Gateway configured on Freeswitch and proxy as Kamailio

[Ganbold]

I spent 2 days on this problem. Please leave any comment. Thanks in advance.
Freeswitch's ip address is internal (behind NAT).
I'm using a kamailio as proxy server (got Public IP).
I registered gateway on freeswitch. When receive a call, SIP register, invite messages are 200 OK. But no RTP messages.
Can you advise how fix it? Want RTP stream schema like "Mobile operator -> Kamailio -> Freeswitch (+97699009909 gateway)"

 

[Adrian Fretwell]

I believe that kamailio, like OpenSIPS is just a SIP proxy. If you need the media stream proxying you need to engage an RTP proxy like rtpproxy or mediaproxy.
Example:
https://opensips.org/html/docs/modules/2.2.x/rtpproxy.html