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OSN3500_HuaweiSDH Transmission Equipment The IN_PWR_ABN alarm is reported due to the poor contact between the pin in the optical module that is specifically responsible for transmitting the optical power detection data and the veneer, which results in abnormal input optical power. Troubleshoot the fault by re-plugging the optical module.
OptiX OSN 3500
OptiX OSN 3500
Fault Category
- IN_PWR_ABN
- Docking Failure
Phenomenon Description
The IN_PWR_ABN alarm is reported on some optical ports of the optical interface board, and the network management shows that the received optical power value of these ports is too large.
Explanation:
Normally, when the optical module is not plugged in properly or when the optical module fails, the optical port reports the laser not installed alarm LSR_NO_FITED; however, this case does not report the LSR_NO_FITED alarm, but reports the IN_PWR_ABN alarm.
Cause Analysis
The possible causes are as follows:
- The received optical power is too high.
- Single board optical interface failure.
- Receive optical detection circuit failure of the optical interface board.
- Poor contact between the optical module and the single board.
- Optical module failure.
Operation steps
- Check the IN_PWR_ABN alarm on the network management, and determine the optical port number of the alarm according to the alarm parameters, and set the optical port as A, and the optical module inserted on the optical port as C. First, use an optical power meter to measure the received optical power value of the A optical port, which shows normal, then exclude the possibility of excessive received optical power.
- First of all, use the optical power meter to measure the received optical power value of optical port A. If the display is normal, the possibility of excessive received optical power is ruled out.
- Unplug the optical module C and insert it into the optical port B. The optical port B does not report IN_PWR_ABN alarm, so the possibility of optical module C failure is ruled out.
- Re-insert optical module C into optical port A, optical port A does not report IN_PWR_ABN alarm, and the input optical power is back to normal, which determines that the optical module has poor contact with the veneer.
The technical information in this chapter and the related SDH equipment troubleshooting procedures are provided by Shenzhen Optical Transmission Network Technology Co. Huawei SDH optical transmission equipment, SDH transmission equipment sales phone: 13430988088 Welcome to telephone consultation!
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