I have two 3904 phone sets (actually there are more but I just want to talk about these two). One "Help Desk" line - 7611. When 7611 rings on D's phone he can pick up and transfer with no problem. When J tries the call ends up on his primary line and he cannot transfer the call. I have compared the programming and they match. Neither phone has add ons. What could possibly cause this? When programming did I need to specify something for KBA and DBA (I cannot find them listed on the TNs)?