[cisco-voip] Forwarded Calls drop after 29 secs

[James Buchanan]

I had the same issue once. The SIP provider's provider was killing the
call at thirty seconds.

 

James Buchanan, CCIE #25863

Senior Network Engineer

Coleman Technologies, Inc.

12 Cadillac Drive, Suite 130

Brentwood, TN 37017

(615) 866-5729

 

From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Jim Skelton
Sent: Friday, January 22, 2010 2:46 PM
To: Joel Perez
Cc: cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] Forwarded Calls drop after 29 secs

 

Hi Joel,  I had a similar issue.  I would see our calls drop after
exactly 30 seconds.  It turned out to be an issue with our carrier
TimeWarner telecom and thier Oakland SIP switch.  We repointed to thier
North Carolina SIP switch and everything cleared up.   TW is running
Sonus switches.

 

 Our setup with twtelecom is Carrier---sip---CUBE----h323---CUCM

 

Hope this helps.

 

 

 

Jim Skelton

Halliburton

 



 

On Fri, Jan 22, 2010 at 1:13 PM, Joel Perez <tman701 at gmail.com> wrote:

Hey Guys,

 

I have a customer that is experiencing a weird issue.

Currently some of their forwarded calls are failing after 29 secs. I
believe it is only happening when the calls are forwarded to 2 specific
carriers, but cant confirm that yet.

I have a ticket open with the carrier so that they can take a look at
the traces we have captured. 

The issue happens the following way. Inbound call to main company DID
goes to an AA, if no choice is used by the caller then it goes to a live
person. However afterhours this live person forwards their call to an
offsite #. When that offsite # receives the forwarded call they are only
able to stay on for 29 secs then the call dies on both ends.

 

THe set up is as follows: 

Carrier---sip---CUBE----sip---CUCM---sccp---IPT

CUCM is 7.0

Unity is 7.0

CUBE is 12.4.(20T4)

 

I have tried capturing debugs on the CUBE but havent been able to see
any SIP (BYE) messages from either side.

This only happens when Unity is involved. Normal CFW doesnt have this
problem.

 

 

Thanks,

 

Joel P


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