What is the reason for the ONU signal light flashing red?

1. The optical port in the computer room emits low light or no light, which causes the optical ONU at the user end to work abnormally. At this time, the optical signal lamp cannot receive the optical signal sent from the optical cable or the receiving signal power is too low, which will cause the optical cat to shake hands with the computer room. Normal, at this time the light signal light will flash or red light to warn.

2. The optical cable failure (including the broken optical splitter) will also cause the ONU to receive no light or the light reception is too low. At this time, the light signal light will also flash or the red light will give an alarm.

3. The failure of the ONU itself and the damage to the receiver part will also cause this phenomenon.

4. Server failure, such as server maintenance, will cause a red light.