Greetings All- I have an * box with the NuFone H.323 channel driver installed. I also have an Altigen VoIP system with a PRI to the PSTN. I can sucessfully make a call from a SIP extension (snom190) to an H.323 extension (altigen phone) The thing I can't seem to make work is a call from a H.323 phone to a SIP extension. Here's the layout: <snom190{1235}>==[192.168.0.0/24]==<asterisk>==[IPSEC VPN 192.168.0.0/24 - 10.0.0.0/24] ==<altigen server>==[10.0.0.0/24]==<altigen phone{8810}> It seems that the altigen is sending a ReleaseComplete and dropping the call before it gets routed to the snom190. Here's an h.323 trace 9: 0:26.489 H225 Answer:9a33350 transports.cxx(1136) H225 Incoming call, first PDU: callReference=1471 0:26.492 H225 Answer:9a33350 h323caps.cxx(1942) H323 Added capability: G.711-uLaw-64k <1> 0:26.496 H225 Answer:9a33350 h323caps.cxx(1942) H323 Added capability: UserInput/hookflash <2> 0:26.499 H225 Answer:9a33350 h323caps.cxx(1942) H323 Added capability: UserInput/dtmf <3> 0:26.502 H225 Answer:9a33350 h323caps.cxx(2004) H323 FindCapability: 1 0:26.505 H225 Answer:9a33350 h323caps.cxx(2008) H323 Found capability: G.711-uLaw-64k <1> 0:26.508 H225 Answer:9a33350 h323caps.cxx(2004) H323 FindCapability: 2 0:26.511 H225 Answer:9a33350 h323caps.cxx(2008) H323 Found capability: UserInput/hookflash <2> 0:26.514 H225 Answer:9a33350 h323caps.cxx(2004) H323 FindCapability: 3 0:26.517 H225 Answer:9a33350 h323caps.cxx(2008) H323 Found capability: UserInput/dtmf <3> 0:26.520 H225 Answer:9a33350 rfc2833.cxx(81) RFC2833 Handler created == New H.323 Connection created. 0:26.523 H225 Answer:9a33350 h323ep.cxx(2227) H323 Created new connection: ip$10.0.0.5:1447/1471 0:26.526 H225 Answer:9a33350 h323.cxx(1761) H225 Handling PDU: Setup callRef=1471 0:26.530 H225 Answer:9a33350 h323neg.cxx(334) H245 Stopping MasterSlaveDetermination: state=Idle 0:26.533 H225 Answer:9a33350 h323neg.cxx(561) H245 Stopping TerminalCapabilitySet: state=Idle --Received SETUP message -- Setting up Call -- Call token: [ip$10.0.0.5:1447/1471] -- Calling party name: [AltiServ VoIP Line(00: 0)] -- Calling party number: [8810] -- Called party name: [1235] -- Called party number: [1235] -- Call Failed -- ClearCall: Request to clear call with token ip$10.0.0.5:1447/1471, cause 7 0:26.537 H225 Answer:9a33350 h323ep.cxx(1898) H323 Clearing connection ip$10.0.0.5:1447/1471 reason=EndedByTransportFail 0:26.541 H225 Answer:9a33350 h323.cxx(1540) H323 Call end reason for ip$10.0.0.5:1447/1471 set to EndedByTransportFail 0:26.546 H225 Answer:9a33350 h323.cxx(1558) H225 Sending release complete PDU: callRef=1471 -- Sending RELEASE COMPLETE 0:26.550 H225 Answer:9a33350 h323pdu.cxx(517) H225 Sending PDU: { q931pdu = { protocolDiscriminator = 8 callReference = 1471 from = destination messageType = ReleaseComplete IE: User-User = { 25 c0 06 00 08 91 4a 00 04 58 08 11 00 ba 8b ea %.....J..X...... 28 6d 5e d9 11 8d 2c 00 0b 6a 59 ee 0c 02 80 01 (m^...,..jY..... 00 . } } h225pdu = { h323_uu_pdu = { h323_message_body = releaseComplete { protocolIdentifier = 0.0.8.2250.0.4 reason = undefinedReason <<null>> callIdentifier = { guid = 16 octets { ba 8b ea 28 6d 5e d9 11 8d 2c 00 0b 6a 59 ee 0c ...(m^...,..jY.. } } } h245Tunneling = FALSE } } } Raw PDU: 08 02 85 bf 5a 7e 00 22 05 25 c0 06 00 08 91 4a ....Z~.".%.....J 00 04 58 08 11 00 ba 8b ea 28 6d 5e d9 11 8d 2c ..X......(m^..., 00 0b 6a 59 ee 0c 02 80 01 00 ..jY...... 0:26.586 H323 Cleaner h323ep.cxx(1955) H323 Cleaning up connections 0:26.586 H323 Cleaner h323.cxx(1595) H323 Connection ip$10.0.0.5:1447/1471 closing: connectionState=NoConnectionActive 0:26.586 H323 Cleaner h323neg.cxx(334) H245 Stopping MasterSlaveDetermination: state=Idle 0:26.587 H323 Cleaner h323neg.cxx(561) H245 Stopping TerminalCapabilitySet: state=Idle 0:26.587 H323 Cleaner transports.cxx(1109) H323 H323Transport::Close 0:26.587 H225 Answer:9a33350 transports.cxx(1166) H225 Signal channel stopped on first PDU. 0:26.649 H323 Cleaner transports.cxx(1191) H323 H323Transport::CleanUpOnTermination for H225 Answer:9a33350 0:26.649 H323 Cleaner h323.cxx(1659) H323 Connection ip$10.0.0.5:1447/1471 terminated. -- Call with ended abnormally == H.323 Connection deleted. 0:26.650 H323 Cleaner h323.cxx(1490) H323 Connection ip$10.0.0.5:1447/1471 deleted.