[cisco-voip] CUCM 7 to UCM4 Call Failure

dev sgsdev at gmail.com
Tue Aug 4 07:40:04 EDT 2009


Thanks Ryan for your input. I am unable to look at the traces because I
don't know how to collect/read  them using the RTRM software. Can you help?

Thanks

-----Original Message-----
From: Ryan Ratliff [mailto:rratliff at cisco.com] 
Sent: Monday, August 03, 2009 4:47 PM
To: wazab
Cc: cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] CUCM 7 to UCM4 Call Failure

Sounds like the media exchange timer is expiring, thus dropping the  
call.  This timer has a default value of 12 seconds.   You'll need to  
enable h.245 debugs on the CUCMs on both side of the call and look at traces
to see what is going on.

http://www.td.rutgers.edu/documentation/FAQ/H.323_Tutorial/#signaling
seems to be a decent overview of what to look for on both the H.225 and
H.245 sides.

-Ryan

On Aug 1, 2009, at 10:59 AM, wazab wrote:

Hi,

I have been having a strange problem since I configured CUCM7. I have
CUCM7.0 running on VMware for lab testing. I also have a production CUCM
4.3.2 running serving customers. Both servers are now making calls via H.225
trunks (gatekeeper controlled). There is no intercluster trunks or any
trunks between the two servers.

UCM7 is able to make and received calls without a problem even from UCM4.3.
The issue is that UCM7 is unable to call IP phones registered with UCM4. My
test is calling a DID number that should ring a UCM4 IP phone. What happens
is as follows:

UCM7 Phone (A) calls UCM4 Phone (B)
Phone B rings and phone A hears a ringback tone Phone B picks up Both phones
hears silence for 11 seconds Reorder tone is heard in both phones

I have made sure that the region settings codec are set to g711 on UCM7.
What can be the cause of the problem? Also how can I debug using RTRM?

Thanks

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