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FAQ-transparent supervision through third party NE

Publication Date:  2012-07-25 Views:  135 Downloads:  0

Issue Description

Huawei OSN NEs are interconnected together through third party MW links. these MW links capacity are of STM4 composed of 4 chanels, 1 VC4 each.
the STM4 link is not available before migration, only one VC4 channel is available.
the idea is to supervise HW NEs through these third party NEs.

Alarm Information

after connecting all the equipements together, by connecting to site A, we cannot upload or login to site B; site A line interface receives MS-AIS alarms.

Handling Process

while the DCC bytes are transported via the first VC4, then third party equipment changed their working VC4 to first one, supervision is OK.

Root Cause

after checking third party links by SDH testers, the traffic is ok and stable, logical loop from third party equipment to HW equipment is ok for both sides. after checking the MW link structure we found that the working VC is the 2nd one not the first.