I'd like to monitor if my user's sip phones are disconnected, to let me know there might be a problem in advance. I see there's a CUSTOM event called sofia::unregister. I presume that triggers whenever a phone doesn't re-register in enough time. However, with default registation of 60 minutes (or even 10) I'd like more granularity. I have the endpoints pinging FS, but I don't see an event or that information stored anywhere. How about setting nat-options-ping (or better, all-reg-options-ping since most NATed endpoint don't actually self-identify). Do I get an event if that fails? I see unregister-on-options-fail but that seemed too aggressive when I tried that in the past. What exactly does the less sever mark-dead-on-options-fail do? Does it remove it from the user/$NUMBER endpoint? Does it trigger an event for me? Other suggestions? -Avi