I have installed kamailio-4.0.2 and rtpproxy-1.2.1 in same machine on a private ip (10.150.226.160).

First I used PC to PC call by using MicroSip as sip client at both end in LAN. Everything running fine.I can make calls and receive calls on both PC.

Then I used SAMSUNG Galaxy star duo and installd CSipSimple as sip client on wifi.

When I try call from SAMSUNG Galaxy star (IP - 10.150.212.245:5060) to PC (IP - 10.150.216.84:5060) Its running fine. I can receive call .

BUT When I call from PC to SAMSUNG Galaxy star call is not connecting .

kamailio sending INVITE message to SAMSUNG Galaxy star repeatedly. No 200 OK comes from  SAMSUNG Galaxy star.

Can Anybody suggest what could be the problem ?

Thanks in advance.

Thanks,

Manas