I have a Viking C-2000B door entry system. I'm using CUCM 7.1(3b)SU2 and a 2821 ISR with 4 FXO ports and a 12(4)3T IOS. The Viking is connected to one of the FXO ports. I am using MGCP for control of 2 T1 PRIs on the ISR, but there are no configurations for the FXOs on the router within MGCP (although there used to be when we were originally messing with this). Everything that has to do with the FXOs is H.323 at the moment. I have created a PLAR connection on the voice-port and a voip dial-peer with a destination pattern of the PLAR number. This dial-peer points the number to CUCM. It is also the ONLY dial-peer on the ISR (H.323 or MGCP). I didn't forget my h323-gateway configurations on the interface that CUCM uses for communication.
When I press the button on the Viking unit, the phone that's supposed to ring gives about a half a ring and the device immediately hangs up. It does this 5 times until the device finally gives up.
Apparently no one on the planet has tried to install this besides me, and I'm at a loss. Any ideas? Can anyone prove that I'm a liar and say that they've installed it successfully?