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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