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Fiber auto search cause the service down

Publication Date:  2012-07-25 Views:  82 Downloads:  0

Issue Description

Customer transmission network consists of OSN 7500. One day,  one STM-1 service down. Customer cancelled  the "J0 mismatch detection" of the opposite equipment which from other vendor, then service was restored.

Alarm Information

MS_RDI, HP_RDI

Handling Process

Cancelled the "J0 mismatch detection" of the opposite equipent, service restored.

Root Cause

Check the operation log, we found there is "Fiber auto search" ((File-->Search for Filber/Cable) when service down.  "Fiber auto search" function is based on J0, it will change J0. But the opposite equipment will insert AIS when J0 
mismatch.

Suggestions

When such problem happens, to restore service, you can configure the J0 configuration again, or cancel the "J0 mismatch detection" of the opposite equipent.

END