ALM-2560 PBU VSWR Alarm

Description

This alarm is triggered when the voltage standing wave ratio (VSWR) is excessive due to mismatch of PBU output load.

Attribute

Alarm ID Alarm Severity Alarm Type
2560 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.

147:PBU
3 Board No.

Number of the fault board

0:PBU 0
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 or module is located

3: BTS30

5: BTS312

10: BTS3012A

11: BTS3006A
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

When this alarm occurs, the output power of the PBU decreases, thus leading to shrinkage of cell coverage scope.

System Actions

None.

Possible Causes

  • The cables connecting the PBU and the ECDU/EDU are adjusted manually.
  • The cables connecting the PBU and the ECDU/EDU are damaged, or the connectors are in poor contact or not connected at all.
  • The PBU is damaged.
  • The ECDU/EDU is damaged.

Procedure

  1. Reset the PBU

    Reset the PBU on the LMT or local BTS maintenance system. View whether the alarm is cleared.

    NOTE:

    This alarm occurs even if the manual adjustment for the cables between the PBU and the ECDU/EDU is correct, and the alarm will not be cleared until the PBU is reset.

    Y=> The alarm handling ends.

    N=> Go to Step 2.

  2. Check the cables between the PBU and the ECDU/EDU

    Check whether the cables connecting the PBU and the ECDU/EDU are damaged, and whether the connectors are in well contact by reconnecting/replacing the cables. Reset the PBU after the reconnection/replacement. View wether the alarm is cleared.

    Y=> The alarm handling ends.

    N=> Go to Step 3.

  3. Replace the PBU

    Replace the PBU if faulty. View whether the alarm is cleared.

    Y=> The alarm handling ends.

    N=> Go to Step 4.

  4. Replace the ECDU/EDU

    Replace the ECDU/EDU connected to the PBU. View whether the alarm is cleared.

    Y=> The alarm handling ends.

    N=> Please contact Huawei Customer Service Center.

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