T-1 with AMI Line Coding

Posted on 2008-11-12
Last Modified: 2013-12-14
I've got a point-to-point T-1 from my headquarters to another location about 10 miles away.  The line coding is set to ami (not sure why, it's only been out there for about a year)...  But on the HQ side of the circuit, I show the red alarm on the smartjack, on the remote side, no alarm and the circuit stays up, but I'm sure I am showing alarm for some reason...  I would think this would cause some performance issues or at least some jitter.  The guys at the telco are clueless, and tell me it's my equipment.  I've changed out equipement on both sides and still have the same issue...

I've hardcoded on both routers to set the linecode to AMI with:
service-module t1 data-coding inverted
service-module t1 linecode ami

Does anyone have any ideas on what could be the issue here??
Question by:rhcellxion
    LVL 11

    Expert Comment

    can you paste in a "show int" and "show controller" for the t1 interfaces at both ends? And is there a reason you can't have the LEC switch to eat/b8zs encoding? It's more reliable and efficient.

    Author Comment

    Here are the show controller and show int for the HQ and Remote side...  To be honest, I havent even checked on having them change the line coding to b8zs....
    LVL 11

    Accepted Solution

    OK, the circuits show as up and in good condition, with only a .17% error rate. That's not too bad, especially if you move a lot of data over the circuit.  So what is the alarm light that you're seeing? No alarms are being shown in the Show Int or Show Controller output. Is it on the CSU or the WIC card? Is it possible you're misreading a nearby LED that is bleeding through to the alarm LED from the side? Often you have to be directly perpendicular to the lights to get a good reading.


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