity	Alarm Type
20357	Warning	Fault

ID	Name	Meaning
1	Subrack No.	Subrack No.
2	Slot No.	Slot No.
3	Cpu No.	CPU No.
4	Link No.	Number of the E1 or T1 link on which the timeslot loop alarm is generated
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".

The communication on the timeslot is disconnected.

None

The timeslot is in loopback state.

Check which ports are set in the TDM timeslot loopback mode.
Y => The loopback is set. Go to 2.

N => The loopback is not set. Go to 3.
Disable the setting of TDM timeslot loopback setting on the port, and 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.
Reset the faulty board. After the board is restarted, check whether the alarm is cleared.
Y => The alarm is cleared. The alarm handling is complete.

N => The alarm is not cleared. Go to 4.
Replace the faulty board. After the new board is restarted, 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.