Apparently, there is a SIP(diversionheader) field that fixes the problem below, but I cannot find any docs or examples of how to use it in my dialplan. Any help would be appreciated. We have a Cisco CallManager where users forward their numbers, so PSTN->PSTN calls get this error... -Greg <--- SIP read from 209.253.136.204:5060 ---> INVITE sip:9723814678 at 209.33.163.37;transport=UDP SIP/2.0 From: "Cell Phone TX"<sip:2142080740 at 209.253.136.204>;tag=501ff0a-13c4-4807c9fe-a5bac2-7f73fc7a To: "CISTERA 9723814678"<sip:9723814678 at mcleodusa> Call-ID: CXC-34-68a7e0e0-501ff0a-13c4-4807c9fe-a5bac2-72ed9e9c at 209.253.136.204 CSeq: 1 INVITE Via: SIP/2.0/UDP 209.253.136.204:5060;branch=z9hG4bK-301-4807c9fe-a5bac2-5babdc2b Allow: ACK,BYE,CANCEL,INFO,INVITE,OPTIONS,PRACK,REFER,NOTIFY Supported: timer Accept: multipart/mixed,application/media_control+xml,application/sdp Max-Forwards: 9 Min-SE: 60 Contact: <sip:2142080740 at 209.253.136.204:5060;transport=UDP> Content-Type: application/sdp Content-Length: 500 v=0 o=BroadWorks 31324769 1 IN IP4 209.253.136.204 s=- c=IN IP4 209.253.136.204 t=0 0 m=audio 24418 RTP/AVP 18 0 8 101 a=rtpmap:18 G729/8000 a=rtpmap:0 PCMU/8000 a=rtpmap:8 PCMA/8000 a=rtpmap:101 telephone-event/8000 a=ptime:20 a=fmtp:101 0-15 a=fmtp:18 annexb=no a=x-cxc-sess:04c2e65cf9a2aa97-1 a=x-cxc-info:cGVlci1wdWI9NjQuMTk5LjUxLjIxMDtwZWVyLXNkcD0yMDkuMjUzLjEyOS4xNTc6MjYzMDY7 a=x-cxc-info:cGVlci1yb3V0ZS10YWc9aW50ZXJuYWw7YW5jaG9yLWRzdD0yMDkuMjUzLjEzNi4yMDQ6MjQ0MTg7 a=sendrecv <-------------> --- (14 headers 17 lines) --- Sending to 209.253.136.204 : 5060 (no NAT) Using INVITE request as basis request - CXC-34-68a7e0e0-501ff0a-13c4-4807c9fe-a5bac2-72ed9e9c at 209.253.136.204 Found peer 'McLeodUSA' Found RTP audio format 18 Found RTP audio format 0 Found RTP audio format 8 Found RTP audio format 101 Peer audio RTP is at port 209.253.136.204:24418 Found audio description format G729 for ID 18 Found audio description format PCMU for ID 0 Found audio description format PCMA for ID 8 Found audio description format telephone-event for ID 101 Capabilities: us - 0x4 (ulaw), peer - audio=0x10c (ulaw|alaw| g729)/video=0x0 (nothing), combined - 0x4 (ulaw) Non-codec capabilities (dtmf): us - 0x1 (telephone-event), peer - 0x1 (telephone-event), combined - 0x1 (telephone-event) Peer audio RTP is at port 209.253.136.204:24418 Looking for 9723814678 in default (domain 209.33.163.37) list_route: hop: <sip:2142080740 at 209.253.136.204:5060;transport=UDP> ns2*CLI> <--- Transmitting (no NAT) to 209.253.136.204:5060 ---> SIP/2.0 100 Trying Via: SIP/2.0/UDP 209.253.136.204:5060;branch=z9hG4bK-301-4807c9fe-a5bac2-5babdc2b;received=209.253.136.204 From: "Cell Phone TX"<sip:2142080740 at 209.253.136.204>;tag=501ff0a-13c4-4807c9fe-a5bac2-7f73fc7a To: "CISTERA 9723814678"<sip:9723814678 at mcleodusa> Call-ID: CXC-34-68a7e0e0-501ff0a-13c4-4807c9fe-a5bac2-72ed9e9c at 209.253.136.204 CSeq: 1 INVITE User-Agent: Asterisk PBX Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY Supported: replaces Contact: <sip:9723814678 at 209.33.163.37> Content-Length: 0 <------------> -- Executing [9723814678 at default:1] Dial("SIP/4693412073-08fdbf78", "SIP/4678 at 192.168.5.10") in new stack Audio is at 192.168.5.14 port 13374 Adding codec 0x4 (ulaw) to SDP Adding non-codec 0x1 (telephone-event) to SDP Reliably Transmitting (no NAT) to 192.168.5.10:5060: INVITE sip:4678 at 192.168.5.10 SIP/2.0 Via: SIP/2.0/UDP 192.168.5.14:5060;branch=z9hG4bK4a44607b;rport From: "Cell Phone TX" <sip:2142080740 at 192.168.5.14>;tag=as178544f0 To: <sip:4678 at 192.168.5.10> Contact: <sip:2142080740 at 192.168.5.14> Call-ID: 6eaabaa87a62e3f81a8effcf3cc7fce6 at 192.168.5.14 CSeq: 102 INVITE User-Agent: Asterisk PBX Max-Forwards: 70 Date: Thu, 17 Apr 2008 22:08:43 GMT Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY Supported: replaces Content-Type: application/sdp Content-Length: 240 v=0 o=root 28662 28662 IN IP4 192.168.5.14 s=session c=IN IP4 192.168.5.14 t=0 0 m=audio 13374 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 --- -- Called 4678 at 192.168.5.10 ns2*CLI> <--- SIP read from 192.168.5.10:49365 ---> SIP/2.0 100 Trying Via: SIP/2.0/UDP 192.168.5.14:5060;branch=z9hG4bK4a44607b;rport From: "Cell Phone TX" <sip:2142080740 at 192.168.5.14>;tag=as178544f0 To: <sip:4678 at 192.168.5.10>;tag=16863906 Date: Thu, 17 Apr 2008 22:06:54 GMT Call-ID: 6eaabaa87a62e3f81a8effcf3cc7fce6 at 192.168.5.14 CSeq: 102 INVITE Allow-Events: telephone-event Content-Length: 0 <-------------> --- (9 headers 0 lines) --- ns2*CLI> <--- SIP read from 192.168.5.10:6060 ---> INVITE sip:18005551212 at 192.168.5.14:5060 SIP/2.0 Via: SIP/2.0/UDP 192.168.5.10:6060;branch=z9hG4bK32426484 From: "Cell Phone TX" <sip:2142080740 at 192.168.5.10>;tag=16863908 To: <sip:18005551212 at 192.168.5.14> Date: Thu, 17 Apr 2008 22:06:55 GMT Call-ID: 95f1af00-1de12acd-10153-a05a8c0 at 192.168.5.10 Supported: timer Min-SE: 1800 User-Agent: Cisco-CCM4.1 Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK CSeq: 101 INVITE Max-Forwards: 70 Remote-Party-ID: "Cell Phone TX" <sip:2142080740 at 192.168.5.10>;party=calling;screen=no;privacy=off Contact: <sip:2142080740 at 192.168.5.10:6060> Expires: 180 Allow-Events: telephone-event Content-Type: application/sdp Content-Length: 227 v=0 o=CiscoSystemsCCM-SIP 2000 1000 IN IP4 192.168.5.10 s=SIP Call c=IN IP4 192.168.5.10 t=0 0 m=audio 29150 RTP/AVP 0 101 a=sendrecv a=rtpmap:0 PCMU/8000 a=ptime:20 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-15 <-------------> --- (18 headers 11 lines) --- Sending to 192.168.5.10 : 6060 (no NAT) Using INVITE request as basis request - 95f1af00-1de12acd-10153-a05a8c0 at 192.168.5.10 Found peer 'Publisher' Found RTP audio format 0 Found RTP audio format 101 Peer audio RTP is at port 192.168.5.10:29150 Found audio description format PCMU for ID 0 Found audio description format telephone-event for ID 101 Capabilities: us - 0x4 (ulaw), peer - audio=0x4 (ulaw)/video=0x0 (nothing), combined - 0x4 (ulaw) Non-codec capabilities (dtmf): us - 0x1 (telephone-event), peer - 0x1 (telephone-event), combined - 0x1 (telephone-event) Peer audio RTP is at port 192.168.5.10:29150 Looking for 18005551212 in default (domain 192.168.5.14) list_route: hop: <sip:2142080740 at 192.168.5.10:6060> <--- Transmitting (no NAT) to 192.168.5.10:6060 ---> SIP/2.0 100 Trying Via: SIP/2.0/UDP 192.168.5.10:6060;branch=z9hG4bK32426484;received=192.168.5.10 From: "Cell Phone TX" <sip:2142080740 at 192.168.5.10>;tag=16863908 To: <sip:18005551212 at 192.168.5.14> Call-ID: 95f1af00-1de12acd-10153-a05a8c0 at 192.168.5.10 CSeq: 101 INVITE User-Agent: Asterisk PBX Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY Supported: replaces Contact: <sip:18005551212 at 192.168.5.14> Content-Length: 0 <------------> -- Executing [18005551212 at default:1] Dial("SIP/192.168.5.10-08ff1690", "SIP/18005551212 at McLeodUSA") in new stack Audio is at 209.33.163.37 port 11122 Adding codec 0x4 (ulaw) to SDP Adding non-codec 0x1 (telephone-event) to SDP Reliably Transmitting (no NAT) to 209.253.136.204:5060: INVITE sip:18005551212 at bwas2.global.voip.mcleodusa.net SIP/2.0 Via: SIP/2.0/UDP 209.33.163.37:5060;branch=z9hG4bK005731d8;rport From: "Cell Phone TX" <sip:2142080740 at bwas2.global.voip.mcleodusa.net>;tag=as370c4a2f To: <sip:18005551212 at bwas2.global.voip.mcleodusa.net> Contact: <sip:2142080740 at 209.33.163.37> Call-ID: 672fb64337c1f37018257b280c95c194 at bwas2.global.voip.mcleodusa.net CSeq: 102 INVITE User-Agent: Asterisk PBX Max-Forwards: 70 Date: Thu, 17 Apr 2008 22:08:44 GMT Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY Supported: replaces Content-Type: application/sdp Content-Length: 242 v=0 o=root 28662 28662 IN IP4 209.33.163.37 s=session c=IN IP4 209.33.163.37 t=0 0 m=audio 11122 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 --- -- Called 18005551212 at McLeodUSA ns2*CLI> <--- SIP read from 209.253.136.204:5060 ---> SIP/2.0 100 Trying From: "Cell Phone TX"<sip:2142080740 at bwas2.global.voip.mcleodusa.net>;tag=as370c4a2f To: <sip:18005551212 at bwas2.global.voip.mcleodusa.net>;tag=501ff0a-13c4-4807c9fe-a5bb83-2b952534 Call-ID: 672fb64337c1f37018257b280c95c194 at bwas2.global.voip.mcleodusa.net CSeq: 102 INVITE Via: SIP/2.0/UDP 209.33.163.37:5060;rport=5060;branch=z9hG4bK005731d8 Contact: <sip:18005551212 at 209.253.136.204:5060;transport=UDP> Content-Length: 0 <-------------> --- (8 headers 0 lines) --- ns2*CLI> <--- SIP read from 209.253.136.204:5060 ---> SIP/2.0 604 Does not exist anywhere From: "Cell Phone TX"<sip:2142080740 at bwas2.global.voip.mcleodusa.net>;tag=as370c4a2f To: <sip:18005551212 at bwas2.global.voip.mcleodusa.net>;tag=501ff0a-13c4-4807c9fe-a5bb83-2b952534 Call-ID: 672fb64337c1f37018257b280c95c194 at bwas2.global.voip.mcleodusa.net CSeq: 102 INVITE Via: SIP/2.0/UDP 209.33.163.37:5060;rport=5060;branch=z9hG4bK005731d8 Content-Length: 0 <-------------> --- (7 headers 0 lines) --- -- Got SIP response 604 "Does not exist anywhere" back from 209.253.136.204 Transmitting (no NAT) to 209.253.136.204:5060: ACK sip:18005551212 at bwas2.global.voip.mcleodusa.net SIP/2.0 Via: SIP/2.0/UDP 209.33.163.37:5060;branch=z9hG4bK005731d8;rport From: "Cell Phone TX" <sip:2142080740 at bwas2.global.voip.mcleodusa.net>;tag=as370c4a2f To: <sip:18005551212 at bwas2.global.voip.mcleodusa.net>;tag=501ff0a-13c4-4807c9fe-a5bb83-2b952534 Contact: <sip:2142080740 at 209.33.163.37> Call-ID: 672fb64337c1f37018257b280c95c194 at bwas2.global.voip.mcleodusa.net CSeq: 102 ACK User-Agent: Asterisk PBX Max-Forwards: 70 Content-Length: 0 --- == Everyone is busy/congested at this time (1:0/0/1) == Auto fallthrough, channel 'SIP/192.168.5.10-08ff1690' status is 'CHANUNAVAIL' <--- Transmitting (no NAT) to 192.168.5.10:6060 ---> SIP/2.0 503 Service Unavailable Via: SIP/2.0/UDP 192.168.5.10:6060;branch=z9hG4bK32426484;received=192.168.5.10 From: "Cell Phone TX" <sip:2142080740 at 192.168.5.10>;tag=16863908 To: <sip:18005551212 at 192.168.5.14>;tag=as07fb43c0 Call-ID: 95f1af00-1de12acd-10153-a05a8c0 at 192.168.5.10 CSeq: 101 INVITE User-Agent: Asterisk PBX Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY Supported: replaces Contact: <sip:18005551212 at 192.168.5.14> Content-Length: 0 X-Asterisk-HangupCause: Unallocated (unassigned) number X-Asterisk-HangupCauseCode: 1 <------------> ns2*CLI> <--- SIP read from 192.168.5.10:6060 ---> ACK sip:18005551212 at 192.168.5.14:5060 SIP/2.0 Via: SIP/2.0/UDP 192.168.5.10:6060;branch=z9hG4bK32426484 From: "Cell Phone TX" <sip:2142080740 at 192.168.5.10>;tag=16863908 To: <sip:18005551212 at 192.168.5.14>;tag=as07fb43c0 Date: Thu, 17 Apr 2008 22:06:55 GMT Call-ID: 95f1af00-1de12acd-10153-a05a8c0 at 192.168.5.10 Max-Forwards: 70 CSeq: 101 ACK Content-Length: 0 <-------------> --- (9 headers 0 lines) --- Really destroying SIP dialog '672fb64337c1f37018257b280c95c194 at bwas2.global.voip.mcleodusa.net' Method: INVITE Really destroying SIP dialog '95f1af00-1de12acd-10153-a05a8c0 at 192.168.5.10' Method: ACK ns2*CLI> <--- SIP read from 192.168.5.10:49365 ---> SIP/2.0 500 Internal Server Error Via: SIP/2.0/UDP 192.168.5.14:5060;branch=z9hG4bK4a44607b;rport From: "Cell Phone TX" <sip:2142080740 at 192.168.5.14>;tag=as178544f0 To: <sip:4678 at 192.168.5.10>;tag=16863906 Date: Thu, 17 Apr 2008 22:06:54 GMT Call-ID: 6eaabaa87a62e3f81a8effcf3cc7fce6 at 192.168.5.14 CSeq: 102 INVITE Allow-Events: telephone-event Content-Length: 0 <-------------> --- (9 headers 0 lines) --- -- Got SIP response 500 "Internal Server Error" back from 192.168.5.10 Transmitting (no NAT) to 192.168.5.10:5060: ACK sip:4678 at 192.168.5.10 SIP/2.0 Via: SIP/2.0/UDP 192.168.5.14:5060;branch=z9hG4bK4a44607b;rport From: "Cell Phone TX" <sip:2142080740 at 192.168.5.14>;tag=as178544f0 To: <sip:4678 at 192.168.5.10>;tag=16863906 Contact: <sip:2142080740 at 192.168.5.14> Call-ID: 6eaabaa87a62e3f81a8effcf3cc7fce6 at 192.168.5.14 CSeq: 102 ACK User-Agent: Asterisk PBX Max-Forwards: 70 Content-Length: 0 --- -- SIP/192.168.5.10-08fd84c0 is circuit-busy == Everyone is busy/congested at this time (1:0/1/0) == Auto fallthrough, channel 'SIP/4693412073-08fdbf78' status is 'CONGESTION' <--- Transmitting (no NAT) to 209.253.136.204:5060 ---> SIP/2.0 503 Service Unavailable Via: SIP/2.0/UDP 209.253.136.204:5060;branch=z9hG4bK-301-4807c9fe-a5bac2-5babdc2b;received=209.253.136.204 From: "Cell Phone TX"<sip:2142080740 at 209.253.136.204>;tag=501ff0a-13c4-4807c9fe-a5bac2-7f73fc7a To: "CISTERA 9723814678"<sip:9723814678 at mcleodusa>;tag=as2df2b0f6 Call-ID: CXC-34-68a7e0e0-501ff0a-13c4-4807c9fe-a5bac2-72ed9e9c at 209.253.136.204 CSeq: 1 INVITE User-Agent: Asterisk PBX Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY Supported: replaces Contact: <sip:9723814678 at 209.33.163.37> Content-Length: 0 X-Asterisk-HangupCause: Network out of order X-Asterisk-HangupCauseCode: 38 <------------> ns2*CLI> <--- SIP read from 209.253.136.204:5060 ---> ACK sip:9723814678 at 209.33.163.37;transport=UDP SIP/2.0 From: "Cell Phone TX"<sip:2142080740 at 209.253.136.204>;tag=501ff0a-13c4-4807c9fe-a5bac2-7f73fc7a To: "CISTERA 9723814678"<sip:9723814678 at mcleodusa>;tag=as2df2b0f6 Call-ID: CXC-34-68a7e0e0-501ff0a-13c4-4807c9fe-a5bac2-72ed9e9c at 209.253.136.204 CSeq: 1 ACK Via: SIP/2.0/UDP 209.253.136.204:5060;branch=z9hG4bK-301-4807c9fe-a5bac2-5babdc2b Max-Forwards: 69 Contact: <sip:2142080740 at 209.253.136.204:5060;transport=UDP> Content-Length: 0 <-------------> --- (9 headers 0 lines) --- Really destroying SIP dialog '6eaabaa87a62e3f81a8effcf3cc7fce6 at 192.168.5.14' Method: INVITE Really destroying SIP dialog 'CXC-34-68a7e0e0-501ff0a-13c4-4807c9fe-a5bac2-72ed9e9c at 209.253.136.204' Method: ACK ns2*CLI> <--- SIP read from 209.253.136.204:5060 ---> INVITE sip:9723814678 at 209.33.163.37;transport=UDP SIP/2.0 From: "Cell Phone TX"<sip:2142080740 at 209.253.136.204>;tag=501ff0a-13c4-4807c9fe-a5bc2c-1049ecf6 To: "CISTERA 9723814678"<sip:9723814678 at mcleodusa> Call-ID: CXC-123-68a805e0-501ff0a-13c4-4807c9fe-a5bc2c-418ea3b8 at 209.253.136.204 CSeq: 1 INVITE Via: SIP/2.0/UDP 209.253.136.204:5060;branch=z9hG4bK-303-4807c9fe-a5bc2c-31f108f7 Allow: ACK,BYE,CANCEL,INFO,INVITE,OPTIONS,PRACK,REFER,NOTIFY Supported: timer Accept: multipart/mixed,application/media_control+xml,application/sdp Max-Forwards: 9 Min-SE: 60 Contact: <sip:2142080740 at 209.253.136.204:5060;transport=UDP> Content-Type: application/sdp Content-Length: 502 v=0 o=BroadWorks 208497 1 IN IP4 209.253.136.204 s=- c=IN IP4 209.253.136.204 t=0 0 m=audio 24424 RTP/AVP 18 0 8 101 a=rtpmap:18 G729/8000 a=rtpmap:0 PCMU/8000 a=rtpmap:8 PCMA/8000 a=rtpmap:101 telephone-event/8000 a=ptime:20 a=fmtp:101 0-15 a=fmtp:18 annexb=no a=x-cxc-sess:04c2e65cf9b3e3a0-1 a=x-cxc-info:cGVlci1wdWI9MjA5LjI1My4xMzQuNjM7cGVlci1zZHA9MjA5LjI1My4xMjkuMTU3OjI2MzA2Ow=a=x-cxc-info:cGVlci1yb3V0ZS10YWc9aW50ZXJuYWw7YW5jaG9yLWRzdD0yMDkuMjUzLjEzNi4yMDQ6MjQ0MjQ7 a=sendrecv <-------------> --- (14 headers 17 lines) --- Sending to 209.253.136.204 : 5060 (no NAT) Using INVITE request as basis request - CXC-123-68a805e0-501ff0a-13c4-4807c9fe-a5bc2c-418ea3b8 at 209.253.136.204 Found peer 'McLeodUSA' Found RTP audio format 18 Found RTP audio format 0 Found RTP audio format 8 Found RTP audio format 101 Peer audio RTP is at port 209.253.136.204:24424 Found audio description format G729 for ID 18 Found audio description format PCMU for ID 0 Found audio description format PCMA for ID 8 Found audio description format telephone-event for ID 101 Capabilities: us - 0x4 (ulaw), peer - audio=0x10c (ulaw|alaw| g729)/video=0x0 (nothing), combined - 0x4 (ulaw) Non-codec capabilities (dtmf): us - 0x1 (telephone-event), peer - 0x1 (telephone-event), combined - 0x1 (telephone-event) Peer audio RTP is at port 209.253.136.204:24424 Looking for 9723814678 in default (domain 209.33.163.37) list_route: hop: <sip:2142080740 at 209.253.136.204:5060;transport=UDP> <--- Transmitting (no NAT) to 209.253.136.204:5060 ---> SIP/2.0 100 Trying Via: SIP/2.0/UDP 209.253.136.204:5060;branch=z9hG4bK-303-4807c9fe-a5bc2c-31f108f7;received=209.253.136.204 From: "Cell Phone TX"<sip:2142080740 at 209.253.136.204>;tag=501ff0a-13c4-4807c9fe-a5bc2c-1049ecf6 To: "CISTERA 9723814678"<sip:9723814678 at mcleodusa> Call-ID: CXC-123-68a805e0-501ff0a-13c4-4807c9fe-a5bc2c-418ea3b8 at 209.253.136.204 CSeq: 1 INVITE User-Agent: Asterisk PBX Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY Supported: replaces Contact: <sip:9723814678 at 209.33.163.37> Content-Length: 0 <------------> -- Executing [9723814678 at default:1] Dial("SIP/4693412073-08fdbf78", "SIP/4678 at 192.168.5.10") in new stack Audio is at 192.168.5.14 port 15932 Adding codec 0x4 (ulaw) to SDP Adding non-codec 0x1 (telephone-event) to SDP Reliably Transmitting (no NAT) to 192.168.5.10:5060: INVITE sip:4678 at 192.168.5.10 SIP/2.0 Via: SIP/2.0/UDP 192.168.5.14:5060;branch=z9hG4bK5d9871a5;rport From: "Cell Phone TX" <sip:2142080740 at 192.168.5.14>;tag=as09ed2d26 To: <sip:4678 at 192.168.5.10> Contact: <sip:2142080740 at 192.168.5.14> Call-ID: 37d8007908e2a8ee5aadcded77f3bc0d at 192.168.5.14 CSeq: 102 INVITE User-Agent: Asterisk PBX Max-Forwards: 70 Date: Thu, 17 Apr 2008 22:08:44 GMT Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY Supported: replaces Content-Type: application/sdp Content-Length: 240 v=0 o=root 28662 28662 IN IP4 192.168.5.14 s=session c=IN IP4 192.168.5.14 t=0 0 m=audio 15932 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