ALM-3426 TX_PLL_0 alarm

Description

This alarm is triggered when the BTS3001C clock module becomes invalid, or the MTR phase-lock loop is damaged.

Attribute

Alarm ID Alarm Severity Alarm Type
3426 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.

82:MCI
3 Board No.

Number of the fault board

0:MCI0

1:MCI1
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

7: BTS3001C-108/BTS3001C-116

8: BTS3001C-204
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 services supported by the local BTS3001C are interrupted upon the occurrence of this alarm.

System Actions

  • The system shuts off the power amplifier upon occurrence of this alarm.

Possible Causes

  • The MMU clock (13M clock) module becomes invalid.
  • The clock cable between the MTR and the MMU is disconnected.
  • The frequency configuration is incorrect (the GSM900M BTS is configured with a frequency of DCS1800M).
  • The MTR module is damaged.

Procedure

  1. Check whether there are any correlated alarms

    Check whether there is a ALM-3172 MMU Clock alarm on the LMT.

    Y=> Handle the ALM-3172 MMU Clock alarm according to the corresponding handling suggestions. Check whether the alarm is cleared.The alarm is cleared, Alarm handling is completed. The alarm is not cleared, Go to Step 2.

    N=> Go to Step 2.

  2. Check the BSC data configuration

    Check the BSC data configuration.Check whether the Assigned Frequency in the Set Frequency tab belongs to the GSM900M frequencies.

    Y=> The frequency configuration is correct. Go to Step 3.

    N=> The frequency configuration is incorrect. Change the frequency configuration to a valid frequency of the GSM900M system. Go to Step 3.

  3. Reset the BTS

    Perform fourth-level reset on the BTS3001C through the LMT. Check whether the alarm is cleared.

    Y=> The alarm handling ends.

    N=>Please contact Huawei Customer Service Center to replace the faulty inner container hardware.

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