search for: 2a338cf5518531e31190bd4b7826d137

...set (aka default of 60secs). Of course, logs on Box A were not set to show debug info, so there is no indication of a problem. Logs on Box B show no issues, only at a very specific start time, there are suddenly tons of: [2014-02-13 00:12:50] DEBUG[31516] chan_sip.c: Allocating new SIP dialog for 2a338cf5518531e31190bd4b7826d137 at x.y.z.166:5060 - OPTIONS (No RTP) I've done quite a bit of searching, but am not finding anything of consequence. Also, the Asterisk changelogs are not providing anything that would indicate this is known and fixed, at least for the 11.x branch. Thoughts/suggestions? Thanks! --Tim