I have a "chatch 22".
CUCM 12.0 and UCCX 11.6
Incoming calls don't hear MOH, for the UCCX queue time, unless I enable "Media Termination Point Required".
When I enable the use of MTP, all outgoing calls fail with busy.
The PSTN are trough a Interoute SIP trunk, terminated on a Cisco CUBE-SP ASR1004.
Just floating this to hear if anyone have encountered a ,similar problem.
MOH works fine, when I put an external on hold from a IP-phone(8851).