Could you help me with this problem? When I call H323 gateway there is no sound in both ways. Here is h323 debug: ----- begin ------------------------ -- Executing Dial("SIP/msn-6297", "H323/73952389512@peer:1720") in new stack Allowed Codecs: Table: G.729A{sw} <1> G.729{sw} <2> G.711-uLaw-64k <3> G.711-ALaw-64k <4> UserInput/hookflash <5> UserInput/RFC2833 <6> Set: 0: 0: G.729A{sw} <1> G.729{sw} <2> G.711-uLaw-64k <3> G.711-ALaw-64k <4> 1: UserInput/hookflash <5> 2: UserInput/RFC2833 <6> -- Making call to 73952389512@81.17.12.22:1720 without gatekeeper. == New H.323 Connection created. -- root is calling host 73952389512@81.17.12.22:1720 --Call token is ip$localhost/31515 -- Call reference is 31515 -- DTMF Payload is 101 -- Called 73952389512@peer:1720 -- Sending SETUP message -- Transmitting RFC2833 on payload 101 -- Started logical channel: sending G.729A{sw} -- channelsOpen = 1 External RTP Session Starting RTP channel id 1 parameters: -- remoteIpAddress: 81.17.12.22 -- remotePort: 26454 -- ExternalIpAddress: 0.0.0.0 -- ExternalPort: 14182 -- Started logical channel: receiving G.729A{sw} -- channelsOpen = 2 External RTP Session Starting RTP channel id 1 parameters: -- remoteIpAddress: 81.17.12.22 -- remotePort: 26454 -- ExternalIpAddress: 0.0.0.0 -- ExternalPort: 14182 ExternalRTPChannel Destroyed ExternalRTPChannel Destroyed ExternalRTPChannel Destroyed ExternalRTPChannel Destroyed ExternalRTPChannel Destroyed ExternalRTPChannel Destroyed =-= In OnAlerting for call 31515: sessionId=0 -- Ringing phone for "73952389512" - Progress Indicator: 8 -- H323/peer:1720 is making progress passing it to SIP/msn-6297 -- H323/peer:1720 is ringing -- Transmitting RFC2833 on payload 101 =-= In OnConnectionEstablished for call 31515 -- Connection Established with "Unknown" -- H323/peer:1720 answered SIP/msn-6297 -- Received Facility message... -- Received Facility message... -- Received Facility message... -- Received Facility message... -- ClearCall: Request to clear call with token ip$localhost/31515, cause 3 -- Sending RELEASE COMPLETE channelsOpen = 1 channelsOpen = 0 ExternalRTPChannel Destroyed ExternalRTPChannel Destroyed == Spawn extension (messanger, 73952389512, 1) exited non-zero on 'SIP/msn-6297' -- ClearCall: Request to clear call with token ip$localhost/31515, cause 7 -- Unknown has cleared the call == H.323 Connection deleted. -------- end --------------------------------------------------------------------