293 GB BC Faulty

Description

BC is a binding of E1's some slots for transferring service data and signaling data. This alarm is reported when the Gb interface is broken, the configuration of Gb interface is faulty, or the BC is blocked.

Attribute

Alarm ID	Alarm Severity	Alarm Type
293	Critical	Fault

Parameters

ID	Name	Meaning
1	Subrack No.	Subrack No. of the GEPUG where the alarm is generated
2	Slot No.	Slot No. of the GEPUG where the alarm is generated
3	PortNo.	Port No. of the GEPUG where the alarm is generated
4	BC No.	ID of the BC where the 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".

Impact on the System

If no backup BC is configured, then the data service in the related cells will be interrupted;
If a backup BC is configured, then the data service in the related cells can be performed, but the service capacity goes down.

System Actions

None

Possible Causes

The Gb interface is broken;
The configuration of the Gb interface is incorrect;
The BC is blocked.

Procedure

Check whether the E1 cable between the BSC and the SGSN is correct;
Y => Go to 2;

N => Connect BSC and SGSN again.
On the local maintenance terminal of BSC and SGSN, separately run the MML command LST BC. Check whether the configurations include subrack No., slot No., port No., BC ID, TimeslotMask of BSC and SGSN are the same;
Y => Same, Go to 3;

N => Different, Go to 4;
On the local maintenance terminal of BSC, run the MML command DSP BC. Check whether the BC is blocked;
Y => Blocked, run the UBL BC to unblock the BC;

N => Unblocked, contact Huawei Customer Service Center.
On the local maintenance terminal of BSC, right-click the GEPUG that incurs an alarm and then choose Configure BC. Reconfigure the BC of Gb interface, make sure that the timeslot of BSC and SGSN is identical.