Hi Yes, this is how it works. Kamailio does SIP signalling, not RTP. You could use rtpengine as an RTP proxy on the same or another machine and use the kamailio rtpengine module manipulate SDP so traffic flows via rtpengine and to tell rtpengine how to route rtp traffic. https://github.com/sipwise/rtpengine https://www.kamailio.org/docs/modules/stable/modules/rtpengine.html -- Mit freundlichen Grüssen -Benoît Panizzon- @ HomeOffice und normal erreichbar -- I m p r o W a r e A G - Leiter Commerce Kunden ______________________________________________________ Zurlindenstrasse 29 Tel +41 61 826 93 00 CH-4133 Pratteln Fax +41 61 826 93 01 Schweiz Web http://www.imp.ch ______________________________________________________