I had a related question. I do NOT have my Obi set to ring both lines, yet I would still like the ability to answer a call ringing on Phone 2 from Phone 1 or vice versa on occasion. I tried the solution of hitting ##1 from Phone 2, and it did not answer the call. I understand why that might not be desirable behavior in all cases, but I would be interested in having that ability for my situation. Any ideas on how to make it work?