Hoping someone can toss me a clue on this one, I'm approaching wit's end. Running v15 Free for now (getting trunks soon so I will be buying) Two POTS lines, Patton 4112, Yealink T23G The extension in question is the operator. Allow multiple and BUSYOPT are both set. Outside calls come in fine, but when the SECOND outside call comes in, she gets call waiting beep fine but no line light to pick the call up ... until a magical timeout that I can't find elapses - if I let second call ring for 30 seconds, I hear a stutter tone on the extension, then get call waiting tone and line indication (in other words, what I wanted 30 seconds ago!) If she's on a call and an INTERNAL call hits as the second call, the line lights up immediately and all works as it should. The Patton is set up with the second port as a DID and 3cx recognizes it and routes the call fine. Thoughts??