ALM-2198 Phase-lock Loop Critical Alarm

Description

The alarm is triggered when neither phase-lock loop in a TRX is available.

Attribute

Alarm ID Alarm Severity Alarm Type
2198 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.

135:TRX
3 Board No.

Number of the fault board

0:TRX 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

The TRX cannot work normally upon occurrence of this alarm.

System Actions

None.

Possible Causes

  • The TRX is damaged.
  • The TDU is damaged.
  • The TMU is damaged.
  • The cable connected with the backplane of the TRX is loose or damaged.
  • The backplane is damaged.

Procedure

  1. Check whether the TRX is faulty

    Replace the TRX and check whether the alarm is cleared.

    Y=> The alarm handling ends.

    N=> Go to Step 2.

  2. Check whether the TDU is faulty

    Check whether such correlated alarms as ALM-2166 TRX Clock Prompt Alarm, ALM-2136 Test Phase-Lock Loop Alarm, ALM-2118 TRX Software Running Abnormal Alarm and ALM-2204 TRX Communication Alarm exist in the alarm management system. If yes, replace the TDU and check whether the original alarm is cleared.

    Y=> The alarm handling ends.

    N=> Go to Step 3.

    If no such alarms are reported, go to Step [3].

  3. Check whether the TMU is faulty

    Replace the active and standby TMUs. Check whether the alarm is cleared.

    Y=> The alarm handling ends.

    N=> Go to Step 4.

  4. Check whether the cable connected with the backplane is loose or damaged

    Remove and re-insert the cable or replace it with a normal one. Check whether the alarm is cleared

    Y=> The alarm handling ends.

    N=> Go to Step 5.

  5. Check whether the backplane is faulty

    Replace the TRB and CMB. Check whether the alarm is cleared.

    Y=> The alarm handling ends.

    N=> Huawei Customer Service Center.

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