<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 14 (filtered medium)"><style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Garamond;
panose-1:2 2 4 4 3 3 1 1 8 3;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-serif";
mso-fareast-language:EN-US;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
span.EmailStyle17
{mso-style-type:personal-compose;
font-family:"Garamond","serif";
color:windowtext;
font-weight:normal;
font-style:normal;}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri","sans-serif";
mso-fareast-language:EN-US;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:2.0cm 42.5pt 2.0cm 3.0cm;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></head><body lang=RU link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span lang=EN-US style='font-family:"Garamond","serif"'>Hi all, <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Garamond","serif"'>We have usual config Kamailio + Asterisk where Kamailio play as sip and rtp proxy. Kamailio have public IP, asterisk – no. All calls between clients now going like that:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Garamond","serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Garamond","serif"'>UserA ---sip--> Kamailio --> Asterisk --> UserB<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Garamond","serif"'> \-rtp--> Kamailio (rtpproxy) --> Asterisk --> UserB<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Garamond","serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Garamond","serif"'>All clients of course from Internet and behind Nat. Main problem is amount of traffic going through Kamailio and Asterisk. We need to pay for every additional GB behind limit in tariff plan to hosting provider.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Garamond","serif"'>So we decided to try route all rtp traffic between users directly. <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Garamond","serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Garamond","serif"'>UserA ---sip--> Kamailio --> Asterisk --> UserB<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Garamond","serif"'> \-rtp--> --> --> UserB<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Garamond","serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Garamond","serif"'>Is it possible at all? Maybe someone already did it …<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Garamond","serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:9.0pt;mso-fareast-language:RU'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:9.0pt;mso-fareast-language:RU'>--<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:9.0pt;mso-fareast-language:RU'>BR, Alex<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Garamond","serif"'><o:p> </o:p></span></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>