Hello everyone!
I will share with you about the BEFFEC_EXC minor alarm handling.
BEFFEC_EXC is an alarm in which Forward Error Correction (FEC) signals are degraded.
The service transmission performance is affected.
The BEFFEC alarm can have the following possible causes:
A higher-level alarm, such as the R_LOS or LOF, occurs in the system.
The optical power is improper.
The transmission fiber is faulty.
The transmit unit at the opposite station is faulty.
The board at the local station is faulty.
Procedure
1. Check whether any higher-level alarm, such as the R_LOS or LOF, occurs on the board. If yes, take priority to clear it and then check whether the BEFFEC_EXC alarm is cleared.
2. If the alarm persists, clean the fiber connector and then check whether the BEFFEC_EXC alarm is cleared.
3. If the alarm persists, check the input optical power. Moreover, you can add or remove some optical attenuators so that the optical power is proper.
4. If the alarm persists, check the launched optical power at the opposite end. If the optical power is extremely low, replace the optical module on the board or the line board at the opposite end.
5. If the alarm persists, check whether the fiber is damaged. If yes, replace the fiber and then check whether the BEFFEC_EXC alarm is cleared.
6. If bit errors still occur, replace the line board that reports bit errors at the local station.
Thank you!
