Pjazz, did you ever get this to work? I tried this today, I can make calls to the IP office and pass Caller-id from the BCM, But calling back to the Bcm from the IP office, thru ARS I get a steady tone as you do, If I bypass ARS, I receive a busy tone. When I monitor trunk status on the system status, it shows dialing then will disconnect the call. I do not see the call in the bcm monitor, but outgoing displays just fine. Just was curious if you got it to work. P.S. target received digits are correct and digits to expect in Public dialing plan of the BCM.