Installing a BCM 400 for the first time. I have set up the DID's under the LINE programming. Ex: DID number 1005 is on line 305 etc.... I have set up extension 1005 to ring on line 305. Recieved digits are 4. When I call the telephone number. xxx-xxx-1005 I get a fast busy... So, just to do a test. I put a MICS 0x32 on the T-1 and it works fine.... what programming am I missing?