Kamailio: how to route RTP media directly to endpoint

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Kamailio: how to route RTP media directly to endpoint

Aleksey Hodin

Hi all,

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:


UserA ---sip--> Kamailio --> Asterisk --> UserB

           \-rtp--> Kamailio (rtpproxy) --> Asterisk --> UserB


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.

So we decided to try route all rtp traffic between users directly.


UserA ---sip--> Kamailio --> Asterisk --> UserB

           \-rtp--> --> --> UserB


Is it possible at all? Maybe someone already did it …




BR, Alex


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