You are receiving garbage on the line. Not only are you unable to frame
correctly but
"Current port master clock: local osc on this network module"
which indicates you can't even derive clock from the incoming signal.
You need to work with your telco to ensure that the other end is connected
and that the line is working
Erik Drost wrote:
> Hi,
>
> I have a problem with a VWIC using G.703 in an NM-2FE2W on a Cisco 3620
> (IOS 12.2.1 IP featureset). The E1 serial line is down and a "show
> controller E1" shows a "Receiver is getting AIS" error message (framing,
> impedance and linecode are configured correctly):
>
> Router#sh controllers e1
> E1 1/0 is down.
> Applique type is Channelized E1 - unbalanced
> Receiver is getting AIS.
> alarm-trigger is not set
> Version info Firmware: 20010315, FPGA: 15
> Framing is NO-CRC4, Line Code is HDB3, Clock Source is Line.
> Current port master clock: local osc on this network module
> Data in current interval (171 seconds elapsed):
> 0 Line Code Violations, 0 Path Code Violations
> 0 Slip Secs, 171 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
> 0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 171 Unavail
> Secs
> Total Data (last 24 hours)
> 1 Line Code Violations, 0 Path Code Violations,
> 0 Slip Secs, 86400 Fr Loss Secs, 1 Line Err Secs, 0 Degraded Mins,
> 0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 86400
> Unavail Secs
>
> Documentation on CCO (http://www.cisco.com/warp/public/74/107.html)
> tells me:
> The Alarm Indication Signal (AIS) alarm is set when the last FAS
> and NFAS frames have included less than 3 0's in timeslot 0 (the AIS is
> an all 1's signal). The AIS is normally set by transmission equipment
> detecting a fault.
>
> But I still don't know what I have to do to troubleshoot the line. Can
> anybody help me with this one?
>
> Thanks in advance,
>
> Erik Drost
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