<------------> [Sep 29 09:59:03] VERBOSE[18322] logger.c: <--- SIP read from 174.142.75.171:5060 ---> INVITE sip:6134545618@69.70.111.174:5060 SIP/2.0 Via: SIP/2.0/UDP 174.142.75.171:5060;branch=z9hG4bK04c1aa6c;rport From: "BRAD BARNETT" ;tag=as020b7964 To: Contact: Call-ID: 6542e53d2c8698e8609df2b7435b5abc@174.142.75.171 CSeq: 102 INVITE User-Agent: VoIPMS/SERAST Max-Forwards: 70 Remote-Party-ID: "BRAD BARNETT" ;privacy=off;screen=no Date: Wed, 29 Sep 2010 13:59:01 GMT Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO Supported: replaces Content-Type: application/sdp Content-Length: 475 v=0 o=root 4729 4729 IN IP4 174.142.75.171 s=session c=IN IP4 174.142.75.171 t=0 0 m=audio 18882 RTP/AVP 0 3 8 112 5 10 7 18 111 101 a=rtpmap:0 PCMU/8000 a=rtpmap:3 GSM/8000 a=rtpmap:8 PCMA/8000 a=rtpmap:112 AAL2-G726-32/8000 a=rtpmap:5 DVI4/8000 a=rtpmap:10 L16/8000 a=rtpmap:7 LPC/8000 a=rtpmap:18 G729/8000 a=fmtp:18 annexb=no a=rtpmap:111 G726-32/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-16 a=silenceSupp:off - - - - a=ptime:20 a=sendrecv <-------------> [Sep 29 09:59:03] VERBOSE[18322] logger.c: --- (15 headers 21 lines) --- [Sep 29 09:59:03] VERBOSE[18322] logger.c: Sending to 174.142.75.171 : 5060 (NAT) [Sep 29 09:59:03] VERBOSE[18322] logger.c: Using INVITE request as basis request - 6542e53d2c8698e8609df2b7435b5abc@174.142.75.171 [Sep 29 09:59:03] VERBOSE[18322] logger.c: Found peer 'voipms' [Sep 29 09:59:03] VERBOSE[18322] logger.c: Found RTP audio format 0 [Sep 29 09:59:03] VERBOSE[18322] logger.c: Found RTP audio format 3 [Sep 29 09:59:03] VERBOSE[18322] logger.c: Found RTP audio format 8 [Sep 29 09:59:03] VERBOSE[18322] logger.c: Found RTP audio format 112 [Sep 29 09:59:03] VERBOSE[18322] logger.c: Found RTP audio format 5 [Sep 29 09:59:03] VERBOSE[18322] logger.c: Found RTP audio format 10 [Sep 29 09:59:03] VERBOSE[18322] logger.c: Found RTP audio format 7 [Sep 29 09:59:03] VERBOSE[18322] logger.c: Found RTP audio format 18 [Sep 29 09:59:03] VERBOSE[18322] logger.c: Found RTP audio format 111 [Sep 29 09:59:03] VERBOSE[18322] logger.c: Found RTP audio format 101 [Sep 29 09:59:03] VERBOSE[18322] logger.c: Peer audio RTP is at port 174.142.75.171:18882 [Sep 29 09:59:03] VERBOSE[18322] logger.c: Found audio description format PCMU for ID 0 [Sep 29 09:59:03] VERBOSE[18322] logger.c: Found audio description format GSM for ID 3 [Sep 29 09:59:03] VERBOSE[18322] logger.c: Found audio description format PCMA for ID 8 [Sep 29 09:59:03] VERBOSE[18322] logger.c: Found audio description format AAL2-G726-32 for ID 112 [Sep 29 09:59:03] VERBOSE[18322] logger.c: Found audio description format DVI4 for ID 5 [Sep 29 09:59:03] VERBOSE[18322] logger.c: Found audio description format L16 for ID 10 [Sep 29 09:59:03] VERBOSE[18322] logger.c: Found audio description format LPC for ID 7 [Sep 29 09:59:03] VERBOSE[18322] logger.c: Found audio description format G729 for ID 18 [Sep 29 09:59:03] VERBOSE[18322] logger.c: Found audio description format G726-32 for ID 111 [Sep 29 09:59:03] VERBOSE[18322] logger.c: Found audio description format telephone-event for ID 101 [Sep 29 09:59:03] VERBOSE[18322] logger.c: Capabilities: us - 0x4 (ulaw), peer - audio=0x9fe (gsm|ulaw|alaw|g726|adpcm|slin|lpc10|g729|g726aal2)/video=0x0 (nothing), combined - 0x4 (ulaw) [Sep 29 09:59:03] VERBOSE[18322] logger.c: Non-codec capabilities (dtmf): us - 0x1 (telephone-event), peer - 0x1 (telephone-event), combined - 0x1 (telephone-event) [Sep 29 09:59:03] VERBOSE[18322] logger.c: Peer audio RTP is at port 174.142.75.171:18882 [Sep 29 09:59:03] VERBOSE[18322] logger.c: Looking for 6134545618 in bell800 (domain 69.70.111.174) [Sep 29 09:59:03] VERBOSE[18322] logger.c: list_route: hop: [Sep 29 09:59:03] VERBOSE[18322] logger.c: <--- Transmitting (no NAT) to 174.142.75.171:5060 ---> SIP/2.0 100 Trying Via: SIP/2.0/UDP 174.142.75.171:5060;branch=z9hG4bK04c1aa6c;received=174.142.75.171;rport=5060 From: "BRAD BARNETT" ;tag=as020b7964 To: Call-ID: 6542e53d2c8698e8609df2b7435b5abc@174.142.75.171 CSeq: 102 INVITE User-Agent: Asterisk PBX Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY Supported: replaces Contact: Content-Length: 0 <------------> [Sep 29 09:59:03] VERBOSE[32419] logger.c: -- Executing [6134545618@bell800:1] Set("SIP/174.142.75.171-092d8c88", "rv=1285768743") in new stack [Sep 29 09:59:03] VERBOSE[32419] logger.c: -- Executing [6134545618@bell800:2] Macro("SIP/174.142.75.171-092d8c88", "calleridcleanup") in new stack [Sep 29 09:59:03] VERBOSE[32419] logger.c: -- Executing [s@macro-calleridcleanup:1] Set("SIP/174.142.75.171-092d8c88", "blah=6132619562") in new stack [Sep 29 09:59:03] VERBOSE[32419] logger.c: -- Executing [s@macro-calleridcleanup:2] GotoIf("SIP/174.142.75.171-092d8c88", "0?4:3") in new stack [Sep 29 09:59:03] VERBOSE[32419] logger.c: -- Goto (macro-calleridcleanup,s,3) [Sep 29 09:59:03] VERBOSE[32419] logger.c: -- Executing [s@macro-calleridcleanup:3] GotoIf("SIP/174.142.75.171-092d8c88", "0?6:7") in new stack [Sep 29 09:59:03] VERBOSE[32419] logger.c: -- Goto (macro-calleridcleanup,s,7) [Sep 29 09:59:03] VERBOSE[32419] logger.c: -- Executing [s@macro-calleridcleanup:7] Set("SIP/174.142.75.171-092d8c88", "CALLERID(num)=6132619562") in new stack [Sep 29 09:59:03] VERBOSE[32419] logger.c: -- Executing [6134545618@bell800:3] NoOp("SIP/174.142.75.171-092d8c88", "Caller: BRAD BARNETT 6132619562") in new stack [Sep 29 09:59:03] VERBOSE[32419] logger.c: -- Executing [6134545618@bell800:4] NoOp("SIP/174.142.75.171-092d8c88", "HMM 1285768743 1285768743 0") in new stack [Sep 29 09:59:03] VERBOSE[32419] logger.c: -- Executing [6134545618@bell800:5] GotoIf("SIP/174.142.75.171-092d8c88", "1?answer:skip") in new stack [Sep 29 09:59:03] VERBOSE[32419] logger.c: -- Goto (bell800,6134545618,6) [Sep 29 09:59:03] VERBOSE[32419] logger.c: -- Executing [6134545618@bell800:6] GotoIf("SIP/174.142.75.171-092d8c88", "0?6134545618|1000") in new stack [Sep 29 09:59:03] VERBOSE[32419] logger.c: -- Executing [6134545618@bell800:7] Set("SIP/174.142.75.171-092d8c88", "erks=1") in new stack [Sep 29 09:59:03] VERBOSE[32419] logger.c: -- Executing [6134545618@bell800:8] GotoIf("SIP/174.142.75.171-092d8c88", "0?6134545618|1000") in new stack [Sep 29 09:59:03] VERBOSE[32419] logger.c: -- Executing [6134545618@bell800:9] GotoIf("SIP/174.142.75.171-092d8c88", "0?6134545618|1000") in new stack [Sep 29 09:59:03] VERBOSE[32419] logger.c: -- Executing [6134545618@bell800:10] GotoIf("SIP/174.142.75.171-092d8c88", "0?6134545618|1000") in new stack [Sep 29 09:59:03] VERBOSE[32419] logger.c: -- Executing [6134545618@bell800:11] GotoIf("SIP/174.142.75.171-092d8c88", "0?6134545618|1000") in new stack [Sep 29 09:59:03] VERBOSE[32419] logger.c: -- Executing [6134545618@bell800:12] GotoIf("SIP/174.142.75.171-092d8c88", "0?6134545618|1000") in new stack [Sep 29 09:59:03] VERBOSE[32419] logger.c: -- Executing [6134545618@bell800:13] Answer("SIP/174.142.75.171-092d8c88", "") in new stack [Sep 29 09:59:03] VERBOSE[32419] logger.c: Audio is at 69.70.111.174 port 20844 [Sep 29 09:59:03] VERBOSE[32419] logger.c: Adding codec 0x4 (ulaw) to SDP [Sep 29 09:59:03] VERBOSE[32419] logger.c: Adding non-codec 0x1 (telephone-event) to SDP [Sep 29 09:59:03] VERBOSE[32419] logger.c: <--- Reliably Transmitting (no NAT) to 174.142.75.171:5060 ---> SIP/2.0 200 OK Via: SIP/2.0/UDP 174.142.75.171:5060;branch=z9hG4bK04c1aa6c;received=174.142.75.171;rport=5060 From: "BRAD BARNETT" ;tag=as020b7964 To: ;tag=as0ea9e956 Call-ID: 6542e53d2c8698e8609df2b7435b5abc@174.142.75.171 CSeq: 102 INVITE User-Agent: Asterisk PBX Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY Supported: replaces Contact: Content-Type: application/sdp Content-Length: 242 v=0 o=root 18290 18290 IN IP4 69.70.111.174 s=session c=IN IP4 69.70.111.174 t=0 0 m=audio 20844 RTP/AVP 0 101 a=rtpmap:0 PCMU/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-16 a=silenceSupp:off - - - - a=ptime:20 a=sendrecv <------------> [Sep 29 09:59:03] VERBOSE[32419] logger.c: -- Executing [6134545618@bell800:14] Goto("SIP/174.142.75.171-092d8c88", "8|voicemail") in new stack [Sep 29 09:59:03] VERBOSE[32419] logger.c: -- Goto (bell800,8,3) [Sep 29 09:59:03] VERBOSE[32419] logger.c: -- Executing [8@bell800:3] Answer("SIP/174.142.75.171-092d8c88", "") in new stack [Sep 29 09:59:03] VERBOSE[32419] logger.c: -- Executing [8@bell800:4] GotoIf("SIP/174.142.75.171-092d8c88", "1?record:skiprecord") in new stack [Sep 29 09:59:03] VERBOSE[32419] logger.c: -- Goto (bell800,8,5) [Sep 29 09:59:03] VERBOSE[32419] logger.c: -- Executing [8@bell800:5] Set("SIP/174.142.75.171-092d8c88", "CALLFILENAME=IN-6132619562.to.8-2010.Sep.29_09:59:03") in new stack [Sep 29 09:59:03] VERBOSE[32419] logger.c: -- Executing [8@bell800:6] Monitor("SIP/174.142.75.171-092d8c88", "wav|IN-6132619562.to.8-2010.Sep.29_09:59:03|m") in new stack [Sep 29 09:59:03] VERBOSE[18322] logger.c: <--- SIP read from 174.142.75.171:5060 ---> ACK sip:6134545618@69.70.111.174 SIP/2.0 Via: SIP/2.0/UDP 174.142.75.171:5060;branch=z9hG4bK7b752c65;rport From: "BRAD BARNETT" ;tag=as020b7964 To: ;tag=as0ea9e956 Contact: Call-ID: 6542e53d2c8698e8609df2b7435b5abc@174.142.75.171 CSeq: 102 ACK User-Agent: VoIPMS/SERAST Max-Forwards: 70 Remote-Party-ID: "BRAD BARNETT" ;privacy=off;screen=no Content-Length: 0 <-------------> [Sep 29 09:59:03] VERBOSE[18322] logger.c: --- (11 headers 0 lines) --- [Sep 29 09:59:03] ERROR[18322] chan_sip.c: We could NOT get the channel lock for SIP/174.142.75.171-092d8c88! [Sep 29 09:59:03] ERROR[18322] chan_sip.c: SIP transaction failed: 6542e53d2c8698e8609df2b7435b5abc@174.142.75.171 [Sep 29 09:59:03] VERBOSE[32419] logger.c: -- Executing [8@bell800:7] Ringing("SIP/174.142.75.171-092d8c88", "") in new stack [Sep 29 09:59:03] VERBOSE[32419] logger.c: -- Executing [8@bell800:8] Wait("SIP/174.142.75.171-092d8c88", "2") in new stack [Sep 29 09:59:04] VERBOSE[18322] logger.c: Retransmitting #1 (no NAT) to 174.142.75.171:5060: SIP/2.0 200 OK Via: SIP/2.0/UDP 174.142.75.171:5060;branch=z9hG4bK04c1aa6c;received=174.142.75.171;rport=5060 From: "BRAD BARNETT" ;tag=as020b7964 To: ;tag=as0ea9e956 Call-ID: 6542e53d2c8698e8609df2b7435b5abc@174.142.75.171 CSeq: 102 INVITE User-Agent: Asterisk PBX Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY Supported: replaces Contact: Content-Type: application/sdp Content-Length: 242 v=0 o=root 18290 18290 IN IP4 69.70.111.174 s=session c=IN IP4 69.70.111.174 t=0 0 m=audio 20844 RTP/AVP 0 101 a=rtpmap:0 PCMU/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-16 a=silenceSupp:off - - - - a=ptime:20 a=sendrecv --- [Sep 29 09:59:05] VERBOSE[18322] logger.c: Retransmitting #2 (no NAT) to 174.142.75.171:5060: SIP/2.0 200 OK Via: SIP/2.0/UDP 174.142.75.171:5060;branch=z9hG4bK04c1aa6c;received=174.142.75.171;rport=5060 From: "BRAD BARNETT" ;tag=as020b7964 To: ;tag=as0ea9e956 Call-ID: 6542e53d2c8698e8609df2b7435b5abc@174.142.75.171 CSeq: 102 INVITE User-Agent: Asterisk PBX Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY Supported: replaces Contact: Content-Type: application/sdp Content-Length: 242 v=0 o=root 18290 18290 IN IP4 69.70.111.174 s=session c=IN IP4 69.70.111.174 t=0 0 m=audio 20844 RTP/AVP 0 101 a=rtpmap:0 PCMU/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-16 a=silenceSupp:off - - - - a=ptime:20 a=sendrecv --- [Sep 29 09:59:05] VERBOSE[32419] logger.c: -- Executing [8@bell800:9] Playback("SIP/174.142.75.171-092d8c88", "wait-moment") in new stack [Sep 29 09:59:05] VERBOSE[32419] logger.c: -- Playing 'wait-moment' (language 'en') [Sep 29 09:59:07] VERBOSE[32419] logger.c: -- Executing [8@bell800:10] Set("SIP/174.142.75.171-092d8c88", "CALLERID(name)="CP:BRAD BARNETT"") in new stack [Sep 29 09:59:07] VERBOSE[32419] logger.c: -- Executing [8@bell800:11] Dial("SIP/174.142.75.171-092d8c88", "Zap/3|20") in new stack [Sep 29 09:59:07] VERBOSE[32419] logger.c: -- Called 3 [Sep 29 09:59:07] VERBOSE[32419] logger.c: -- Zap/3-1 is ringing [Sep 29 09:59:07] VERBOSE[18322] logger.c: Retransmitting #3 (no NAT) to 174.142.75.171:5060: SIP/2.0 200 OK Via: SIP/2.0/UDP 174.142.75.171:5060;branch=z9hG4bK04c1aa6c;received=174.142.75.171;rport=5060 From: "BRAD BARNETT" ;tag=as020b7964 To: ;tag=as0ea9e956 Call-ID: 6542e53d2c8698e8609df2b7435b5abc@174.142.75.171 CSeq: 102 INVITE User-Agent: Asterisk PBX Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY Supported: replaces Contact: Content-Type: application/sdp Content-Length: 242 v=0 o=root 18290 18290 IN IP4 69.70.111.174 s=session c=IN IP4 69.70.111.174 t=0 0 m=audio 20844 RTP/AVP 0 101 a=rtpmap:0 PCMU/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-16 a=silenceSupp:off - - - - a=ptime:20 a=sendrecv --- [Sep 29 09:59:09] VERBOSE[32419] logger.c: -- Zap/3-1 is ringing [Sep 29 09:59:11] VERBOSE[18322] logger.c: Retransmitting #4 (no NAT) to 174.142.75.171:5060: SIP/2.0 200 OK Via: SIP/2.0/UDP 174.142.75.171:5060;branch=z9hG4bK04c1aa6c;received=174.142.75.171;rport=5060 From: "BRAD BARNETT" ;tag=as020b7964 To: ;tag=as0ea9e956 Call-ID: 6542e53d2c8698e8609df2b7435b5abc@174.142.75.171 CSeq: 102 INVITE User-Agent: Asterisk PBX Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY Supported: replaces Contact: Content-Type: application/sdp Content-Length: 242 v=0 o=root 18290 18290 IN IP4 69.70.111.174 s=session c=IN IP4 69.70.111.174 t=0 0 m=audio 20844 RTP/AVP 0 101 a=rtpmap:0 PCMU/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-16 a=silenceSupp:off - - - - a=ptime:20 a=sendrecv --- [Sep 29 09:59:15] VERBOSE[32419] logger.c: -- Zap/3-1 is ringing [Sep 29 09:59:15] VERBOSE[18322] logger.c: Retransmitting #5 (no NAT) to 174.142.75.171:5060: SIP/2.0 200 OK Via: SIP/2.0/UDP 174.142.75.171:5060;branch=z9hG4bK04c1aa6c;received=174.142.75.171;rport=5060 From: "BRAD BARNETT" ;tag=as020b7964 To: ;tag=as0ea9e956 Call-ID: 6542e53d2c8698e8609df2b7435b5abc@174.142.75.171 CSeq: 102 INVITE User-Agent: Asterisk PBX Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY Supported: replaces Contact: Content-Type: application/sdp Content-Length: 242 v=0 o=root 18290 18290 IN IP4 69.70.111.174 s=session c=IN IP4 69.70.111.174 t=0 0 m=audio 20844 RTP/AVP 0 101 a=rtpmap:0 PCMU/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-16 a=silenceSupp:off - - - - a=ptime:20 a=sendrecv --- [Sep 29 09:59:19] VERBOSE[18322] logger.c: Retransmitting #6 (no NAT) to 174.142.75.171:5060: SIP/2.0 200 OK Via: SIP/2.0/UDP 174.142.75.171:5060;branch=z9hG4bK04c1aa6c;received=174.142.75.171;rport=5060 From: "BRAD BARNETT" ;tag=as020b7964 To: ;tag=as0ea9e956 Call-ID: 6542e53d2c8698e8609df2b7435b5abc@174.142.75.171 CSeq: 102 INVITE User-Agent: Asterisk PBX Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY Supported: replaces Contact: Content-Type: application/sdp Content-Length: 242 v=0 o=root 18290 18290 IN IP4 69.70.111.174 s=session c=IN IP4 69.70.111.174 t=0 0 m=audio 20844 RTP/AVP 0 101 a=rtpmap:0 PCMU/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-16 a=silenceSupp:off - - - - a=ptime:20 a=sendrecv --- [Sep 29 09:59:21] VERBOSE[32419] logger.c: -- Zap/3-1 is ringing [Sep 29 09:59:23] WARNING[18322] chan_sip.c: Maximum retries exceeded on transmission 6542e53d2c8698e8609df2b7435b5abc@174.142.75.171 for seqno 102 (Critical Response) [Sep 29 09:59:23] WARNING[18322] chan_sip.c: Hanging up call 6542e53d2c8698e8609df2b7435b5abc@174.142.75.171 - no reply to our critical packet. [Sep 29 09:59:23] VERBOSE[32419] logger.c: -- Hungup 'Zap/3-1' [Sep 29 09:59:23] VERBOSE[32419] logger.c: == Spawn extension (bell800, 8, 11) exited non-zero on 'SIP/174.142.75.171-092d8c88' [Sep 29 09:59:23] NOTICE[32419] res_monitor.c: monitor executing /usr/local/bin/asterisk.wav.conv.sh "/var/spool/asterisk/monitor/IN-6132619562.to.8-2010.Sep.29_09:59:03-in.wav" "/var/spool/asterisk/monitor/IN-6132619562.to.8-2010.Sep.29_09:59:03-out.wav" "/var/spool/asterisk/monitor/IN-6132619562.to.8-2010.Sep.29_09:59:03.wav" & [Sep 29 09:59:23] VERBOSE[18322] logger.c: Really destroying SIP dialog '6542e53d2c8698e8609df2b7435b5abc@174.142.75.171' Method: INVITE [Sep 29 09:59:28] VERBOSE[18322] logger.c: <--- SIP read from 174.142.75.171:5060 ---> BYE sip:6134545618@69.70.111.174 SIP/2.0 Via: SIP/2.0/UDP 174.142.75.171:5060;branch=z9hG4bK39552f30;rport From: "BRAD BARNETT" ;tag=as020b7964 To: ;tag=as0ea9e956 Call-ID: 6542e53d2c8698e8609df2b7435b5abc@174.142.75.171 CSeq: 103 BYE User-Agent: VoIPMS/SERAST Max-Forwards: 70 Remote-Party-ID: "BRAD BARNETT" ;privacy=off;screen=no X-Asterisk-HangupCause: Normal Clearing X-Asterisk-HangupCauseCode: 16 Content-Length: 0 <-------------> [Sep 29 09:59:28] VERBOSE[18322] logger.c: --- (12 headers 0 lines) --- [Sep 29 09:59:28] VERBOSE[18322] logger.c: Sending to 174.142.75.171 : 5060 (NAT) [Sep 29 09:59:28] VERBOSE[18322] logger.c: <--- Transmitting (NAT) to 174.142.75.171:5060 ---> SIP/2.0 481 Call leg/transaction does not exist Via: SIP/2.0/UDP 174.142.75.171:5060;branch=z9hG4bK39552f30;received=174.142.75.171;rport=5060 From: "BRAD BARNETT" ;tag=as020b7964 To: ;tag=as0ea9e956 Call-ID: 6542e53d2c8698e8609df2b7435b5abc@174.142.75.171 CSeq: 103 BYE User-Agent: Asterisk PBX Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY Supported: replaces Content-Length: 0 <------------>