425 Trx Passage Mutual Aid in a Cell

Description

This alarm is reported when the access binded with primary BCCH is switched to another TRX because the TRX carrying the primary BCCH is faulty. The BCCH mutual aid ensures that the disrupted services in a cell are restored within a short period of time.

Attribute

Alarm ID	Alarm Severity	Alarm Type
425	Major	Event

Parameters

ID	Name	Meaning
1	Cell Index.	Index of the cell where TRX passage mutual aid occurs.
2	Cell Name	Name of the cell where TRX passage mutual aid occurs.
3	Cell CGI	Cell Global Identifier of the cell where TRX passage mutual aid occurs.
4	Site No.	Number of the site where the cell generating an alarm is located
5	Site Name	Name of the site where the cell generating an alarm is located
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".

Impact on the System

The service in the cell is interrupted for a short period, and restored after mutual aid.

System Actions

The BTS selects a valid passage to bind the BCCH TRX.

Possible Causes

A fault occurs on the passage where the BCCH TRX is initially configured.

Procedure

Check whether the primary BCCH is normal.

Y => Replace the former TRX carrying the primary BCCH. The alarm handling is complete.

N => Please contactHuawei Customer Service Center to Replace the faulty TRX.