[cisco-voip] CUCM 7 to UCM4 Call Failure

[Ryan Ratliff]

Take a look at http://www.cisco.com/en/US/products/sw/voicesw/ps556/ 
products_tech_note09186a0080094e89.shtml#calm

-Ryan

On Aug 4, 2009, at 7:40 AM, dev wrote:

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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