[Serusers] rtpproxy but no nat translation needed

Hello, thanks all the list for help me (and others) with nathelper and rtpproxy. I want to test rtpproxy on my network, but without nat translation. It means, udp streams have to go through my server. I'm not sure what functions from nathelper module I have to use. My idea is something like this: if (method=="INVITE"){ force_rtp_proxy(); t_on_reply("1"); } .... onreply_route[1]{ force_rtp_proxy(); } I don't know whether this code is enough, or I have to use another functions like fix_nated_contact() or fix_nated_sdp() to rewrite Contact an SDP headers. Thanks for your help.