I am trying to use pjsip (Sipek2, http://code.google.com/p/sipek2) with Televantage (http://www.vertical.com/products-televantage.html) as SIP Server.... I can register with the server; but failing to make/receive calls...I am attaching relevant pjsip.log if anyone of you can take a look and suggest the solution.... 01:14:52.189 pjsua_call.c Making call with acc #1 to sip:8001 at 192.168.10.50 01:14:52.189 dlg081A00AC UAC dialog created 01:14:52.189 dlg081A00AC Module mod-invite added as dialog usage, data=06D92584 01:14:52.189 dlg081A00AC Session count inc to 2 by mod-invite 01:14:52.189 dlg081A00AC Module mod-100rel added as dialog usage, data=081A1450 01:14:52.189 dlg081A00AC 100rel module attached 01:14:52.189 inv081A00AC UAC invite session created for dialog dlg081A00AC 01:14:52.189 endpoint Request msg INVITE/cseq=11798 (tdta08190060) created. 01:14:52.189 inv081A00AC Sending Request msg INVITE/cseq=11798 (tdta08190060) 01:14:52.189 dlg081A00AC Sending Request msg INVITE/cseq=11798 (tdta08190060) 01:14:52.189 tsx081A14CC Transaction created for Request msg INVITE/cseq=11797 (tdta08190060) 01:14:52.189 tsx081A14CC Sending Request msg INVITE/cseq=11797 (tdta08190060) in state Null 01:14:52.189 sip_resolve.c Target '192.168.10.50:0' type=Unspecified resolved to '192.168.10.50:5060' type=UDP 01:14:52.189 pjsua_core.c TX 988 bytes Request msg INVITE/cseq=11797 (tdta08190060) to UDP 192.168.10.50:5060: INVITE sip:8001 at 192.168.10.50 SIP/2.0 Via: SIP/2.0/UDP 192.168.10.16:5060;rport;branch=z9hG4bKPj526bbe6c3368479fbe8b9a1b8c361468 Max-Forwards: 70 From: "854" <sip:854@192.168.10.50>;tag=a1e2967c52824eba983bcd628601eda7 To: sip:8001 at 192.168.10.50 Contact: "854" <sip:854 at 192.168.10.16:5060;transport=UDP> Call-ID: f231bc9ef2bd4a06afa46e22d404638a CSeq: 11797 INVITE Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, SUBSCRIBE, NOTIFY, PUBLISH, REFER, MESSAGE, OPTIONS Supported: replaces, 100rel, norefersub User-Agent: SIPek on PJSUA v0.8.0/win32 Content-Type: application/sdp Content-Length: 381 v=0 o=- 3419111692 3419111692 IN IP4 192.168.10.16 s=pjmedia c=IN IP4 192.168.10.16 t=0 0 a=X-nat:0 m=audio 4000 RTP/AVP 3 0 117 102 103 101 a=rtcp:4001 IN IP4 192.168.10.16 a=rtpmap:3 GSM/8000 a=rtpmap:0 PCMU/8000 a=rtpmap:117 iLBC/8000 a=fmtp:117 mode=20 a=rtpmap:102 speex/8000 a=rtpmap:103 speex/16000 a=sendrecv a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-15 --end msg-- 01:14:52.189 tsx081A14CC State changed from Null to Calling, event=TX_MSG 01:14:52.189 dlg081A00AC Transaction tsx081A14CC state changed to Calling 01:14:52.193 sip_endpoint.c Processing incoming message: Response msg 100/INVITE/cseq=11797 (rdata06D85874) 01:14:52.193 pjsua_core.c RX 484 bytes Response msg 100/INVITE/cseq=11797 (rdata06D85874) from UDP 192.168.10.50:5060: SIP/2.0 100 Trying Call-ID: f231bc9ef2bd4a06afa46e22d404638a CSeq: 11797 INVITE From: "854" <sip:854@192.168.10.50>;tag=a1e2967c52824eba983bcd628601eda7 To: <sip:8001 at 192.168.10.50>;tag=192.168.10.50+1+2ea0004+e6f36bef Via: SIP/2.0/UDP 192.168.10.16:5060;rport=5060;branch=z9hG4bKPj526bbe6c3368479fbe8b9a1b8c3614 68 Supported: replaces Supported: 100rel Contact: <sip:8001 at 192.168.10.50> Content-Length: 0 User-Agent: TeleVantage-UA/7.50.4898 Server: TeleVantage-UA/7.50.4898 --end msg-- 01:14:52.193 tsx081A14CC Incoming Response msg 100/INVITE/cseq=11797 (rdata06D85874) in state Calling 01:14:52.193 tsx081A14CC State changed from Calling to Proceeding, event=RX_MSG 01:14:52.193 dlg081A00AC Received Response msg 100/INVITE/cseq=11797 (rdata06D85874) 01:14:52.193 dlg081A00AC Transaction tsx081A14CC state changed to Proceeding 01:14:52.197 sip_endpoint.c Processing incoming message: Response msg 400/INVITE/cseq=11797 (rdata06D85874) 01:14:52.197 pjsua_core.c RX 633 bytes Response msg 400/INVITE/cseq=11797 (rdata06D85874) from UDP 192.168.10.50:5060: SIP/2.0 400 Bad Request Call-ID: f231bc9ef2bd4a06afa46e22d404638a CSeq: 11797 INVITE From: "854" <sip:854@192.168.10.50>;tag=a1e2967c52824eba983bcd628601eda7 To: <sip:8001 at 192.168.10.50>;tag=192.168.10.50+1+2ea0004+e6f36bef Via: SIP/2.0/UDP 192.168.10.16:5060;rport=5060;branch=z9hG4bKPj526bbe6c3368479fbe8b9a1b8c3614 68 Supported: replaces Supported: 100rel Contact: <sip:8001 at 192.168.10.50> Content-Length: 0 Warning: 399 192.168.10.50 "SDP_GET_SESSION_INFO() failed; err:7('SDP_ERROR_MALFORMED_NUMBER') [pos 0 on line 'a=rtcp:4001 IN IP4 192.168.10.16" User-Agent: TeleVantage-UA/7.50.4898 Server: TeleVantage-UA/7.50.4898 --end msg-- 01:14:52.197 tsx081A14CC Incoming Response msg 400/INVITE/cseq=11797 (rdata06D85874) in state Proceeding 01:14:52.197 endpoint Request msg ACK/cseq=11797 (tdta08191068) created. 01:14:52.197 pjsua_core.c TX 362 bytes Request msg ACK/cseq=11797 (tdta08191068) to UDP 192.168.10.50:5060: ACK sip:8001 at 192.168.10.50 SIP/2.0 Via: SIP/2.0/UDP 192.168.10.16:5060;rport;branch=z9hG4bKPj526bbe6c3368479fbe8b9a1b8c361468 Max-Forwards: 70 From: "854" <sip:854@192.168.10.50>;tag=a1e2967c52824eba983bcd628601eda7 To: sip:8001 at 192.168.10.50;tag=192.168.10.50+1+2ea0004+e6f36bef Call-ID: f231bc9ef2bd4a06afa46e22d404638a CSeq: 11797 ACK Content-Length: 0 --end msg--