Pay attention to the 10G services interruption on Huawei OSN 8800 layer

Problem details: 10G services on OSN 8800 layer interrupted. And three 10 G Services impacted for than 20 seconds. The input optical power fluctuated for about 2.2dB in line boards which was probably triggered by abnormal fiber condition. Then lots of code errors appeared in receiving side of the 8030 site, and finally resulting in service interruption.
Both the working and protection line boards received many line code errors:
1. Check the related fiber connectors. If the fiber connectors are dirty, clean or replace them.
2. If the alarm persists, check the fiber jumper. If the fiber jumper endures a large bending radius or it is damaged or aging, adjust or replace the fiber jumper
3. The Huawei optical interface connector is well inserted.
4. The fiber connector is clean.
5. The cable is intact.
6. Add or remove some optical attenuators so that the optical power is proper.
7. Check whether the fiber is damaged. If yes, replace the fiber,
8. If bit errors still occur, replace the line board that reports bit errors at the local station.
1. Please take in process the link optimization activity.
2. OSNR should be monitor on routine basis.