ALM-3822 IASU Communication alarm

Description

This alarm is triggered when the communications between the IASU with IOMU are interrupted.

Attribute

Alarm ID Alarm Severity Alarm Type
3822 Minor 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.

85:IASU
3 Board No.

Number of the fault board

0:IASU
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

9: BTS3002C
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 the alarm occurs, the IOMU cannot manage or maintain the IASU.

System Actions

None.

Possible Causes

  • The configuration data of the MCU includes IASU data but actually the MCU does not contain IASU.
  • The IASU cannot work normally or has been reset.
  • The CBUS is unstable.

Procedure

  1. Check whether the IASU has been installed

    Check whether the three indicators TRUN, OPTW and OPTE in the MCU maintenance cavity are off.

    Y=> No IASU is installed while the MCU data includes IASU data. Go to Step 2.

    N=> Go to Step 3.

  2. Delete the IASU data

    Delete the IASU data, wait until the configuration data takes effect, check whether the alarm is cleared.

    Y=> The alarm handling ends.

    N=> Go to Step 3.

  3. Check the running status of the IASU software

    Check whether the TRUN indicator in the IASU maintenance blinks at one Hz. Reset the MCU and check whether the alarm is cleared.

    Y=> The alarm handling ends.

    N=> Record the state of the TRUN and please contact Huawei Customer Service Center.

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