<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Hello,<div class=""><br class=""></div><div class="">I made lots of tests in order to make Kamailio act as a topology hiding proxy,</div><div class="">but i always got problems when using topos to store needed Route and Record-Route informations.</div><div class=""><br class=""></div><div class="">I thought that was because of possible error(s) playing with :</div><div class="">- socket binding</div><div class="">- destination tweaking</div><div class="">that may have lead to transaction breaking, so i decided to use NAT mode (even if that only can be temporary).</div><div class=""><br class=""></div><div class="">My problem is the same. I have not found any way to influence TOPOS on the domain it use on the « Contact » header.</div><div class=""><br class=""></div><div class="">Everything is getting well, iPs on Contact Header are toggled between external and internal sides, until RE-INVITE.</div><div class="">From there, Contact domain are no more toggled, and so:</div><div class="">- Public IP appear on Private side : i can manage my divide to force it to reply to the sender of the request instead of the contact</div><div class="">- Private IP appear on Public side : i can’t do anything to make the external side ignore contact’s domain</div><div class=""><br class=""></div><div class="">I wonder if that is a bug, related to RE-INVITE, or if there is any variable i can change to say topos which domain to be advertised on Contact headers?</div><div class=""><br class=""></div><div class=""><br class=""></div><div class=""><br class=""></div><div class=""><br class=""></div><div class=""><span class="Apple-tab-span" style="white-space:pre"> </span>PUBLIC NETWORK SIDE<span class="Apple-tab-span" style="white-space:pre"> </span>RFC6598 NETWORK SIDE</div><div class=""><span class="Apple-tab-span" style="white-space:pre"> </span>—————————</div><div class=""><span class="Apple-tab-span" style="white-space:pre"> </span>|<span class="Apple-tab-span" style="white-space:pre"> </span>|</div><div class="">PROVIDER Y.Y.Y.Y———————X.X.X.X—| <span class="Apple-tab-span" style="white-space: pre;"> </span>KAMAILIO<span class="Apple-tab-span" style="white-space: pre;"> </span>]—100.64.10.1————————<span class="Apple-tab-span" style="white-space: pre;"> </span>100.64.10.2 ASTERISK (or anything else)</div><div class=""><div class=""><span class="Apple-tab-span" style="white-space: pre;"> </span>|<span class="Apple-tab-span" style="white-space:pre"> </span>|</div></div><div class=""><span class="Apple-tab-span" style="white-space: pre;"> </span>—————————</div><div class=""><br class=""></div><div class=""><br class=""></div><div class=""><br class=""></div><div class="">20:58:46.215911 IP 100.64.10.2.5060 > 100.64.10.1.5060: SIP, length: 1004</div><div class=""><div class="">INVITE <a href="sip:+0598@100.64.10.1;user=phone" class="">sip:+0598@100.64.10.1;user=phone</a> SIP/2.0</div><div class="">Via: SIP/2.0/UDP 100.64.10.2:5060;branch=z9hG4bK38ea6539;rport</div><div class="">Max-Forwards: 70</div><div class="">From: "FAX" <<a href="sip:+9997@100.64.10.2" class="">sip:+9997@100.64.10.2</a>>;tag=as4cfa9905</div><div class="">To: <<a href="sip:+0598@100.64.10.1;user=phone" class="">sip:+0598@100.64.10.1;user=phone</a>></div><div class="">Contact: <<a href="sip:+9997@100.64.10.2:5060" class="">sip:+9997@100.64.10.2:5060</a>></div><div class="">Call-ID: <a href="mailto:1c9fb2447f3f72732a83aafa6a3e3017@100.64.10.2" class="">1c9fb2447f3f72732a83aafa6a3e3017@100.64.10.2</a>:5060</div><div class="">CSeq: 102 INVITE</div><div class="">User-Agent: Asterisk PBX 13.13.1</div><div class="">Date: Thu, 29 Dec 2016 19:59:36 GMT</div><div class="">Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE</div><div class="">Supported: replaces, timer</div><div class="">P-Access-Network-Info: GSTN;operator-specific-GI=320615200;network-provided</div><div class="">P-Asserted-Identity: <<a href="sip:+9997@voip-connect.fr;user=phone" class="">sip:+9997@voip-connect.fr;user=phone</a>></div><div class="">Content-Type: application/sdp</div><div class="">Content-Length: 246</div><div class=""><br class=""></div><div class="">v=0</div><div class="">o=root 79038203 79038203 IN IP4 100.64.10.2</div><div class="">s=Asterisk PBX 13.13.1</div><div class="">c=IN IP4 100.64.10.2</div><div class="">t=0 0</div><div class="">m=audio 13564 RTP/AVP 8 101</div><div class="">a=rtpmap:8 PCMA/8000</div><div class="">a=rtpmap:101 telephone-event/8000</div><div class="">a=fmtp:101 0-16</div><div class="">a=ptime:20</div><div class="">a=maxptime:150</div><div class="">a=sendrecv</div><div class=""><br class=""></div><div class="">20:58:46.216642 IP 100.64.10.1.5060 > 100.64.10.2.5060: SIP, length: 375</div><div class="">SIP/2.0 100 trying -- your call is important to us</div><div class="">Via: SIP/2.0/UDP 100.64.10.2:5060;branch=z9hG4bK38ea6539;rport=5060;received=100.64.10.2</div><div class="">From: "FAX" <<a href="sip:+9997@100.64.10.2" class="">sip:+9997@100.64.10.2</a>>;tag=as4cfa9905</div><div class="">To: <<a href="sip:+0598@100.64.10.1;user=phone" class="">sip:+0598@100.64.10.1;user=phone</a>></div><div class="">Call-ID: <a href="mailto:1c9fb2447f3f72732a83aafa6a3e3017@100.64.10.2" class="">1c9fb2447f3f72732a83aafa6a3e3017@100.64.10.2</a>:5060</div><div class="">CSeq: 102 INVITE</div><div class="">Content-Length: 0</div><div class=""><br class=""></div><div class=""><br class=""></div><div class="">20:58:46.222391 IP X.X.X.X.5060 > Y.Y.Y.Y.5060: SIP, length: 1040</div><div class="">INVITE <a href="sip:+0598@Y.Y.Y.Y:5060" class="">sip:+0598@Y.Y.Y.Y:5060</a> SIP/2.0</div><div class="">Via: SIP/2.0/UDP X.X.X.X;branch=z9hG4bK0cec.841e0d4a4e7897fd734b985f81a15580.0</div><div class="">Max-Forwards: 69</div><div class="">From: "FAX" <<a href="sip:+9997@X.X.X.X" class="">sip:+9997@X.X.X.X</a>>;tag=as4cfa9905</div><div class="">To: <<a href="sip:+0598@Y.Y.Y.Y;user=phone" class="">sip:+0598@Y.Y.Y.Y;user=phone</a>></div><div class="">Call-ID: <a href="mailto:1c9fb2447f3f72732a83aafa6a3e3017@100.64.10.2" class="">1c9fb2447f3f72732a83aafa6a3e3017@100.64.10.2</a>:5060</div><div class="">CSeq: 102 INVITE</div><div class="">User-Agent: Asterisk PBX 13.13.1</div><div class="">Date: Thu, 29 Dec 2016 19:59:36 GMT</div><div class="">Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE</div><div class="">Supported: replaces, timer</div><div class="">P-Access-Network-Info: GSTN;operator-specific-GI=320615200;network-provided</div><div class="">P-Asserted-Identity: <<a href="sip:+9997@voip-connect.fr;user=phone" class="">sip:+9997@voip-connect.fr;user=phone</a>></div><div class="">Content-Type: application/sdp</div><div class="">Content-Length: 264</div><div class="">Contact: <<a href="sip:btpsh-58656af1-769f-1@X.X.X.X" class="">sip:btpsh-58656af1-769f-1@X.X.X.X</a>></div><div class=""><br class=""></div><div class="">v=0</div><div class="">o=root 79038203 79038203 IN IP4 X.X.X.X</div><div class="">s=Asterisk PBX 13.13.1</div><div class="">c=IN IP4 X.X.X.X</div><div class="">t=0 0</div><div class="">m=audio 57810 RTP/AVP 8 101</div><div class="">a=rtpmap:8 PCMA/8000</div><div class="">a=rtpmap:101 telephone-event/8000</div><div class="">a=fmtp:101 0-16</div><div class="">a=ptime:20</div><div class="">a=maxptime:150</div><div class="">a=sendrecv</div><div class="">a=nortpproxy:yes</div><div class=""><br class=""></div><div class="">20:58:46.234592 IP Y.Y.Y.Y.5060 > X.X.X.X.5060: SIP, length: 290</div><div class="">SIP/2.0 100 Trying</div><div class="">Via: SIP/2.0/UDP X.X.X.X;branch=z9hG4bK0cec.841e0d4a4e7897fd734b985f81a15580.0</div><div class="">From: "FAX" <<a href="sip:+9997@X.X.X.X" class="">sip:+9997@X.X.X.X</a>>;tag=as4cfa9905</div><div class="">To: <<a href="sip:+0598@Y.Y.Y.Y;user=phone" class="">sip:+0598@Y.Y.Y.Y;user=phone</a>></div><div class="">Call-ID: <a href="mailto:1c9fb2447f3f72732a83aafa6a3e3017@100.64.10.2" class="">1c9fb2447f3f72732a83aafa6a3e3017@100.64.10.2</a>:5060</div><div class="">CSeq: 102 INVITE</div><div class=""><br class=""></div><div class=""><br class=""></div><div class="">20:58:46.548771 IP Y.Y.Y.Y.5060 > X.X.X.X.5060: SIP, length: 718</div><div class="">SIP/2.0 183 Session Progress</div><div class="">Via: SIP/2.0/UDP X.X.X.X;branch=z9hG4bK0cec.841e0d4a4e7897fd734b985f81a15580.0</div><div class="">From: "FAX" <<a href="sip:+9997@X.X.X.X" class="">sip:+9997@X.X.X.X</a>>;tag=as4cfa9905</div><div class="">To: <<a href="sip:+0598@Y.Y.Y.Y;user=phone" class="">sip:+0598@Y.Y.Y.Y;user=phone</a>>;tag=SDc8s1299-016500890000adc2</div><div class="">Call-ID: <a href="mailto:1c9fb2447f3f72732a83aafa6a3e3017@100.64.10.2" class="">1c9fb2447f3f72732a83aafa6a3e3017@100.64.10.2</a>:5060</div><div class="">CSeq: 102 INVITE</div><div class="">Content-Length: 216</div><div class="">Contact: <<a href="sip:+0598@Y.Y.Y.Y:5060;user=phone;transport=udp" class="">sip:+0598@Y.Y.Y.Y:5060;user=phone;transport=udp</a>></div><div class="">Content-Disposition: session;handling=required</div><div class="">Content-Type: application/sdp</div><div class=""><br class=""></div><div class="">v=0</div><div class="">o=- 1510281183 168103904 IN IP4 Y.Y.Y.Z</div><div class="">s=-</div><div class="">c=IN IP4 Y.Y.Y.Z</div><div class="">t=0 0</div><div class="">m=audio 17818 RTP/AVP 8 101</div><div class="">a=sendrecv</div><div class="">a=ptime:20</div><div class="">a=rtpmap:101 telephone-event/8000</div><div class="">a=maxptime:30</div><div class="">a=silenceSupp:off - - - -</div><div class=""><br class=""></div><div class="">20:58:46.554903 IP 100.64.10.1.5060 > 100.64.10.2.5060: SIP, length: 719</div><div class="">SIP/2.0 183 Session Progress</div><div class="">From: "FAX" <<a href="sip:+9997@X.X.X.X" class="">sip:+9997@X.X.X.X</a>>;tag=as4cfa9905</div><div class="">To: <<a href="sip:+0598@Y.Y.Y.Y;user=phone" class="">sip:+0598@Y.Y.Y.Y;user=phone</a>>;tag=SDc8s1299-016500890000adc2</div><div class="">Call-ID: <a href="mailto:1c9fb2447f3f72732a83aafa6a3e3017@100.64.10.2" class="">1c9fb2447f3f72732a83aafa6a3e3017@100.64.10.2</a>:5060</div><div class="">CSeq: 102 INVITE</div><div class="">Content-Length: 232</div><div class="">Content-Disposition: session;handling=required</div><div class="">Content-Type: application/sdp</div><div class="">Via: SIP/2.0/UDP 100.64.10.2:5060;received=100.64.10.2;branch=z9hG4bK38ea6539;rport=5060</div><div class="">Contact: <<a href="sip:atpsh-58656af1-769f-2@100.64.10.1" class="">sip:atpsh-58656af1-769f-2@100.64.10.1</a>></div><div class=""><br class=""></div><div class="">v=0</div><div class="">o=- 1510281183 168103904 IN IP4 100.64.10.1</div><div class="">s=-</div><div class="">c=IN IP4 100.64.10.1</div><div class="">t=0 0</div><div class="">m=audio 62130 RTP/AVP 8 101</div><div class="">a=sendrecv</div><div class="">a=ptime:20</div><div class="">a=rtpmap:101 telephone-event/8000</div><div class="">a=maxptime:30</div><div class="">a=silenceSupp:off - - - -</div><div class="">a=nortpproxy:yes</div><div class=""><br class=""></div><div class="">20:58:47.735919 IP Y.Y.Y.Y.5060 > X.X.X.X.5060: SIP, length: 709</div><div class="">SIP/2.0 180 Ringing</div><div class="">Via: SIP/2.0/UDP X.X.X.X;branch=z9hG4bK0cec.841e0d4a4e7897fd734b985f81a15580.0</div><div class="">From: "FAX" <<a href="sip:+9997@X.X.X.X" class="">sip:+9997@X.X.X.X</a>>;tag=as4cfa9905</div><div class="">To: <<a href="sip:+0598@Y.Y.Y.Y;user=phone" class="">sip:+0598@Y.Y.Y.Y;user=phone</a>>;tag=SDc8s1299-016500890000adc2</div><div class="">Call-ID: <a href="mailto:1c9fb2447f3f72732a83aafa6a3e3017@100.64.10.2" class="">1c9fb2447f3f72732a83aafa6a3e3017@100.64.10.2</a>:5060</div><div class="">CSeq: 102 INVITE</div><div class="">Content-Length: 216</div><div class="">Contact: <<a href="sip:+0598@Y.Y.Y.Y:5060;user=phone;transport=udp" class="">sip:+0598@Y.Y.Y.Y:5060;user=phone;transport=udp</a>></div><div class="">Content-Disposition: session;handling=required</div><div class="">Content-Type: application/sdp</div><div class=""><br class=""></div><div class="">v=0</div><div class="">o=- 1510281183 168103904 IN IP4 Y.Y.Y.Z</div><div class="">s=-</div><div class="">c=IN IP4 Y.Y.Y.Z</div><div class="">t=0 0</div><div class="">m=audio 17818 RTP/AVP 8 101</div><div class="">a=sendrecv</div><div class="">a=ptime:20</div><div class="">a=rtpmap:101 telephone-event/8000</div><div class="">a=maxptime:30</div><div class="">a=silenceSupp:off - - - -</div><div class=""><br class=""></div><div class="">20:58:47.741229 IP 100.64.10.1.5060 > 100.64.10.2.5060: SIP, length: 710</div><div class="">SIP/2.0 180 Ringing</div><div class="">From: "FAX" <<a href="sip:+9997@X.X.X.X" class="">sip:+9997@X.X.X.X</a>>;tag=as4cfa9905</div><div class="">To: <<a href="sip:+0598@Y.Y.Y.Y;user=phone" class="">sip:+0598@Y.Y.Y.Y;user=phone</a>>;tag=SDc8s1299-016500890000adc2</div><div class="">Call-ID: <a href="mailto:1c9fb2447f3f72732a83aafa6a3e3017@100.64.10.2" class="">1c9fb2447f3f72732a83aafa6a3e3017@100.64.10.2</a>:5060</div><div class="">CSeq: 102 INVITE</div><div class="">Content-Length: 232</div><div class="">Content-Disposition: session;handling=required</div><div class="">Content-Type: application/sdp</div><div class="">Via: SIP/2.0/UDP 100.64.10.2:5060;received=100.64.10.2;branch=z9hG4bK38ea6539;rport=5060</div><div class="">Contact: <<a href="sip:atpsh-58656af1-769f-2@100.64.10.1" class="">sip:atpsh-58656af1-769f-2@100.64.10.1</a>></div><div class=""><br class=""></div><div class="">v=0</div><div class="">o=- 1510281183 168103904 IN IP4 100.64.10.1</div><div class="">s=-</div><div class="">c=IN IP4 100.64.10.1</div><div class="">t=0 0</div><div class="">m=audio 62130 RTP/AVP 8 101</div><div class="">a=sendrecv</div><div class="">a=ptime:20</div><div class="">a=rtpmap:101 telephone-event/8000</div><div class="">a=maxptime:30</div><div class="">a=silenceSupp:off - - - -</div><div class="">a=nortpproxy:yes</div><div class=""><br class=""></div><div class="">20:58:48.050762 IP Y.Y.Y.Y.5060 > X.X.X.X.5060: SIP, length: 709</div><div class="">SIP/2.0 180 Ringing</div><div class="">Via: SIP/2.0/UDP X.X.X.X;branch=z9hG4bK0cec.841e0d4a4e7897fd734b985f81a15580.0</div><div class="">From: "FAX" <<a href="sip:+9997@X.X.X.X" class="">sip:+9997@X.X.X.X</a>>;tag=as4cfa9905</div><div class="">To: <<a href="sip:+0598@Y.Y.Y.Y;user=phone" class="">sip:+0598@Y.Y.Y.Y;user=phone</a>>;tag=SDc8s1299-016500890000adc2</div><div class="">Call-ID: <a href="mailto:1c9fb2447f3f72732a83aafa6a3e3017@100.64.10.2" class="">1c9fb2447f3f72732a83aafa6a3e3017@100.64.10.2</a>:5060</div><div class="">CSeq: 102 INVITE</div><div class="">Content-Length: 216</div><div class="">Contact: <<a href="sip:+0598@Y.Y.Y.Y:5060;user=phone;transport=udp" class="">sip:+0598@Y.Y.Y.Y:5060;user=phone;transport=udp</a>></div><div class="">Content-Disposition: session;handling=required</div><div class="">Content-Type: application/sdp</div><div class=""><br class=""></div><div class="">v=0</div><div class="">o=- 1510281183 168103904 IN IP4 Y.Y.Y.Z</div><div class="">s=-</div><div class="">c=IN IP4 Y.Y.Y.Z</div><div class="">t=0 0</div><div class="">m=audio 17818 RTP/AVP 8 101</div><div class="">a=sendrecv</div><div class="">a=ptime:20</div><div class="">a=rtpmap:101 telephone-event/8000</div><div class="">a=maxptime:30</div><div class="">a=silenceSupp:off - - - -</div><div class=""><br class=""></div><div class="">20:58:48.056175 IP 100.64.10.1.5060 > 100.64.10.2.5060: SIP, length: 710</div><div class="">SIP/2.0 180 Ringing</div><div class="">From: "FAX" <<a href="sip:+9997@X.X.X.X" class="">sip:+9997@X.X.X.X</a>>;tag=as4cfa9905</div><div class="">To: <<a href="sip:+0598@Y.Y.Y.Y;user=phone" class="">sip:+0598@Y.Y.Y.Y;user=phone</a>>;tag=SDc8s1299-016500890000adc2</div><div class="">Call-ID: <a href="mailto:1c9fb2447f3f72732a83aafa6a3e3017@100.64.10.2" class="">1c9fb2447f3f72732a83aafa6a3e3017@100.64.10.2</a>:5060</div><div class="">CSeq: 102 INVITE</div><div class="">Content-Length: 232</div><div class="">Content-Disposition: session;handling=required</div><div class="">Content-Type: application/sdp</div><div class="">Via: SIP/2.0/UDP 100.64.10.2:5060;received=100.64.10.2;branch=z9hG4bK38ea6539;rport=5060</div><div class="">Contact: <<a href="sip:atpsh-58656af1-769f-2@100.64.10.1" class="">sip:atpsh-58656af1-769f-2@100.64.10.1</a>></div><div class=""><br class=""></div><div class="">v=0</div><div class="">o=- 1510281183 168103904 IN IP4 100.64.10.1</div><div class="">s=-</div><div class="">c=IN IP4 100.64.10.1</div><div class="">t=0 0</div><div class="">m=audio 62130 RTP/AVP 8 101</div><div class="">a=sendrecv</div><div class="">a=ptime:20</div><div class="">a=rtpmap:101 telephone-event/8000</div><div class="">a=maxptime:30</div><div class="">a=silenceSupp:off - - - -</div><div class="">a=nortpproxy:yes</div><div class=""><br class=""></div><div class="">20:58:52.811066 IP Y.Y.Y.Y.5060 > X.X.X.X.5060: SIP, length: 774</div><div class="">SIP/2.0 200 OK</div><div class="">Via: SIP/2.0/UDP X.X.X.X;branch=z9hG4bK0cec.841e0d4a4e7897fd734b985f81a15580.0</div><div class="">From: "FAX" <<a href="sip:+9997@X.X.X.X" class="">sip:+9997@X.X.X.X</a>>;tag=as4cfa9905</div><div class="">To: <<a href="sip:+0598@Y.Y.Y.Y;user=phone" class="">sip:+0598@Y.Y.Y.Y;user=phone</a>>;tag=SDc8s1299-016500890000adc2</div><div class="">Call-ID: <a href="mailto:1c9fb2447f3f72732a83aafa6a3e3017@100.64.10.2" class="">1c9fb2447f3f72732a83aafa6a3e3017@100.64.10.2</a>:5060</div><div class="">CSeq: 102 INVITE</div><div class="">Content-Length: 216</div><div class="">Allow: INVITE,ACK,BYE,CANCEL,OPTIONS,INFO</div><div class="">Contact: <<a href="sip:+0598@Y.Y.Y.Y:5060;user=phone;transport=udp" class="">sip:+0598@Y.Y.Y.Y:5060;user=phone;transport=udp</a>></div><div class="">Accept-Encoding: identity</div><div class="">Content-Disposition: session;handling=required</div><div class="">Content-Type: application/sdp</div><div class=""><br class=""></div><div class="">v=0</div><div class="">o=- 1510281183 168103904 IN IP4 Y.Y.Y.Z</div><div class="">s=-</div><div class="">c=IN IP4 Y.Y.Y.Z</div><div class="">t=0 0</div><div class="">m=audio 17818 RTP/AVP 8 101</div><div class="">a=sendrecv</div><div class="">a=ptime:20</div><div class="">a=rtpmap:101 telephone-event/8000</div><div class="">a=maxptime:30</div><div class="">a=silenceSupp:off - - - -</div><div class=""><br class=""></div><div class="">20:58:52.818381 IP 100.64.10.1.5060 > 100.64.10.2.5060: SIP, length: 775</div><div class="">SIP/2.0 200 OK</div><div class="">From: "FAX" <<a href="sip:+9997@X.X.X.X" class="">sip:+9997@X.X.X.X</a>>;tag=as4cfa9905</div><div class="">To: <<a href="sip:+0598@Y.Y.Y.Y;user=phone" class="">sip:+0598@Y.Y.Y.Y;user=phone</a>>;tag=SDc8s1299-016500890000adc2</div><div class="">Call-ID: <a href="mailto:1c9fb2447f3f72732a83aafa6a3e3017@100.64.10.2" class="">1c9fb2447f3f72732a83aafa6a3e3017@100.64.10.2</a>:5060</div><div class="">CSeq: 102 INVITE</div><div class="">Content-Length: 232</div><div class="">Allow: INVITE,ACK,BYE,CANCEL,OPTIONS,INFO</div><div class="">Accept-Encoding: identity</div><div class="">Content-Disposition: session;handling=required</div><div class="">Content-Type: application/sdp</div><div class="">Via: SIP/2.0/UDP 100.64.10.2:5060;received=100.64.10.2;branch=z9hG4bK38ea6539;rport=5060</div><div class="">Contact: <<a href="sip:atpsh-58656af1-769f-2@100.64.10.1" class="">sip:atpsh-58656af1-769f-2@100.64.10.1</a>></div><div class=""><br class=""></div><div class="">v=0</div><div class="">o=- 1510281183 168103904 IN IP4 100.64.10.1</div><div class="">s=-</div><div class="">c=IN IP4 100.64.10.1</div><div class="">t=0 0</div><div class="">m=audio 62130 RTP/AVP 8 101</div><div class="">a=sendrecv</div><div class="">a=ptime:20</div><div class="">a=rtpmap:101 telephone-event/8000</div><div class="">a=maxptime:30</div><div class="">a=silenceSupp:off - - - -</div><div class="">a=nortpproxy:yes</div><div class=""><br class=""></div><div class="">20:58:52.819315 IP 100.64.10.2.5060 > 100.64.10.1.5060: SIP, length: 446</div><div class="">ACK <a href="sip:atpsh-58656af1-769f-2@100.64.10.1" class="">sip:atpsh-58656af1-769f-2@100.64.10.1</a> SIP/2.0</div><div class="">Via: SIP/2.0/UDP 100.64.10.2:5060;branch=z9hG4bK18c31028;rport</div><div class="">Max-Forwards: 70</div><div class="">From: "FAX" <<a href="sip:+9997@100.64.10.2" class="">sip:+9997@100.64.10.2</a>>;tag=as4cfa9905</div><div class="">To: <<a href="sip:+0598@100.64.10.1;user=phone" class="">sip:+0598@100.64.10.1;user=phone</a>>;tag=SDc8s1299-016500890000adc2</div><div class="">Contact: <<a href="sip:+9997@100.64.10.2:5060" class="">sip:+9997@100.64.10.2:5060</a>></div><div class="">Call-ID: <a href="mailto:1c9fb2447f3f72732a83aafa6a3e3017@100.64.10.2" class="">1c9fb2447f3f72732a83aafa6a3e3017@100.64.10.2</a>:5060</div><div class="">CSeq: 102 ACK</div><div class="">User-Agent: Asterisk PBX 13.13.1</div><div class="">Content-Length: 0</div><div class=""><br class=""></div><div class=""><br class=""></div><div class="">20:58:52.825894 IP X.X.X.X.5060 > Y.Y.Y.Y.5060: SIP, length: 491</div><div class="">ACK <a href="sip:+0598@Y.Y.Y.Y:5060;user=phone;transport=udp" class="">sip:+0598@Y.Y.Y.Y:5060;user=phone;transport=udp</a> SIP/2.0</div><div class="">Via: SIP/2.0/UDP X.X.X.X;branch=z9hG4bK0cec.d149220aa711a5230da51bfea457d8bc.0</div><div class="">Max-Forwards: 69</div><div class="">From: "FAX" <<a href="sip:+9997@100.64.10.2" class="">sip:+9997@100.64.10.2</a>>;tag=as4cfa9905</div><div class="">To: <<a href="sip:+0598@100.64.10.1;user=phone" class="">sip:+0598@100.64.10.1;user=phone</a>>;tag=SDc8s1299-016500890000adc2</div><div class="">Call-ID: <a href="mailto:1c9fb2447f3f72732a83aafa6a3e3017@100.64.10.2" class="">1c9fb2447f3f72732a83aafa6a3e3017@100.64.10.2</a>:5060</div><div class="">CSeq: 102 ACK</div><div class="">User-Agent: Asterisk PBX 13.13.1</div><div class="">Content-Length: 0</div><div class="">Contact: <<a href="sip:btpsh-58656af1-769f-1@X.X.X.X" class="">sip:btpsh-58656af1-769f-1@X.X.X.X</a>></div><div class=""><br class=""></div><div class=""><br class=""></div><div class="">20:59:00.388481 IP Y.Y.Y.Y.5060 > X.X.X.X.5060: SIP, length: 910</div><div class="">INVITE <a href="sip:btpsh-58656af1-769f-1@X.X.X.X" class="">sip:btpsh-58656af1-769f-1@X.X.X.X</a> SIP/2.0</div><div class="">Via: SIP/2.0/UDP Y.Y.Y.Y:5060;branch=z9hG4bKm3trae309oacrlkm13h0sb0000g00.1</div><div class="">To: "FAX" <<a href="sip:+9997@X.X.X.X" class="">sip:+9997@X.X.X.X</a>>;tag=as4cfa9905</div><div class="">From: <<a href="sip:+0598@Y.Y.Y.Y;user=phone" class="">sip:+0598@Y.Y.Y.Y;user=phone</a>>;tag=SDc8s1299-016500890000adc2</div><div class="">Call-ID: <a href="mailto:1c9fb2447f3f72732a83aafa6a3e3017@100.64.10.2" class="">1c9fb2447f3f72732a83aafa6a3e3017@100.64.10.2</a>:5060</div><div class="">CSeq: 1 INVITE</div><div class="">Content-Length: 273</div><div class="">Max-Forwards: 69</div><div class="">Allow: INVITE,ACK,BYE,CANCEL,OPTIONS,INFO</div><div class="">Contact: <<a href="sip:+0598@Y.Y.Y.Y:5060;user=phone;transport=udp" class="">sip:+0598@Y.Y.Y.Y:5060;user=phone;transport=udp</a>></div><div class="">Accept-Encoding: identity</div><div class="">Content-Disposition: session;handling=required</div><div class="">Content-Type: application/sdp</div><div class=""><br class=""></div><div class="">v=0</div><div class="">o=- 1510281183 168103905 IN IP4 Y.Y.Y.Z</div><div class="">s=-</div><div class="">c=IN IP4 Y.Y.Y.Z</div><div class="">t=0 0</div><div class="">m=image 17818 udptl t38</div><div class="">a=T38FaxVersion:0</div><div class="">a=T38MaxBitRate:14400</div><div class="">a=T38FaxRateManagement:transferredTCF</div><div class="">a=T38FaxMaxBuffer:1800</div><div class="">a=T38FaxMaxDatagram:260</div><div class="">a=T38FaxUdpEC:t38UDPRedundancy</div><div class=""><br class=""></div><div class="">20:59:00.390679 IP X.X.X.X.5060 > Y.Y.Y.Y.5060: SIP, length: 420</div><div class="">SIP/2.0 100 trying -- your call is important to us</div><div class="">Via: SIP/2.0/UDP Y.Y.Y.Y:5060;branch=z9hG4bKm3trae309oacrlkm13h0sb0000g00.1;rport=5060</div><div class="">To: "FAX" <<a href="sip:+9997@X.X.X.X" class="">sip:+9997@X.X.X.X</a>>;tag=as4cfa9905</div><div class="">From: <<a href="sip:+0598@Y.Y.Y.Y;user=phone" class="">sip:+0598@Y.Y.Y.Y;user=phone</a>>;tag=SDc8s1299-016500890000adc2</div><div class="">Call-ID: <a href="mailto:1c9fb2447f3f72732a83aafa6a3e3017@100.64.10.2" class="">1c9fb2447f3f72732a83aafa6a3e3017@100.64.10.2</a>:5060</div><div class="">CSeq: 1 INVITE</div><div class="">Content-Length: 0</div><div class=""><br class=""></div><div class=""><br class=""></div><div class="">20:59:00.395723 IP 100.64.10.1.5060 > 100.64.10.2.5060: SIP, length: 890</div><div class="">INVITE <a href="sip:+9997@100.64.10.2:5060" class="">sip:+9997@100.64.10.2:5060</a> SIP/2.0</div><div class="">Via: SIP/2.0/UDP 100.64.10.1;branch=z9hG4bK720b.88d9cf77da5d6f5fa4aac2c5623d8ac4.0</div><div class="">To: "FAX" <<a href="sip:+9997@X.X.X.X" class="">sip:+9997@X.X.X.X</a>>;tag=as4cfa9905</div><div class="">From: <<a href="sip:+0598@Y.Y.Y.Y;user=phone" class="">sip:+0598@Y.Y.Y.Y;user=phone</a>>;tag=SDc8s1299-016500890000adc2</div><div class="">Call-ID: <a href="mailto:1c9fb2447f3f72732a83aafa6a3e3017@100.64.10.2" class="">1c9fb2447f3f72732a83aafa6a3e3017@100.64.10.2</a>:5060</div><div class="">CSeq: 1 INVITE</div><div class="">Content-Length: 289</div><div class="">Max-Forwards: 68</div><div class="">Allow: INVITE,ACK,BYE,CANCEL,OPTIONS,INFO</div><div class="">Accept-Encoding: identity</div><div class="">Content-Disposition: session;handling=required</div><div class="">Content-Type: application/sdp</div><div class="">Contact: <<a href="sip:btpsh-58656af1-769f-1@X.X.X.X" class="">sip:btpsh-58656af1-769f-1@X.X.X.X</a>></div><div class=""><br class=""></div><div class="">v=0</div><div class="">o=- 1510281183 168103905 IN IP4 100.64.10.1</div><div class="">s=-</div><div class="">c=IN IP4 100.64.10.1</div><div class="">t=0 0</div><div class="">m=image 62130 udptl t38</div><div class="">a=T38FaxVersion:0</div><div class="">a=T38MaxBitRate:14400</div><div class="">a=T38FaxRateManagement:transferredTCF</div><div class="">a=T38FaxMaxBuffer:1800</div><div class="">a=T38FaxMaxDatagram:260</div><div class="">a=T38FaxUdpEC:t38UDPRedundancy</div><div class="">a=nortpproxy:yes</div><div class=""><br class=""></div><div class="">20:59:00.397160 IP 100.64.10.2.5060 > 100.64.10.1.5060: SIP, length: 580</div><div class="">SIP/2.0 100 Trying</div><div class="">Via: SIP/2.0/UDP 100.64.10.1;branch=z9hG4bK720b.88d9cf77da5d6f5fa4aac2c5623d8ac4.0;received=100.64.10.1;rport=5060</div><div class="">From: <<a href="sip:+0598@Y.Y.Y.Y;user=phone" class="">sip:+0598@Y.Y.Y.Y;user=phone</a>>;tag=SDc8s1299-016500890000adc2</div><div class="">To: "FAX" <<a href="sip:+9997@X.X.X.X" class="">sip:+9997@X.X.X.X</a>>;tag=as4cfa9905</div><div class="">Call-ID: <a href="mailto:1c9fb2447f3f72732a83aafa6a3e3017@100.64.10.2" class="">1c9fb2447f3f72732a83aafa6a3e3017@100.64.10.2</a>:5060</div><div class="">CSeq: 1 INVITE</div><div class="">Server: Asterisk PBX 13.13.1</div><div class="">Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE</div><div class="">Supported: replaces, timer</div><div class="">Contact: <<a href="sip:+9997@100.64.10.2:5060" class="">sip:+9997@100.64.10.2:5060</a>></div><div class="">Content-Length: 0</div><div class=""><br class=""></div><div class=""><br class=""></div><div class="">20:59:00.397344 IP 100.64.10.2.5060 > 100.64.10.1.5060: SIP, length: 875</div><div class="">SIP/2.0 200 OK</div><div class="">Via: SIP/2.0/UDP 100.64.10.1;branch=z9hG4bK720b.88d9cf77da5d6f5fa4aac2c5623d8ac4.0;received=100.64.10.1;rport=5060</div><div class="">From: <<a href="sip:+0598@Y.Y.Y.Y;user=phone" class="">sip:+0598@Y.Y.Y.Y;user=phone</a>>;tag=SDc8s1299-016500890000adc2</div><div class="">To: "FAX" <<a href="sip:+9997@X.X.X.X" class="">sip:+9997@X.X.X.X</a>>;tag=as4cfa9905</div><div class="">Call-ID: <a href="mailto:1c9fb2447f3f72732a83aafa6a3e3017@100.64.10.2" class="">1c9fb2447f3f72732a83aafa6a3e3017@100.64.10.2</a>:5060</div><div class="">CSeq: 1 INVITE</div><div class="">Server: Asterisk PBX 13.13.1</div><div class="">Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE</div><div class="">Supported: replaces, timer</div><div class="">Contact: <<a href="sip:+9997@100.64.10.2:5060" class="">sip:+9997@100.64.10.2:5060</a>></div><div class="">Content-Type: application/sdp</div><div class="">Content-Length: 266</div><div class=""><br class=""></div><div class="">v=0</div><div class="">o=root 79038203 79038204 IN IP4 100.64.10.2</div><div class="">s=Asterisk PBX 13.13.1</div><div class="">c=IN IP4 100.64.10.2</div><div class="">t=0 0</div><div class="">m=image 4882 udptl t38</div><div class="">a=T38FaxVersion:0</div><div class="">a=T38MaxBitRate:14400</div><div class="">a=T38FaxRateManagement:transferredTCF</div><div class="">a=T38FaxMaxDatagram:1400</div><div class="">a=T38FaxUdpEC:t38UDPRedundancy</div><div class=""><br class=""></div><div class="">20:59:00.405004 IP X.X.X.X.5060 > Y.Y.Y.Y.5060: SIP, length: 874</div><div class="">SIP/2.0 200 OK</div><div class="">From: <<a href="sip:+0598@Y.Y.Y.Y;user=phone" class="">sip:+0598@Y.Y.Y.Y;user=phone</a>>;tag=SDc8s1299-016500890000adc2</div><div class="">To: "FAX" <<a href="sip:+9997@X.X.X.X" class="">sip:+9997@X.X.X.X</a>>;tag=as4cfa9905</div><div class="">Call-ID: <a href="mailto:1c9fb2447f3f72732a83aafa6a3e3017@100.64.10.2" class="">1c9fb2447f3f72732a83aafa6a3e3017@100.64.10.2</a>:5060</div><div class="">CSeq: 1 INVITE</div><div class="">Server: Asterisk PBX 13.13.1</div><div class="">Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE</div><div class="">Supported: replaces, timer</div><div class="">Content-Type: application/sdp</div><div class="">Content-Length: 285</div><div class="">Via: SIP/2.0/UDP Y.Y.Y.Y:5060;rport=5060;branch=z9hG4bKm3trae309oacrlkm13h0sb0000g00.1</div><div class="">Contact: <<a href="sip:atpsh-58656af1-769f-2@100.64.10.1" class="">sip:atpsh-58656af1-769f-2@100.64.10.1</a>></div><div class=""><br class=""></div><div class="">v=0</div><div class="">o=root 79038203 79038204 IN IP4 X.X.X.X</div><div class="">s=Asterisk PBX 13.13.1</div><div class="">c=IN IP4 X.X.X.X</div><div class="">t=0 0</div><div class="">m=image 57810 udptl t38</div><div class="">a=T38FaxVersion:0</div><div class="">a=T38MaxBitRate:14400</div><div class="">a=T38FaxRateManagement:transferredTCF</div><div class="">a=T38FaxMaxDatagram:1400</div><div class="">a=T38FaxUdpEC:t38UDPRedundancy</div><div class="">a=nortpproxy:yes</div><div class=""><br class=""></div><div class="">20:59:00.896864 IP 100.64.10.2.5060 > 100.64.10.1.5060: SIP, length: 875</div><div class="">SIP/2.0 200 OK</div><div class="">Via: SIP/2.0/UDP 100.64.10.1;branch=z9hG4bK720b.88d9cf77da5d6f5fa4aac2c5623d8ac4.0;received=100.64.10.1;rport=5060</div><div class="">From: <<a href="sip:+0598@Y.Y.Y.Y;user=phone" class="">sip:+0598@Y.Y.Y.Y;user=phone</a>>;tag=SDc8s1299-016500890000adc2</div><div class="">To: "FAX" <<a href="sip:+9997@X.X.X.X" class="">sip:+9997@X.X.X.X</a>>;tag=as4cfa9905</div><div class="">Call-ID: <a href="mailto:1c9fb2447f3f72732a83aafa6a3e3017@100.64.10.2" class="">1c9fb2447f3f72732a83aafa6a3e3017@100.64.10.2</a>:5060</div><div class="">CSeq: 1 INVITE</div><div class="">Server: Asterisk PBX 13.13.1</div><div class="">Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE</div><div class="">Supported: replaces, timer</div><div class="">Contact: <<a href="sip:+9997@100.64.10.2:5060" class="">sip:+9997@100.64.10.2:5060</a>></div><div class="">Content-Type: application/sdp</div><div class="">Content-Length: 266</div><div class=""><br class=""></div><div class="">v=0</div><div class="">o=root 79038203 79038204 IN IP4 100.64.10.2</div><div class="">s=Asterisk PBX 13.13.1</div><div class="">c=IN IP4 100.64.10.2</div><div class="">t=0 0</div><div class="">m=image 4882 udptl t38</div><div class="">a=T38FaxVersion:0</div><div class="">a=T38MaxBitRate:14400</div><div class="">a=T38FaxRateManagement:transferredTCF</div><div class="">a=T38FaxMaxDatagram:1400</div><div class="">a=T38FaxUdpEC:t38UDPRedundancy</div><div class=""><br class=""></div><div class="">20:59:00.904049 IP X.X.X.X.5060 > Y.Y.Y.Y.5060: SIP, length: 874</div><div class="">TSIP/2.0 200 OK</div><div class="">From: <<a href="sip:+0598@Y.Y.Y.Y;user=phone" class="">sip:+0598@Y.Y.Y.Y;user=phone</a>>;tag=SDc8s1299-016500890000adc2</div><div class="">To: "FAX" <<a href="sip:+9997@X.X.X.X" class="">sip:+9997@X.X.X.X</a>>;tag=as4cfa9905</div><div class="">Call-ID: <a href="mailto:1c9fb2447f3f72732a83aafa6a3e3017@100.64.10.2" class="">1c9fb2447f3f72732a83aafa6a3e3017@100.64.10.2</a>:5060</div><div class="">CSeq: 1 INVITE</div><div class="">Server: Asterisk PBX 13.13.1</div><div class="">Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE</div><div class="">Supported: replaces, timer</div><div class="">Content-Type: application/sdp</div><div class="">Content-Length: 285</div><div class="">Via: SIP/2.0/UDP Y.Y.Y.Y:5060;rport=5060;branch=z9hG4bKm3trae309oacrlkm13h0sb0000g00.1</div><div class="">Contact: <<a href="sip:atpsh-58656af1-769f-2@100.64.10.1" class="">sip:atpsh-58656af1-769f-2@100.64.10.1</a>></div><div class=""><br class=""></div><div class="">v=0</div><div class="">o=root 79038203 79038204 IN IP4 X.X.X.X</div><div class="">s=Asterisk PBX 13.13.1</div><div class="">c=IN IP4 X.X.X.X</div><div class="">t=0 0</div><div class="">m=image 57810 udptl t38</div><div class="">a=T38FaxVersion:0</div><div class="">a=T38MaxBitRate:14400</div><div class="">a=T38FaxRateManagement:transferredTCF</div><div class="">a=T38FaxMaxDatagram:1400</div><div class="">a=T38FaxUdpEC:t38UDPRedundancy</div><div class="">a=nortpproxy:yes</div><div class=""><br class=""></div><div class=""><br class=""></div><div class="">And so on until timeout and BYE</div><div class=""><br class=""></div></div><div class=""><br class=""></div></body></html>