4158 DBUS alarm

Description

The alarm is reported when the Carrier Module hardware detects that the data bus (DBUS) sent from the main control module is lost.

Attribute

Alarm ID Alarm Severity Alarm Type
4158 Major Fault

Parameters

ID Name Meaning
1 Site No.

Number of the site where the faulty board or module is located

Value range: 0-2047
2 Board Type

Number of the type which the faulty board belongs to.

65:DTRU/GTRU/DDRM

88:DRRU

92:DRFU

96:MRRU

100:MRFU

101:GRFU

102:GRRU

151:QTRU
3 Board No.

Number of the fault board
4 PassNo

Number of the passage where the faulty board is located.
5 SubLink No.

Alarm sub-category number

255:None
6 Cell Index

Index of the cell where the board or module is located

0-2047: Cell index of the faulty cell in the data configuration

65535: None
7 Site Type

Type of the site where the faulty board is located.

12:BTS3012;

13:BTS3006C;

14:BTS3002E;

15:BTS3012AE;

16:BTS3012 II;

17:DBS3900 GSM;

18:BTS3900 GSM;

19:BTS3900A GSM;
8 RackNo

Number of the rack where the faulty board is located.
9 BoxNo

Number of the subrack where the faulty board is located.
10 SlotNo

Number of the slot where the faulty board is located.
11 Site Name

Site Name
12 Alarm Attribute

Alarm Character

0:Normal

1:Transient Count

Impact on the System

All the services of the DTRU will be interrupted upon occurrence of this alarm.

System Actions

  • When this alarm occurs, the system shuts off the power amplifier automatically.
  • For the DTRU of main BCCH, DTRU mutual aid is started.

Possible Causes

  • Faulty E1 transmission link
  • Faulty DBUS in the rack
  • Faulty DTMU

Procedure

  1. Check other relevant alarms.

    Check if E1 Local Alarm exists on LMT.

    Y=> if exist, handle it according to the corresponding handling suggestions, check if the alarm is cleared.The alarm is cleared. Alarm handling is completed. The alarm is not cleared. Go to Step 2.

    N=> if not, Go to Step 2.

  2. Check if the DIP switches of the main controlling module are set properly
    1. if the DIP switches of the main controlling module are set properly.

      Ensure that only one end of the E1 cable is grounded, and see if the alarm is cleared.

      Y=> The alarm is cleared. Alarm Handling is completed.

      N=> The alarm is not cleared. Go to Step 3.

    2. if the DIP switches of the main controlling module are not set properly.

      Modify the setting to ensure that only one end of the E1 cable is grounded, and see if the alarm is cleared.

      Y=> The alarm is cleared. Alarm Handling is completed.

      N=> The alarm is not cleared. Go to Step 3.

  3. Replace the main controlling module.

    Replace the main controlling module and see if the alarm is cleared.

    Y=> The alarm is cleared. Alarm Handling is completed.

    N=> The alarm is not cleared. The fault may lie in distribution cables of the rack fault.

    Please contact Huawei Customer Service Center.

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