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Due to missing internal fiber cross connections bidirectional Backbone trails are not showing as bidirectional in Transmission Media Layer Route

Publication Date:  2019-07-04 Views:  244 Downloads:  2

Issue Description

Actually, The concern is raised by our customer, XYZ Provider that:

There are some old Bidirectional Backbone trails in XYZ network which are not showing as bidirectional in Transmission Media Layer Route (TMLR) (as shown below)

(Note: I am taking only one trail as example, but there are around 20-25 trails)

Alarm Information


Handling Process

Then, we’ve started checking the entire optical cross connections at each node in between for particular trail & find out that there are several internal cross connections are missing that means not created at the time long back when the trail got live. So we've created the missing ones, and after searching again for that particular trail we get the results as required & accepted  by the customer.

Now our customer is delighted with our service.  

Root Cause

Now,  we’ve to take corrective actions as per the customer requirement.

No alarms are reported, power levels, trace are fine & also the trails are working fine.


Although this is an easy task, but still we need to take care while creating the trails & properly check the internal fiber cross connections, to avoid the unnecessary complaints.