911 calls drop automatically

Unanswered Question
Sep 8th, 2008
User Badges:

I have a customer that uses the 911 service fairly often and when they are on the line for more than a 4-6 minutes, the calls terminate unexpectedly. The customer is using CM 3.3 with an MGCP controlled CAS T1 in the gateway. Any troubleshooting tips would be appreciated.

  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
gogasca Mon, 09/08/2008 - 13:20
User Badges:
  • Green, 3000 points or more

Only 911 calls via this circuit?

Can we get from GW

debug mgcp packet

debug vpm signal

From CUCM side:

SDI and SDL traces

Calling, called and timestamps.


gregorysco Tue, 09/09/2008 - 13:02
User Badges:

I will post the debugs and the CCM trace. Phone number in question is 36098, call was made to 911, start time is 9:58 at approx. 40 - 50 seconds. MAC Address of phone is SEP001121B52CDD. The timing between call amanger and the gateway are off by 1 minute 37 seconds. First I saw and we will definitely fix. But for log purposes, it's a nightmare on this. Was unable to pull SDL trace. Went too late to retrieve. Sorry, about the size of the log. Thanks for your help.



This Discussion