Hello Nahum, If I understand your question correct then all you have to do is let kamailio listen on tcp where you are recieving the requests: listen=tcp:KamailioIP:KamailioPort Best Regards Dimitry Nagorny Trainee Von: sr-users [mailto:sr-users-bounces@lists.sip-router.org] Im Auftrag von Nahum Nir Gesendet: Dienstag, 31. Mai 2016 00:25 An: serusers <serusers(a)iptel.org> Betreff: [SR-Users] Accept INVITE with transport=tcp Hi, I have a client that sends INVITE with transport=tcp. How can I make Kamailio to work with that? Thanks and regards, Nahum