Hello Mr.Andrey Kouprianov I made some changes in my mediaproxy and it starts with no errors in that even i saw in log messages it is perfetly say mediaproxy server is on and socked is /var/run/mediaproxy.sock and i registerd three users and even now when iam calling there is no sound in both ways at first i get succsess for only one call and i saw in sessions.py every thing is o.k but after one hour again i tried but i dont know what is happening here here are some messages i found in ngrep port 5060 213.149.178.204:5060 -> 81.21.33.35:5060 SIP/2.0 200 Ok..Via: SIP/2.0/UDP 81.21.33.35;branch=z9hG4bK471b.a07c0605.0..Via: SIP/2.0/UDP 81.21.34.34:5060;rport=5060 ;branch=z9hG4bKC2A7F34D7D1D49139D47222CE36B2163..From: 32331000 <sip:32331000@81.21.33.35>;tag=630051386..To: <sip:32331 002@81.21.33.35>;tag=1982025997..Contact: <sip:32331002@213.149.178.204:5060>..Call-ID: 9602F577-35D2-4596-BB54-5A28F865 6802@192.168.0.77..CSeq: 24309 BYE..Server: X-Lite release 1105x..Content-Length: 0.... # U 81.21.33.35:5060 -> 81.21.34.34:5060 SIP/2.0 200 Ok..Via: SIP/2.0/UDP 81.21.34.34:5060;rport=5060;branch=z9hG4bKC2A7F34D7D1D49139D47222CE36B2163..From: 32331 000 <sip:32331000@81.21.33.35>;tag=630051386..To: <sip:32331002@81.21.33.35>;tag=1982025997..Contact: <sip:32331002@213. 149.178.204:5060>..Call-ID: 9602F577-35D2-4596-BB54-5A28F8656802@192.168.0.77..CSeq: 24309 BYE..Server: X-Lite release 1 105x..Content-Length: 0.... # U 81.21.34.34:5060 -> 81.21.33.35:5060 the phone is connecting fine and when connects i dont hear any sounds Sir, i need your help and iam very desperate to make this sucessfull global calls i hope you will solve my problem thanks kindly regards Ravi.