I've decided to do this properly: clean fresweetch reinstall. My worsktation hosts freeswitch + 1 sip phone also running as 1000 (linux - IP 10.99.8.221) Other windows machine has gtalk with and also a sip phone registered as 1001 (IP 10.99.8.111). First case - SIP to SIP. Calling from 1000 to 1001 and vice versa works, audio is perfect. Packets are propery travelling between 10.99.8.221 and 10.99.8.111 Second case : On windows machine I open gtalk and I open a chat to buddy which is actually a bot logged in on freeswitch (dingaling client mode). The I started java socket program which listens to icoming messages, after typing into client "call 1000@10.99.8.221" an api command is executed: "api originate sofia/default/1000@10.99.8.221 &bridge(dingaling/gmail.com/gtalk_mail(at)gmail.com)" A call is placed between gtalk and sip phone 1000, it rings, but when both end answers there is no audio. After a minute, the call ends itself. I've attached wireshark dumps from both ends - what is strange is that packets are not trying to got at right IP, instead they hit some other machine (213.x.x.x), which doesn't make sense. Fresh log from freeswitch (I don't know why 213.x.x.x gets mixed in this story): http://pastebin.com/m75b10388 // I hope the attachments go trough - 17 KB. test_gtalk_client_side - dump from win machine (gtalk client) test_sip_client - dump from linux machine (freeswitch and sip phone client) I hope to get resolved this mistery somehow. Thank you for all kind answers.