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<p class="MsoNormal"><span style="font-family:"Arial",sans-serif;color:black">All, hi:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif;color:black">I’m a Kamailio newbie!<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif;color:black">I’ve managed to set up a proxy server with the minimal configuration file found here:
<a href="https://github.com/kamailio/kamailio/blob/master/misc/examples/mixed/kamailio-minimal-proxy.cfg">
https://github.com/kamailio/kamailio/blob/master/misc/examples/mixed/kamailio-minimal-proxy.cfg</a>.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif;color:black">The issue that I’m having is that the audio on calls simply stop precisely after 15 minutes. It’s always precisely at 15 minutes. The calls continue connected but without any audio.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif;color:black">A summary about my set up:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l2 level1 lfo1"><![if !supportLists]><span style="font-family:"Arial",sans-serif;color:black"><span style="mso-list:Ignore">1.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-family:"Arial",sans-serif;color:black">This is an Amazon AWS EC2 server so it doesn’t have a public IP directly attached to the interface. This makes me believe that the issue might be related to NAT.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l2 level1 lfo1"><![if !supportLists]><span style="font-family:"Arial",sans-serif;color:black"><span style="mso-list:Ignore">2.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-family:"Arial",sans-serif;color:black">I use Flowroute as the SIP trunk for these tests.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l2 level1 lfo1"><![if !supportLists]><span style="font-family:"Arial",sans-serif;color:black"><span style="mso-list:Ignore">3.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-family:"Arial",sans-serif;color:black">My phone system, for testing purposes, works on UDP port 6060 an the RTP ports are 20,000 to 30,000.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l2 level1 lfo1"><![if !supportLists]><span style="font-family:"Arial",sans-serif;color:black"><span style="mso-list:Ignore">4.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-family:"Arial",sans-serif;color:black">I am not using, for the time being, TLS nor SRTP.
<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l2 level1 lfo1"><![if !supportLists]><span style="font-family:"Arial",sans-serif;color:black"><span style="mso-list:Ignore">5.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-family:"Arial",sans-serif;color:black">My phone system is inside the same subnet as the Kamailio server.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif;color:black">Questions:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l3 level1 lfo5"><![if !supportLists]><span style="font-family:"Arial",sans-serif;color:black"><span style="mso-list:Ignore">1)<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-family:"Arial",sans-serif;color:black">Am I missing the NATHELPER module and if so how could we combine it to the minimal proxy configuration described above? Assuming that my Kamailio server uses local IP 10.80.10.5
and the PBX 10.80.10.6, both on UDP port 6060 for SIP.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l3 level1 lfo5"><![if !supportLists]><span style="font-family:"Arial",sans-serif;color:black"><span style="mso-list:Ignore">2)<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-family:"Arial",sans-serif;color:black">May I simply combine the example file for nathelper.cfg as per this URL:
<a href="https://github.com/kamailio/kamailio/blob/master/misc/examples/mixed/nathelper.cfg">
https://github.com/kamailio/kamailio/blob/master/misc/examples/mixed/nathelper.cfg</a> to the proxy example files, change IP addresses, ports, etc.? If not, how would one go about adding the NATHELPER module to the minimal proxy configuration?<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l3 level1 lfo5"><![if !supportLists]><span style="font-family:"Arial",sans-serif;color:black"><span style="mso-list:Ignore">3)<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-family:"Arial",sans-serif;color:black">Could it be some other issue that is causing the 15-minute interruption on audio?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif;color:black">Thank you so much for your help!<o:p></o:p></span></p>
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