Re: [SR-Users] Question about sip call setup : three-way handshake

Maybe PRACK, RFC 3262, is what you are looking for? --- Stefan On Jun 21, 2017 2:46 PM, "Abdoul Osséni" <abdoul.osseni(a)gmail.com> wrote: Hello, During three-way handshake (SIP call setup - INVITE-200 OK - ACK) and before generating or sending the final 200 OK call, is there a way to confirm the caller is still available (no network issue)? I want to detect broken connections (ex. the uac uses 3G network) before generating/sending/forwarding the final 200 OK. Thanks. Regards Abdoul _______________________________________________ Kamailio (SER) - Users Mailing List sr-users(a)lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users