Just notice the icon is a dark yellow (offline) yet all my lines work as I used one line to call another ... even called my cell and that worked ...
Ideas

I was just about to ask the same thing. I am guessing the link to the OBI server was disconnected, but not to your VOIP provider. Is that correct?
Also, on day to day calls, say through Google Voice, do they go from my OBI to GV, or do the calls route through OBI's servers in any way?