Hello; you can check or alter sdp messages with sdpops module. http://www.kamailio.org/docs/modules/4.3.x/modules/sdpops.html -- View this message in context: http://sip-router.1086192.n5.nabble.com/SIP-Message-Body-tp147315p147319.html Sent from the Users mailing list archive at Nabble.com.