Input errors on T1 WIC

Unanswered Question
Jun 4th, 2007

I have a new point to point T1 that's getting input errors, CRC, frame and abort errors on the routers at both ends. About every other day or 2 the line goes down, down. As soon as the telco checks the line it comes back up. Telco replaced the smjk on one end but still have the same problem. There are no output errors on either side. Any ideas on how to determine what is causing this problem? Thanks.

I have this problem too.
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Paolo Bevilacqua Mon, 06/04/2007 - 12:49


how you clock is set? Ask telco if they are providing clock on both sides. Then even without waiting for the answer, try to set one side with internal clock.

Failing that you can run BERT and loopback tests to demonstrate telco that the line is not OK.

Hope this helps, please rate post if it does!

kemurdock Tue, 04/08/2008 - 13:16

Did you ever get this resolved, I also have a point to point acting the same way.

tbokman Tue, 04/08/2008 - 15:20

Yes, it's fixed. Telco finally switched over to a different pair of wires and line hasn't dropped since. Took a while to convince them the routers were NOT the problem.

Paolo Bevilacqua Wed, 04/09/2008 - 02:13

That is the same story all the time. This is telco's standard approach, they blame customer equipment until proven otherwise.

Just yesterday I had to set a loopback in a router to convince them the circuit was faulty. After that, they apologized and fixed it in 4 hours.


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