I've configured Opensips with nathelper and rtpproxy, relay rtp stream to both user agents.(if 2 ua behind same nat, go P2P).
UA1 ----> Opensips -----> UA2
UA1, UA2 in the same nat level.
The problem that I'm facing is when I try to use UA1 call UA2(I uncomment P2P) by relay, UA2 is ringing, I answer the call, there no voice at all. UA1(Twinkle) is display "Giving a try", I found that Opensips is crashed.