During deployment in an office, the receive optical power of all ONUs under two-level optical splitters is normal but the ONUs fail to go online.

 

 

How to deal with it 

Possible Cause

• Too large length distance between branch fibers.
• The ONU receive optical power is larger than the overload optical power.
• The ONU receive optical power is smaller than the sensitivity.
• There is abnormal attenuation on ODN lines.
• The distance between the ODN Max. receive optical power and Min. optical power exceeds the threshold.

Analyze the network. It is found that the distance between the farthest ONU and the OLT is over 20 km.

So, you can plan the ODN again and connect the ONUs whose fibers are longer than 20 km to another PON port.

Suggestion:

Make sure that the distance between the farthest ONU and the nearest ONU under a PON port is smaller than 20 km.

 

 

good sharing

Good case. Thanks for your sharing!

In addition:

Besides the distance between the farthest ONU and the OLT should be smaller than 20 km, the distance between branch fibers should be smaller than 20km too.

Good sharing, it is very important in the deployment.

Thans, Ive got it.

Welcome

Handy Troubleshooting solution.. thanks for sharing.. 

Im very happy that its useful to you.