I have integrated Tandberg VCS with CUCM 8.0.3 over a SIP trunk. I am facing below two problems:-
1. When Tandberg phone makes video call to CIsco 9971 phone. The call gets disconnected after about 2 -3 minutes, On CIsco phone call gets disconected & at Tandbeg phone call timer continues but without any video or voice.
2. When Cisco phone makes a call to Tandberg phone a fast busy tone is received.