Hi Brian, I am pulling from git and do see the difference. I don't know what's going on with ESL and background events which is causing me some testing headaches but I think I know what's happening with the reinvite. The 420 that comes back seems to be moaning about the Require: timer. header that's passed by FS. The original dialogue negotiated session timers, so FS passes a header in the reinvite requiring timers. It seems that the SBC at the other end doesn't like this and in the 420 a field Unsupported: timer is included. Is there a possibility to have a configuration option which removes the Require: timer in reinvites? Cheers, Neil. -- View this message in context: http://freeswitch-users.2379917.n2.nabble.com/uuid-media-hangs-tp5145657p514... Sent from the freeswitch-users mailing list archive at Nabble.com.