ALM-5310 EDU TTA Alarm

Description

This alarm is triggered when both the software switch and the hardware switch of the EDU TTA are turned on, and the current for the EDU TTA exceeds the specified range (nominal value 50-165mA).

Attribute

Alarm ID Alarm Severity Alarm Type
5310 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.

66:DDPU(EDU)

3 Board No.

Number of the fault board

0:EDU 0

1:EDU 1

4 PassNo

Number of the passage where the faulty board is located.

5 SubLink No.

Alarm sub-category number

0: EDU port 0

1: EDU port 1

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, the TTA configured for the EDU receiving channel works abnormally, and the receiving channel corresponding to the faulty channel is less sensitive than before, but the BTS can still work normally.

System Actions

None.

Possible Causes

  • The power supply circuit of the EDU TTA is abnormal.
  • The TTA configured for the EDU works abnormally.
  • The feeders between the EDU antenna port and the TTA are abnormal, including jumpers, feeders, lightning arresters and so on.
  • The EDU alarm circuit is abnormal.

Procedure

  1. Check the voltage of the power supply for the TTA at the EDU antenna port.

    Remove the communication cable of the serial port on the faulty EDU in normal power-on state. Stop the power transmission of the TRX corresponding to the faulty EDU. Remove the jumper at the antenna port on the cabinet top. Measure the DC voltage between the inner conductor (positive) and the outer conductor with a multimeter at the EDU antenna port to see whether the read is within the range from +11V to +13V.

    NOTE:

    Stop the power transmission of the corresponding TRX before disconnecting the jumper between the EDU antenna port and the TRX input port.

    Y=> The voltage is normal. Go to Step 2.

    N=> The voltage is abnormal. Go to Step 3.

  2. Check jumpers and feeders

    At the one end of a jumper removed, measure the voltage between the inner conductor and the outer conductor with a multimeter to see whether they are short-circuited.

    Y=> Check the antenna feeder segment by segment.

    N=> Go to Step 3.

  3. Replace the EDU

    Replace the EDU and view whether the alarm is cleared.

    Y=> The alarm handling ends.

    N=> Go to Step 4.

  4. Replace the TTA

    Replace the TTA and view whether the alarm is cleared.

    Y=> The alarm handling ends.

    N=> Please contact Huawei Customer Service Center


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