Giovanni, I think the reINVITE is sent by session timer.  Per rfc4028 https://datatracker.ietf.org/doc/html/rfc4028#section-10 | | | | rfc4028 Session Timers in the Session Initiation Protocol (SIP) (RFC ) | | | It is RECOMMENDED that this refresh be sent once half the session interval has elapsed. 900 seconds = 1/2 * 1800 /Kaiduan On Tuesday, July 20, 2021, 08:52:31 a.m. EDT, Giovanni Maruzzelli <gmaruzz@gmail.com> wrote: Hello FreeSWITCHers! I've found that in a conference (mod_conference) a re-invite is sent by FS at around 900 sec after call confirmed (ACK). This has nothing to do with session-timeout (eg, session-expires) that are both set to 1800, and sent by FS and clients accordingly. I can see this behavior only in conference (but maybe is elsewhere?). I've looked into both mod_sofia and mod_conference sources, but I've not found anything related. I've tried to debug the call with all kind of debugging/tracing (sofia lib, mod sofia, internals, etc etc) but I've not found any hint of what can trigger that reinvite. Is it configurable? Have a nice continuation, keep on with the superb work, -giovanni -- Sincerely, Giovanni Maruzzelli OpenTelecom.IT cell: +39 347 266 56 18 _________________________________________________________________________ The FreeSWITCH project is sponsored by SignalWire https://signalwire.com Enhance your FreeSWITCH install with disruptive priced SMS and PSTN services. Build your next product on our scalable cloud platform. Join our online community to chat in real time https://signalwire.community Professional FreeSWITCH Services sales@freeswitch.com https://freeswitch.com Official FreeSWITCH Sites https://freeswitch.com/oss https://freeswitch.org/confluence https://cluecon.com FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users https://freeswitch.com