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TDM Link Alarms on BSC690...

TDM Link Alarms on BSC6900

Created: Oct 5, 2021 11:43:41Latest reply: Nov 23, 2021 16:57:07 363 7 4 0 1
  Rewarded HiCoins： 0 (problem resolved)
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Hi,


Need your suggestion on it please.


Problem Statement:

We are observing the following TDM related alarms on one of our BSCs. The alarms restores iteself after some times and reappears agains.


Action Taken:

We have replaced both local and peer end boards as well (TNUa & DPUc). But again, aftter few days the alarms started to reapparing.


Alarms:

NameNE TypeAlarm SourceMO   NameLocation   Information
TDM Link Between TDM Switching Board and Service Board FaultyBSC6900   GSMBSC7Slot No.=5, Subrack No=2, Subsystem No.=0Subrack No.=2, Slot No.=5, Subsystem No.=0, Peer Slot No.=27
TDM Link Between TDM Switching Board and Service Board FaultyBSC6900   GSMBSC7Slot No.=5, Subrack No=2, Subsystem No.=0Subrack No.=2, Slot No.=5, Subsystem No.=0, Peer Slot No.=26
TDM Link Between TDM Switching Board and Service Board FaultyBSC6900   GSMBSC7Slot No.=26, Subrack No=2, Subsystem No.=0Subrack No.=2, Slot No.=26, Subsystem No.=0, Peer Slot No.=5
Active TDM Link Fault Between TDM Switching Board and Service   BoardBSC6900   GSMBSC7Slot No.=5, Subrack No=2, Subsystem No.=0Subrack No.=2, Slot No.=5, Subsystem No.=0, TDM link group   No.=0, Peer Board Slot No. 1=27, Peer Board Slot No. 2=26


Any suggestions?


bsc6900

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gzzz
Admin Created Oct 9, 2021 03:48:39

Hello, friend.

Possible causes:

Failure of this single board. Fault on the opposite end of the single board. This single board is not plugged in tightly. The opposite end of the board is not plugged in tightly. The clock output from the SCU single board to the service single board is faulty. Faulty backplane.

correction action:

Remote processing: step1 Check if the opposite end of the board is in place. step2 Clock troubleshooting. step2.1 Check if [ALM]20204[/ALM] is present. step2.2 Determine if the alarm is restored. step3 Single board connection troubleshooting. step3.1 Plug in this board. step3.2 Determine if the alarm is restored. step3.3 Plug in the opposite end of the board. step3.4 Determine if the alarm is restored. step4 Single board software troubleshooting. step4.1 Reset this board. step4.2 Determine if the alarm is restored. Step3.4 Determine if the alarm is restored. step4 Software fault handling for a single board. step4.1 Reset this board. step4.2 Determine if the alarm is restored. step4.3 Reset the opposite board. step4.4 Determine if the alarm is restored. step4.5 Determine if the alarm is restored. step4.6 Determine if the alarm is restored. step4.7 Determine if the alarm is restored. step4.8 Determine if the alarm is restored.

Near-end processing: step1 Replace the local board. step1.1 Replace the local board. step1.2 Determine if the alarm is restored. step2 Replace the opposite board. step2.1 Replace the opposite board. step2.2 Determine if the alarm is restored. step2.3 Reset the local board. step2.4 Determine if the alarm is restored. step3 Check if the local frame step4 Power down the frame. step4.1 Power down the frame. step4.2 Determine if the alarm is restored. step5 Contact technical support.

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Chenxintao
Chenxintao Admin Created Oct 5, 2021 11:47:40

Hello, dear!
It's nice to meet you in the community.
We're working on your problem. Please be patient.

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3#
SamB
SamB Created Oct 5, 2021 11:50:03

Open Service Request & Consult with Huawei GTAC as you have already replaced both boards :)
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4#
umaryaqub
umaryaqub MVE Created Oct 6, 2021 07:31:35

Have you tried to check the physical media connecting both boards? Some times lose connections/connectors can also cause this.
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faysalji
faysalji Created Oct 7, 2021 11:48:55 (1) (0)
Yes, you are right, did that too but it reappeared  
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5#
faysalji
faysalji Author Created Oct 7, 2021 11:47:59

Yes, you are right, did that too but it reappeared
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6#
gzzz
gzzz Admin Created Oct 9, 2021 03:48:39

Hello, friend.

Possible causes:

Failure of this single board. Fault on the opposite end of the single board. This single board is not plugged in tightly. The opposite end of the board is not plugged in tightly. The clock output from the SCU single board to the service single board is faulty. Faulty backplane.

correction action:

Remote processing: step1 Check if the opposite end of the board is in place. step2 Clock troubleshooting. step2.1 Check if [ALM]20204[/ALM] is present. step2.2 Determine if the alarm is restored. step3 Single board connection troubleshooting. step3.1 Plug in this board. step3.2 Determine if the alarm is restored. step3.3 Plug in the opposite end of the board. step3.4 Determine if the alarm is restored. step4 Single board software troubleshooting. step4.1 Reset this board. step4.2 Determine if the alarm is restored. Step3.4 Determine if the alarm is restored. step4 Software fault handling for a single board. step4.1 Reset this board. step4.2 Determine if the alarm is restored. step4.3 Reset the opposite board. step4.4 Determine if the alarm is restored. step4.5 Determine if the alarm is restored. step4.6 Determine if the alarm is restored. step4.7 Determine if the alarm is restored. step4.8 Determine if the alarm is restored.

Near-end processing: step1 Replace the local board. step1.1 Replace the local board. step1.2 Determine if the alarm is restored. step2 Replace the opposite board. step2.1 Replace the opposite board. step2.2 Determine if the alarm is restored. step2.3 Reset the local board. step2.4 Determine if the alarm is restored. step3 Check if the local frame step4 Power down the frame. step4.1 Power down the frame. step4.2 Determine if the alarm is restored. step5 Contact technical support.

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Mohamed_Ahmed
Mohamed_Ahmed Created Nov 23, 2021 16:57:07

good
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