<div dir="ltr">Hi,<div><br></div><div>First of all, check if SIP Traffic is going through your SIP Server, not directly between Endpoints. To do this check if Record-route parameter is set in configuration file:</div><div><pre class="gmail-programlisting" style="font-family:monospace;white-space:pre;background-color:rgb(252,255,252);border:1px solid rgb(153,204,204);color:rgb(0,0,0);padding-left:15pt;overflow:auto;border-radius:2.5px;font-size:15px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial">record_route();
</pre><br class="gmail-Apple-interchange-newline"><a href="https://www.kamailio.org/docs/modules/5.1.x/modules/rr.html">https://www.kamailio.org/docs/modules/5.1.x/modules/rr.html</a><br></div><div><br></div><div>Also, be sure that in SDP body you have External IP of your Kamailio/RTPproxy. If Kamailio is behind NAT you may need to use fix_nated_sdp function from nathelper module:</div><div><br></div><div><a href="https://www.kamailio.org/docs/modules/5.1.x/modules/nathelper.html#nathelper.f.fix_nated_sdp">https://www.kamailio.org/docs/modules/5.1.x/modules/nathelper.html#nathelper.f.fix_nated_sdp</a><br></div><div><br></div><div>Regards,</div></div>