when i make a conference call using "conf" soft key. the initiator hears the busy tone when adding third party.. i am facing the same problem when all extensions are internal numbers...the cucm version is 6.1(4) and ipccx 7.0
If you are unable to perform a conference from your phone than your issue is unrelated to UCCX and is somewhere in your UCM implementation.
Tanner Ezell
www.ctilogic.com
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