The optical fiber terminal ONU and its corresponding first-layer uplink relationship are the OLT, so how to identify the communication status between the OLT and the ONU from the PON light, the following Pop will introduce in detail.
1. The PON light is off, and the LOS light is on.
Conclusion: The line is disconnected and the fiber is not connected properly.
2. The PON light is off, and the LOS light is off.
Conclusion: there is light and normal (about -7~-27) and the PON light flashes within 30 seconds.
3. The PON light is off, and the LOS light is off.
Conclusion: It shows that the OLT is faulty and the PON network management shows that the OLT is normal.
4. The PON light flashes and the LOS light goes out.
Conclusion: The ONU is being registered.
If the PON light stays on for 5 seconds and then turns off, and then the LOS light turns on and then turns off, repeating alternately indicates that the uplink fiber may be jumped incorrectly and cannot be registered. or OLT data error. (That is to say, the upper end has not opened the business for you, and this light cat has not passed the upper-end equipment certification.)
If the PON light keeps flashing, it means that the optical power is too large and exceeds the limit. It is necessary to make a new cold joint, or wipe the cold joint with alcohol, or use an optical power meter to check and register again within the limited range.
