20086 E1/T1 Link Loopback

Description

A port of the local equipment is in loopback mode.

Attribute

Alarm ID Alarm Severity Alarm Type
20086 Warning Fault

Parameters

ID Name Meaning
1 Subrack No.

Subrack No.
2 Slot No.

Slot No.
3 Cpu No.

CPU No.
4 Port No.

The number of the port
5 Loopback Type

1=No loop,2=Payload loop,3=Remote loop,5=Local loop,7=Single channel loop
6 Site No.

The IDs of all sites whose OMLs are on the faulty E1/T1. If BTS are cascade connected,a maximum of 4 sites are shown.Only Abis E1/T1 alarm has this parameter.
7 Site Name

The Names of all sites whose OMLs are on the faulty E1/T1. If BTS are cascade connected,a maximum of 4 sites are shown.Only Abis E1/T1 alarm has this parameter.
8 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

  • If the local equipment is in loopback mode, the AIS alarm occurs in the remote equipment.
  • The services on the port are disrupted.

System Actions

None.

Possible Causes

The E1/T1 link of the local equipment is manually set to one loopback mode at will.

Procedure

  1. Check whether a loopback test is performed on the link.

    Y => This is a normal symptom. The alarm handling is complete.

    N => Go to 2.

  2. Stop the loopback of the alarm link through the LMT to make the alarm link operate in normal state, 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.

Parent topic: BSC Alarm Reference
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