Hello, Do you have a PBX between Kamailio and sipml5? From: sr-users [mailto:sr-users-bounces@lists.kamailio.org] On Behalf Of vinod mn Sent: Monday, June 11, 2018 6:19 AM To: sr-users(a)lists.kamailio.org Subject: [SR-Users] SIP/2.0 603 Failed to get local SDP for sip to webrtc (SIPML5)call Hi i configured sipml5 and kamailio , sipml5 clients registers to kamailio when i make a call to kamailio call lands on the sipml5 client but i am getting this error "SIP/2.0 603 Failed to get local SDP" on chrome/firefox/opera webbrowsers. kamilio configuration as per http://www.kamailio.org/docs/modules/4.4.x/modules/websocket.html#idp534117… -- Thanks and regards Vinod.M.N