ALM-7512 E1/T1 Outboard Alarm

Description

This alarm is triggered when T_ALOS (analog signal loss) or E1_LOS (line signal loss) occurs to the 2M interface of the TEU.

Attribute

Alarm ID Alarm Severity Alarm Type
7512 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.

68:DASU（TEU）
3 Board No.

Number of the fault board

0:TEU 0
4 PassNo

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

Alarm sub-category number

Value range:00?07.
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.

3:BTS30;

5:BTS312;

10:BTS3012A;

11:BTS3006A;

12:BTS3012;

13:BTS3006C;

14:BTS3002E;

15:BTS3012AE;

16:BTS3012 II;
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, services over the corresponding E1 channels are interrupted.

System Actions

None.

Possible Causes

  • E1 distribution cable connecting TEU, TDU and TMU or that from TEU to other devices is faulty.
  • The board connecting TEU tributary interface fails to send E1 signals properly.
  • TEU tributary interface circuit fails.

Procedure

  1. Check TEU tributary interfac circuit

    At the corresponding tributary port, perform self-loop test for the TEU with E1 self-loop cable. Log onto the the TEU with transmission NM. Double click the icon of the TEU to display the Board Position diagram. Click the [Function] pull-down menu in the diagram and select "Query Current Alarm", and then select "View Current Alarm" to display all alarms occuring to the TEU. Check whether there are the T_ALOS (Analog Signal Loss) alarm or the E1_LOS (Line Signal Loss) alarm. Replace the TEU if any. View whether the alarm is cleared.

    Y=> The alarm handling ends.

    N=> Go to Step 2.

  2. Check the E1 cable from the TEU to the TDU

    Check whether the E1 cable connecting the alarming tributary port is in correct connection, and whether E1 transmission performance is normal. Correct the connection or replace the E1 cable if necessary.

    Y=> The alarm handling ends.

    N=> Go to Step3.

  3. Check whether the TMU tributary sends E1 signals correctly.

    Replace the TMU and view whether the alarm is cleared.

    Y=> The alarm handling ends.

    N=> Huawei Customer Service Center.

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