Hi,<br><br>I'm no expert but I think that the default opensips scripts handles the downscript ACK with this code:<br>route(1) simple relays the message.<br><br> if (has_totag()) {<br> # sequential request withing a dialog should<br>
# take the path determined by record-routing<br> if (loose_route()) {<br> if (is_method("BYE")) {<br> setflag(1); # do accounting ...<br>
setflag(3); # ... even if the transaction fails<br> }<br> route(1);<br> } else {<br> /* uncomment the following lines if you want to enable presence */<br>
##if (is_method("SUBSCRIBE") && $rd == "your.server.ip.address") {<br> ## # in-dialog subscribe requests<br> ## route(2);<br>
## exit;<br> ##}<br> if ( is_method("ACK") ) {<br> if ( t_check_trans() ) {<br> # non loose-route, but stateful ACK; must be an ACK after a 487 or e.g. 404 from upstream server<br>
t_relay();<br> exit;<br> } else {<br> # ACK without matching transaction ... ignore and discard.\n");<br>
exit;<br> }<br> }<br> sl_send_reply("404","Not here");<br> }<br> exit;<br>
}<br><br>Hope it helps,<br><br>Regards,<br><br><br><div class="gmail_quote">2010/1/21 Oleg Burlacu <span dir="ltr"><<a href="mailto:olegburlacu@gmail.com">olegburlacu@gmail.com</a>></span><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<br>
<div class="gmail_quote"><br>Hi,
<div>I'm running a statefull proxy that in most cases need to relay the calls to a PSTN gateway.</div>
<div>After the migration to the Opensips 1.6.1, there is a problem with compatibility / RR module and the gateway (Cisco AS5300).</div>
<div>Opensips does not relay 'correctly' (in my case) the ACK messages. The Cisco gateway do not receive ACKs and hangup the call after a timeout.</div>
<div>The configuration script is developed on the sipwise template, but it works perfectly in 1.4 version of Opensips.</div>
<div><br></div>
<div>When debugging I see each time more and more headers in ACK packets</div>
<div>
<div>
<div>Record-Route: <sip:xx.yy.56.226;lr=on;ftag=4a734ab13a9></div>
<div>Record-Route: <sip:xx.yy.56.226;lr=on;ftag=4a734ab13a9></div>
<div>Record-Route: <sip:xx.yy.56.226;lr=on;ftag=4a734ab13a9></div>
<div>Record-Route: <sip:xx.yy.56.226;lr=on;ftag=4a734ab13a9></div>
<div>Via: SIP/2.0/UDP xx.yy.56.226;branch=z9hG4bKa636.94cf333.2</div>
<div>Via: SIP/2.0/UDP xx.yy.56.226;branch=z9hG4bKa636.94cf333.2</div>
<div>Via: SIP/2.0/UDP xx.yy.56.226;branch=z9hG4bKa636.94cf333.2</div>
<div>Via: SIP/2.0/UDP xx.yy.56.226;branch=z9hG4bKa636.94cf333.2</div>
<div>Via: SIP/2.0/UDP xx.yy.17.20;branch=z9hG4bK591c1114000023e34b43aea600004e6700001405</div>
<div><br></div>
<div>When disabling the record_route(), and messages go from sip client directly to the gateway - all in ok.</div>
<div>When communicating between 2 sip clients on the same proxy - the messages are relayed correctly.</div>
<div>What can be the solution?</div>
<div><br></div>
<div><br></div>
<div>The entire message log:</div>
<div><br></div>
<div>
<div>U xx.yy.17.20:5060 -> xx.yy.56.226:5060</div>
<div>INVITE sip:987654@xx.yy.56.226 SIP/2.0.</div>
<div>Via: SIP/2.0/UDP xx.yy.17.20;branch=z9hG4bK591c1114000026464b446164000023ea000016ed.</div>
<div>From: "unknown" <sip:123456@xx.yy.56.226>;tag=152937654c2b.</div>
<div>To: <sip:987654@xx.yy.56.226>.</div>
<div>Contact: <sip:123456@xx.yy.17.20>.</div>
<div>Call-ID: D17BF0696DC546A7B436401CD27774720x591c1114.</div>
<div>CSeq: 1 INVITE.</div>
<div>Max-Forwards: 70.</div>
<div>User-Agent: SJphone/1.65.377a (SJ Labs).</div>
<div><br></div>
<div><br></div>
<div>U xx.yy.56.226:5060 -> xx.yy.17.20:5060</div>
<div>SIP/2.0 100 Trying.</div>
<div>Via: SIP/2.0/UDP xx.yy.17.20;branch=z9hG4bK591c1114000026464b446164000023ea000016ed.</div>
<div>From: "unknown" <sip:123456@xx.yy.56.226>;tag=152937654c2b.</div>
<div>To: <sip:987654@xx.yy.56.226>.</div>
<div>Call-ID: D17BF0696DC546A7B436401CD27774720x591c1114.</div>
<div>CSeq: 1 INVITE.</div>
<div> </div>
<div><br></div>
<div><br></div>
<div>U xx.yy.56.226:5060 -> xx.yy.17.20:5060</div>
<div>SIP/2.0 407 Proxy Authentication Required.</div>
<div>Via: SIP/2.0/UDP xx.yy.17.20;branch=z9hG4bK591c1114000026464b446164000023ea000016ed.</div>
<div>From: "unknown" <sip:123456@xx.yy.56.226>;tag=152937654c2b.</div>
<div>To: <sip:987654@xx.yy.56.226>;tag=c97b4d1cb1f3d0da549e06a8d482ef63.8548.</div>
<div>Call-ID: D17BF0696DC546A7B436401CD27774720x591c1114.</div>
<div>CSeq: 1 INVITE.</div>
<div> </div>
<div><br></div>
<div><br></div>
<div>U xx.yy.17.20:5060 -> xx.yy.56.226:5060</div>
<div>ACK sip:987654@xx.yy.56.226 SIP/2.0.</div>
<div>Via: SIP/2.0/UDP xx.yy.17.20;branch=z9hG4bK591c1114000026464b446164000023ea000016ed.</div>
<div>From: "unknown" <sip:123456@xx.yy.56.226>;tag=152937654c2b.</div>
<div>To: <sip:987654@xx.yy.56.226>;tag=c97b4d1cb1f3d0da549e06a8d482ef63.8548.</div>
<div>Call-ID: D17BF0696DC546A7B436401CD27774720x591c1114.</div>
<div>CSeq: 1 ACK.</div>
<div>Max-Forwards: 70.</div>
<div>User-Agent: SJphone/1.65.377a (SJ Labs).</div>
<div>Content-Length: 0.</div>
<div><br></div>
<div><br></div>
<div><br></div>
<div>U xx.yy.17.20:5060 -> xx.yy.56.226:5060</div>
<div>INVITE sip:987654@xx.yy.56.226 SIP/2.0.</div>
<div>Via: SIP/2.0/UDP xx.yy.17.20;branch=z9hG4bK591c1114000026474b44616400001647000016f0.</div>
<div>From: "unknown" <sip:123456@xx.yy.56.226>;tag=152937654c2b.</div>
<div>To: <sip:987654@xx.yy.56.226>.</div>
<div>Contact: <sip:123456@xx.yy.17.20>.</div>
<div>Call-ID: D17BF0696DC546A7B436401CD27774720x591c1114.</div>
<div>CSeq: 2 INVITE.</div>
<div>Max-Forwards: 70.</div>
<div>User-Agent: SJphone/1.65.377a (SJ Labs).</div>
<div>Content-Length: 362.</div>
<div>Content-Type: application/sdp.</div>
<div>Supported: replaces,norefersub,timer.</div>
<div>Proxy-Authorization: Digest username="123456",realm="xx.yy.56.226",nonce="4b43ec220000000883661dbea2617b91d28401983dd85b7d",uri="sip:987654@xx.yy.56.226",response="91a62cf62af7870c1e24d6c35857e78d".</div>
<div><br></div>
<div><br></div>
<div><br></div>
<div>U xx.yy.56.226:5060 -> xx.yy.17.20:5060</div>
<div>SIP/2.0 100 Trying.</div>
<div>Via: SIP/2.0/UDP xx.yy.17.20;branch=z9hG4bK591c1114000026474b44616400001647000016f0.</div>
<div>From: "unknown" <sip:123456@xx.yy.56.226>;tag=152937654c2b.</div>
<div>To: <sip:987654@xx.yy.56.226>.</div>
<div>Call-ID: D17BF0696DC546A7B436401CD27774720x591c1114.</div>
<div>CSeq: 2 INVITE.</div>
<div>Server: OpenSIPS (1.6.1-notls (x86_64/linux)).</div>
<div>Content-Length: 0.</div>
<div><br></div>
<div><br></div>
<div>U xx.yy.56.226:5060 -> xx.yy.17.20:5060</div>
<div>SIP/2.0 100 Giving a try.</div>
<div>Via: SIP/2.0/UDP xx.yy.17.20;branch=z9hG4bK591c1114000026474b44616400001647000016f0.</div>
<div>From: "unknown" <sip:123456@xx.yy.56.226>;tag=152937654c2b.</div>
<div>To: <sip:987654@xx.yy.56.226>.</div>
<div>Call-ID: D17BF0696DC546A7B436401CD27774720x591c1114.</div>
<div>CSeq: 2 INVITE.</div>
<div> </div>
<div><br></div>
<div>U xx.yy.56.226:5060 -> xx.yy.25.114:5060</div>
<div>INVITE sip:987654@xx.yy.25.114:5060;transport=udp SIP/2.0.</div>
<div>Record-Route: <sip:xx.yy.56.226;lr=on;ftag=152937654c2b;did=b39.e643f344>.</div>
<div>Via: SIP/2.0/UDP xx.yy.56.226;branch=z9hG4bKf69b.0ced9bb7.0.</div>
<div>Via: SIP/2.0/UDP xx.yy.17.20;branch=z9hG4bK591c1114000026474b44616400001647000016f0.</div>
<div>From: "unknown" <sip:123456@xx.yy.56.226>;tag=152937654c2b.</div>
<div>To: <sip:987654@xx.yy.56.226>.</div>
<div>Contact: <sip:123456@xx.yy.17.20>.</div>
<div>Call-ID: D17BF0696DC546A7B436401CD27774720x591c1114.</div>
<div>CSeq: 2 INVITE.</div>
<div>Max-Forwards: 69.</div>
<div><br></div>
<div><br></div>
<div><br></div>
<div>U xx.yy.25.114:5060 -> xx.yy.56.226:5060</div>
<div>SIP/2.0 100 Trying.</div>
<div>Via: SIP/2.0/UDP xx.yy.56.226;branch=z9hG4bKf69b.0ced9bb7.0,SIP/2.0/UDP xx.yy.17.20;branch=z9hG4bK591c1114000026474b44616400001647000016f0.</div>
<div>From: "unknown" <sip:123456@xx.yy.56.226>;tag=152937654c2b.</div>
<div>To: <sip:987654@xx.yy.56.226>;tag=708A5698-428.</div>
<div>Date: Wed, 06 Jan 2010 09:59:05 GMT.</div>
<div>Call-ID: D17BF0696DC546A7B436401CD27774720x591c1114.</div>
<div>Server: Cisco-SIPGateway/IOS-12.x.</div>
<div>CSeq: 2 INVITE.</div>
<div>Allow-Events: telephone-event.</div>
<div>Content-Length: 0.</div>
<div><br></div>
<div><br></div>
<div><br></div>
<div>U xx.yy.25.114:5060 -> xx.yy.56.226:5060</div>
<div>SIP/2.0 183 Session Progress.</div>
<div>Via: SIP/2.0/UDP xx.yy.56.226;branch=z9hG4bKf69b.0ced9bb7.0,SIP/2.0/UDP xx.yy.17.20;branch=z9hG4bK591c1114000026474b44616400001647000016f0.</div>
<div>From: "unknown" <sip:123456@xx.yy.56.226>;tag=152937654c2b.</div>
<div>To: <sip:987654@xx.yy.56.226>;tag=708A5698-428.</div>
<div>Date: Wed, 06 Jan 2010 09:59:05 GMT.</div>
<div>Call-ID: D17BF0696DC546A7B436401CD27774720x591c1114.</div>
<div>Server: Cisco-SIPGateway/IOS-12.x.</div>
<div>CSeq: 2 INVITE.</div>
<div>Allow-Events: telephone-event.</div>
<div>Contact: <sip:987654@xx.yy.25.114:5060>.</div>
<div>Record-Route: <sip:xx.yy.56.226;lr=on;ftag=152937654c2b;did=b39.e643f344>.</div>
<div>Content-Disposition: session;handling=required.</div>
<div><br><br> </div>
<div>U xx.yy.56.226:5060 -> xx.yy.17.20:5060</div>
<div>SIP/2.0 183 Session Progress.</div>
<div>Via: SIP/2.0/UDP xx.yy.17.20;branch=z9hG4bK591c1114000026474b44616400001647000016f0.</div>
<div>From: "unknown" <sip:123456@xx.yy.56.226>;tag=152937654c2b.</div>
<div>To: <sip:987654@xx.yy.56.226>;tag=708A5698-428.</div>
<div>Date: Wed, 06 Jan 2010 09:59:05 GMT.</div>
<div>Call-ID: D17BF0696DC546A7B436401CD27774720x591c1114.</div>
<div>Server: Cisco-SIPGateway/IOS-12.x.</div>
<div>CSeq: 2 INVITE.</div>
<div>Allow-Events: telephone-event.</div>
<div>Contact: <sip:987654@xx.yy.25.114:5060>.</div>
<div>Record-Route: <sip:xx.yy.56.226;lr=on;ftag=152937654c2b;did=b39.e643f344>.</div>
<div><br></div>
<div><br></div>
<div><br></div>
<div>U xx.yy.25.114:5060 -> xx.yy.56.226:5060</div>
<div>SIP/2.0 200 OK.</div>
<div>Via: SIP/2.0/UDP xx.yy.56.226;branch=z9hG4bKf69b.0ced9bb7.0,SIP/2.0/UDP xx.yy.17.20;branch=z9hG4bK591c1114000026474b44616400001647000016f0.</div>
<div>From: "unknown" <sip:123456@xx.yy.56.226>;tag=152937654c2b.</div>
<div>To: <sip:987654@xx.yy.56.226>;tag=708A5698-428.</div>
<div>Date: Wed, 06 Jan 2010 09:59:05 GMT.</div>
<div>Call-ID: D17BF0696DC546A7B436401CD27774720x591c1114.</div>
<div>Server: Cisco-SIPGateway/IOS-12.x.</div>
<div>CSeq: 2 INVITE.</div>
<div>Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, COMET, REFER, SUBSCRIBE, NOTIFY, INFO.</div>
<div>Allow-Events: telephone-event.</div>
<div>Contact: <sip:987654@xx.yy.25.114:5060>.</div>
<div>Record-Route: <sip:xx.yy.56.226;lr=on;ftag=152937654c2b;did=b39.e643f344>.</div>
<div> </div>
<div><br></div>
<div><br></div>
<div><br></div>
<div>U xx.yy.56.226:5060 -> xx.yy.17.20:5060</div>
<div>SIP/2.0 200 OK.</div>
<div>Via: SIP/2.0/UDP xx.yy.17.20;branch=z9hG4bK591c1114000026474b44616400001647000016f0.</div>
<div>From: "unknown" <sip:123456@xx.yy.56.226>;tag=152937654c2b.</div>
<div>To: <sip:987654@xx.yy.56.226>;tag=708A5698-428.</div>
<div>Date: Wed, 06 Jan 2010 09:59:05 GMT.</div>
<div>Call-ID: D17BF0696DC546A7B436401CD27774720x591c1114.</div>
<div>Server: Cisco-SIPGateway/IOS-12.x.</div>
<div>CSeq: 2 INVITE.</div>
<div>Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, COMET, REFER, SUBSCRIBE, NOTIFY, INFO.</div>
<div>Allow-Events: telephone-event.</div>
<div>Contact: <sip:987654@xx.yy.25.114:5060>.</div>
<div>Record-Route: <sip:xx.yy.56.226;lr=on;ftag=152937654c2b;did=b39.e643f344>.</div>
<div> </div>
<div><br></div>
<div><br></div>
<div>U xx.yy.17.20:5060 -> xx.yy.56.226:5060</div>
<div>ACK sip:987654@xx.yy.25.114:5060 SIP/2.0.</div>
<div>Via: SIP/2.0/UDP xx.yy.17.20;branch=z9hG4bK591c1114000026474b44616500002441000016f6.</div>
<div>From: "unknown" <sip:123456@xx.yy.56.226>;tag=152937654c2b.</div>
<div>To: <sip:987654@xx.yy.56.226>;tag=708A5698-428.</div>
<div>Contact: <sip:123456@xx.yy.17.20>.</div>
<div>Call-ID: D17BF0696DC546A7B436401CD27774720x591c1114.</div>
<div>CSeq: 2 ACK.</div>
<div>Max-Forwards: 70.</div>
<div>User-Agent: SJphone/1.65.377a (SJ Labs).</div>
<div>Content-Length: 0.</div>
<div>Route: <sip:xx.yy.56.226;lr=on;ftag=152937654c2b;did=b39.e643f344>.</div>
<div>Proxy-Authorization: Digest username="123456",realm="xx.yy.56.226",nonce="4b43ec220000000883661dbea2617b91d28401983dd85b7d",uri="sip:987654@xx.yy.56.226",response="91a62cf62af7870c1e24d6c35857e78d".</div>
<div><br></div>
<div><br></div>
<div><br></div>
<div>U xx.yy.25.114:5060 -> xx.yy.56.226:5060</div>
<div>SIP/2.0 200 OK.</div>
<div>Via: SIP/2.0/UDP xx.yy.56.226;branch=z9hG4bKf69b.0ced9bb7.0,SIP/2.0/UDP xx.yy.17.20;branch=z9hG4bK591c1114000026474b44616400001647000016f0.</div>
<div>From: "unknown" <sip:123456@xx.yy.56.226>;tag=152937654c2b.</div>
<div>To: <sip:987654@xx.yy.56.226>;tag=708A5698-428.</div>
<div>Date: Wed, 06 Jan 2010 09:59:05 GMT.</div>
<div>Call-ID: D17BF0696DC546A7B436401CD27774720x591c1114.</div>
<div>Server: Cisco-SIPGateway/IOS-12.x.</div>
<div>CSeq: 2 INVITE.</div>
<div>Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, COMET, REFER, SUBSCRIBE, NOTIFY, INFO.</div>
<div>Allow-Events: telephone-event.</div>
<div>Contact: <sip:987654@xx.yy.25.114:5060>.</div>
<div>Record-Route: <sip:xx.yy.56.226;lr=on;ftag=152937654c2b;did=b39.e643f344>.</div>
<div>Content-Type: application/sdp.</div>
<div>Content-Length: 234.</div>
<div><br></div>
<div><br></div>
<div><br></div>
<div>U xx.yy.56.226:5060 -> xx.yy.17.20:5060</div>
<div>SIP/2.0 200 OK.</div>
<div>Via: SIP/2.0/UDP xx.yy.17.20;branch=z9hG4bK591c1114000026474b44616400001647000016f0.</div>
<div>From: "unknown" <sip:123456@xx.yy.56.226>;tag=152937654c2b.</div>
<div>To: <sip:987654@xx.yy.56.226>;tag=708A5698-428.</div>
<div>Date: Wed, 06 Jan 2010 09:59:05 GMT.</div>
<div>Call-ID: D17BF0696DC546A7B436401CD27774720x591c1114.</div>
<div>Server: Cisco-SIPGateway/IOS-12.x.</div>
<div>CSeq: 2 INVITE.</div>
<div>Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, COMET, REFER, SUBSCRIBE, NOTIFY, INFO.</div>
<div>Allow-Events: telephone-event.</div>
<div>Contact: <sip:987654@xx.yy.25.114:5060>.</div>
<div>Record-Route: <sip:xx.yy.56.226;lr=on;ftag=152937654c2b;did=b39.e643f344>.</div>
<div>Content-Type: application/sdp.</div>
<div>Content-Length: 234.</div>
<div><br></div>
<div><br></div>
<div><br></div>
<div>U xx.yy.17.20:5060 -> xx.yy.56.226:5060</div>
<div>ACK sip:987654@xx.yy.25.114:5060 SIP/2.0.</div>
<div>Via: SIP/2.0/UDP xx.yy.17.20;branch=z9hG4bK591c1114000026474b44616500002441000016f6.</div>
<div>From: "unknown" <sip:123456@xx.yy.56.226>;tag=152937654c2b.</div>
<div>To: <sip:987654@xx.yy.56.226>;tag=708A5698-428.</div>
<div>Contact: <sip:123456@xx.yy.17.20>.</div>
<div>Call-ID: D17BF0696DC546A7B436401CD27774720x591c1114.</div>
<div>CSeq: 2 ACK.</div>
<div>Max-Forwards: 70.</div>
<div>User-Agent: SJphone/1.65.377a (SJ Labs).</div>
<div>Content-Length: 0.</div>
<div>Route: <sip:xx.yy.56.226;lr=on;ftag=152937654c2b;did=b39.e643f344>.</div>
<div>Proxy-Authorization: Digest username="123456",realm="xx.yy.56.226",nonce="4b43ec220000000883661dbea2617b91d28401983dd85b7d",uri="sip:987654@xx.yy.56.226",response="91a62cf62af7870c1e24d6c35857e78d".</div>
<div><br></div>
<div><br></div>
<div><br></div>
<div>U xx.yy.25.114:5060 -> xx.yy.56.226:5060</div>
<div>SIP/2.0 200 OK.</div>
<div>Via: SIP/2.0/UDP xx.yy.56.226;branch=z9hG4bKf69b.0ced9bb7.0,SIP/2.0/UDP xx.yy.17.20;branch=z9hG4bK591c1114000026474b44616400001647000016f0.</div>
<div>From: "unknown" <sip:123456@xx.yy.56.226>;tag=152937654c2b.</div>
<div>To: <sip:987654@xx.yy.56.226>;tag=708A5698-428.</div>
<div>Date: Wed, 06 Jan 2010 09:59:05 GMT.</div>
<div>Call-ID: D17BF0696DC546A7B436401CD27774720x591c1114.</div>
<div>Server: Cisco-SIPGateway/IOS-12.x.</div>
<div>CSeq: 2 INVITE.</div>
<div>Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, COMET, REFER, SUBSCRIBE, NOTIFY, INFO.</div>
<div>Allow-Events: telephone-event.</div>
<div>Contact: <sip:987654@xx.yy.25.114:5060>.</div>
<div>Record-Route: <sip:xx.yy.56.226;lr=on;ftag=152937654c2b;did=b39.e643f344>.</div>
<div>Content-Type: application/sdp.</div>
<div>Content-Length: 234.</div>
<div><br></div>
<div><br></div>
<div><br></div>
<div>U xx.yy.56.226:5060 -> xx.yy.17.20:5060</div>
<div>SIP/2.0 200 OK.</div>
<div>Via: SIP/2.0/UDP xx.yy.17.20;branch=z9hG4bK591c1114000026474b44616400001647000016f0.</div>
<div>From: "unknown" <sip:123456@xx.yy.56.226>;tag=152937654c2b.</div>
<div>To: <sip:987654@xx.yy.56.226>;tag=708A5698-428.</div>
<div>Date: Wed, 06 Jan 2010 09:59:05 GMT.</div>
<div>Call-ID: D17BF0696DC546A7B436401CD27774720x591c1114.</div>
<div>Server: Cisco-SIPGateway/IOS-12.x.</div>
<div>CSeq: 2 INVITE.</div>
<div>Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, COMET, REFER, SUBSCRIBE, NOTIFY, INFO.</div>
<div>Allow-Events: telephone-event.</div>
<div>Contact: <sip:987654@xx.yy.25.114:5060>.</div>
<div>Record-Route: <sip:xx.yy.56.226;lr=on;ftag=152937654c2b;did=b39.e643f344>.</div>
<div>Content-Type: application/sdp.</div>
<div>Content-Length: 234.</div>
<div><br></div>
<div><br></div>
<div><br></div>
<div>U xx.yy.17.20:5060 -> xx.yy.56.226:5060</div>
<div>ACK sip:987654@xx.yy.25.114:5060 SIP/2.0.</div>
<div>Via: SIP/2.0/UDP xx.yy.17.20;branch=z9hG4bK591c1114000026474b44616500002441000016f6.</div>
<div>From: "unknown" <sip:123456@xx.yy.56.226>;tag=152937654c2b.</div>
<div>To: <sip:987654@xx.yy.56.226>;tag=708A5698-428.</div>
<div>Contact: <sip:123456@xx.yy.17.20>.</div>
<div>Call-ID: D17BF0696DC546A7B436401CD27774720x591c1114.</div>
<div>CSeq: 2 ACK.</div>
<div>Max-Forwards: 70.</div>
<div>User-Agent: SJphone/1.65.377a (SJ Labs).</div>
<div>Content-Length: 0.</div>
<div>Route: <sip:xx.yy.56.226;lr=on;ftag=152937654c2b;did=b39.e643f344>.</div>
<div>Proxy-Authorization: Digest username="123456",realm="xx.yy.56.226",nonce="4b43ec220000000883661dbea2617b91d28401983dd85b7d",uri="sip:987654@xx.yy.56.226",response="91a62cf62af7870c1e24d6c35857e78d".</div>
<div><br></div>
<div><br></div>
<div><br></div>
<div>U xx.yy.25.114:5060 -> xx.yy.56.226:5060</div>
<div>SIP/2.0 200 OK.</div>
<div>Via: SIP/2.0/UDP xx.yy.56.226;branch=z9hG4bKf69b.0ced9bb7.0,SIP/2.0/UDP xx.yy.17.20;branch=z9hG4bK591c1114000026474b44616400001647000016f0.</div>
<div>From: "unknown" <sip:123456@xx.yy.56.226>;tag=152937654c2b.</div>
<div>To: <sip:987654@xx.yy.56.226>;tag=708A5698-428.</div>
<div>Date: Wed, 06 Jan 2010 09:59:05 GMT.</div>
<div>Call-ID: D17BF0696DC546A7B436401CD27774720x591c1114.</div>
<div>Server: Cisco-SIPGateway/IOS-12.x.</div>
<div>CSeq: 2 INVITE.</div>
<div>Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, COMET, REFER, SUBSCRIBE, NOTIFY, INFO.</div>
<div>Allow-Events: telephone-event.</div>
<div>Contact: <sip:987654@xx.yy.25.114:5060>.</div>
<div>Record-Route: <sip:xx.yy.56.226;lr=on;ftag=152937654c2b;did=b39.e643f344>.</div>
<div>Content-Type: application/sdp.</div>
<div>Content-Length: 234.</div>
<div><br></div></div></div></div></div>
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