Yes, the Cisco tac is saying the Ok, cancel message gets to the phone
and doesn't reply.
Using the latest 11.7 firmware. CUCM v10.5.2 su3.
I've seen this before and it was caused by network issues where the other
phones didn't receive the Cancel.Theay are getting it.
How many phones have the
I have heard of this but have yet to see it from a trace perspective. For
troubleshooting, my first step would be to determine if the problem is CUCM or
the IP Phones that don't stop ringing. The call is sent to an 8851/61 using
INVITE, which means CUCM should force them to stop ringing on
There's an issue where some phones don't ring-
https://bst.cloudapps.cisco.com/bugsearch/bug/CSCuz56811
For your issue, I'd do some packet captures at CUCM and the phones
ideally. CallManager traces/Console logs may be a good start if you can't
get captures.
I've seen this before and it was
Not saying it's the issue, but I know there was a few really messed up bugs
with 10.5 with the firmware that was bundled in. This might be one of those
bugs. I'd personally try updating your firmware for 88XX and see if it resolves
the issue.
Ben Amick
Telecom Analyst
-Original
