HI cao
You would need to take a look to SDPs on INVITE and ACK to check , external
IP address are there in order to work properly. If that is the case, you
would need to check that packets are forwarded internally behind two NATs.
What RTP Proxy are you using? I highly recommend to use rtpengine
Hello:
I use kamailio as my SIP signal proxy, and media-proxy as RTP relayer.
It works well at many situations. But when it comes to two layer of NAT(a
user behind two layer of NAT), I got a single way media(the sip signal
layer was ok). I can’t hear the voice of user who behinds two layer
