[cisco-voip] Outbound Dial with Carrier SIP Trunk

[Pender, James]

The issue actually turned out to be a CCM Bug. We worked with Mike on Friday and have him up and working via a hardware MTP on his router until we can implement a code that has the fix for the bug below. Ideally we want to have a setup at the end of the day without MTP.

CSCsu72615 Bug Details
CUCM fails to prack second 18X
Symptom:
CUCM 6.1.2
When working with SIP provider we can get a 180 ringing contains an SDP.

If you get a SDP in a 180 ringing, and it arrives before CUCM sends a 200 OK for a previous PRACK you can run into issues where your call gets disconnected.

CUCM needs to respond to the PRACK, but we don't.

Conditions:
6.1.2
SIIP trunk to provider with out MTP.


1st Found-In
6.1

Fixed-In
7.1(0.39000.81)
6.1(2.9901.189)
6.1(2.1119.1)
7.0(1.12003.1)
7.0(1.12003.2)

Thanks,
Jim Pender
Senior Data Network Engineer
PAETEC Communications



________________________________

From: cisco-voip-bounces at puck.nether.net [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of FrogOnDSCP46EF
Sent: Saturday, October 04, 2008 2:47 AM
To: cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] Outbound Dial with Carrier SIP Trunk


Mike,
You have a codec negotiation issue:
May be your SIP provider is runing GSM or some weired codec.

 ret2=0, codecMask2=4, bytes2=20, negot2=1, dtmf2=6
Oct  3 09:05:08: //64/xxxxxxxxxxxx/CCAPI/
ccConferenceCreate:
  delay media to slow start case, codec negotation is not done
Oct  3 09:05:08: //64/xxxxxxxxxxxx/CCAPI/cc_api_get_xcode_stream:




--
Smile, you'll save someone else's day!
Frog