CUCM 7.1.3
Hi,
We have a series of phones that have registered and work as expected like 7912, 7940, and 7960's. However when I register and add a DN to a 3911 it can't place calls and doesn't have the typical dialtone sound. It can recieve calls to it however. It's a SIP phone running firmware SIP3951.8-1-2SR1.
I saw some discussion on enabling 'Media Termination Point Required', but I don't see that in CUCM Admin > Media Resources > Media Termination Point or within the gateways.