Hello Everyone,<br><br>I am facing a problem when I am trying&nbsp; to send calls from my Openser(1.1.0) to another<br>sip switch &quot;MERA MSIP v.1.0.2.&quot; <br><br>Here is the senario:<br><br>openser( PublicIP <a href="http://54.15.32.44">
54.15.32.44</a>)&nbsp; &lt;====&gt;&nbsp; Mera Sip Switch(PublicIP <a href="http://52.132.36.43">52.132.36.43</a>)<br>=======================&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ==========================<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; INVITE&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ------------------&gt;&nbsp; 
<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;-----------------&nbsp;&nbsp;&nbsp; 100 Trying<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;-----------------&nbsp;&nbsp;&nbsp; 183 Session Progress<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;-----------------&nbsp;&nbsp;&nbsp; 200 OK (for invite)
<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; CANCEL&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; -------------------&gt;&nbsp; <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;-----------------&nbsp;&nbsp;&nbsp; 200 OK (for cancel)<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;-----------------&nbsp;&nbsp;&nbsp; 487 Request Terminated
<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ACK&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; -------------------&gt;&nbsp; <br><br>This seems quite normal senario but prolem is that this &quot;CANCEL&quot; is not generated by the<br>end point (in mycase IP Phone in public IP). This &quot;CANCEL&quot; generated from openser just after receiving the 200 OK of INVITE request. 
<br><br>Why openser generateing a CANCEL while it already received 200 OK for that INVITE??<br><br>Here is my openser configuration script: openser.cfg<br><br>===================Script Begin===========================<br>
<br># USE THIS VERSION IS REGISTER<br># ----------- global configuration parameters ------------------------<br><br>debug=3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; # debug level (cmd line: -dddddddddd)<br>fork=yes<br>log_stderror=no&nbsp;&nbsp;&nbsp; # (cmd line: -E)<br>
<br>/* Uncomment these lines to enter debugging mode <br>fork=no<br>log_stderror=yes<br>*/<br>log_facility=LOG_LOCAL0<br><br>listen=<a href="http://54.15.32.44">54.15.32.44</a><br>alias=&quot;<a href="http://sip.myfone.com">
sip.myfone.com</a>&quot;<br><br>check_via=no&nbsp;&nbsp;&nbsp; # (cmd. line: -v)<br>dns=no&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; # (cmd. line: -r)<br>rev_dns=no&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; # (cmd. line: -R)<br>port=5060<br>children=4<br>fifo=&quot;/tmp/openser_fifo&quot;<br><br># ------------------ module loading ----------------------------------
<br><br>mpath=&quot;/usr/local/openser/lib/openser/modules/&quot;<br><br># Uncomment this if you want to use SQL database<br>#loadmodule &quot;mysql.so&quot;<br><br>loadmodule &quot;exec.so&quot;<br>loadmodule &quot;sl.so
&quot;<br>loadmodule &quot;tm.so&quot;<br>loadmodule &quot;rr.so&quot;<br>loadmodule &quot;maxfwd.so&quot;<br>loadmodule &quot;usrloc.so&quot;<br>loadmodule &quot;registrar.so&quot;<br>loadmodule &quot;textops.so&quot;<br>
loadmodule &quot;xlog.so&quot;<br>loadmodule &quot;auth.so&quot;<br>loadmodule &quot;auth_radius.so&quot;<br>loadmodule &quot;acc.so&quot;<br>loadmodule &quot;nathelper.so&quot;<br><br># ----------------- setting module-specific parameters ---------------
<br><br># -- usrloc params --<br><br>modparam(&quot;usrloc&quot;, &quot;db_mode&quot;,&nbsp;&nbsp; 0)<br><br># -- rr params --<br># add value to ;lr param to make some broken UAs happy<br>modparam(&quot;rr&quot;, &quot;enable_full_lr&quot;, 1)
<br>#modparam(&quot;rr&quot;, &quot;enable_double_rr&quot;, 1)<br><br># For fail over<br># -- tm params --<br># set time for which ser will be waiting for a final response;<br># fr_inv_timer sets value for INVITE transactions, fr_timer
<br># for all others<br>modparam(&quot;tm&quot;, &quot;fr_inv_timer&quot;, 60 )<br>modparam(&quot;tm&quot;, &quot;fr_timer&quot;, 30 )<br><br>#for Radius Accounting<br>modparam(&quot;acc&quot;, &quot;radius_flag&quot;, 1 )
<br>modparam(&quot;acc&quot;, &quot;radius_missed_flag&quot;, 3 )<br><br># !! Nathelper<br>modparam(&quot;registrar&quot;, &quot;nat_flag&quot;, 6)<br>modparam(&quot;nathelper&quot;, &quot;natping_interval&quot;, 30) # Ping interval 30 s
<br>modparam(&quot;nathelper&quot;, &quot;ping_nated_only&quot;, 1)&nbsp;&nbsp; # Ping only clients behind NAT<br><br>## Just for Fun,It shows color Log<br>modparam(&quot;xlog&quot;, &quot;force_color&quot;, 1)<br><br># -------------------------&nbsp; request routing logic -------------------
<br><br># main routing logic<br><br>route{<br>&nbsp;&nbsp;&nbsp; if (!mf_process_maxfwd_header(&quot;10&quot;)) {<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; sl_send_reply(&quot;483&quot;,&quot;Too Many Hops&quot;);<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; exit;<br>&nbsp;&nbsp;&nbsp; };<br>&nbsp;&nbsp;&nbsp; if (msg:len &gt;=&nbsp; 2048 ) {
<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; sl_send_reply(&quot;513&quot;, &quot;Message too big&quot;);<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; exit;<br>&nbsp;&nbsp;&nbsp; };<br><br>&nbsp;&nbsp;&nbsp; route(2);<br>&nbsp;&nbsp;&nbsp; <br>&nbsp;&nbsp;&nbsp; if (!method==&quot;REGISTER&quot;)<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; record_route();<br><br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; if(method==&quot;INVITE&quot; || method==&quot;BYE&quot;)
<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; setflag(1);<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <br><br>&nbsp;&nbsp;&nbsp; if (loose_route()) {<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; append_hf(&quot;P-hint: rr-enforced\r\n&quot;); <br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; route(1);<br>&nbsp;&nbsp;&nbsp; };<br><br>&nbsp;&nbsp;&nbsp; if (!uri==myself) {<br>
&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; append_hf(&quot;P-hint: outbound\r\n&quot;); <br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; route(1);<br>&nbsp;&nbsp;&nbsp; };<br><br>&nbsp;&nbsp;&nbsp; #This is the best place for rewrite host port<br><br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; if (!method==&quot;REGISTER&quot;) {<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; rewritehostport(&quot;
<a href="http://52.132.36.43:5060">52.132.36.43:5060</a>&quot;);&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; };<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <br><br>&nbsp;&nbsp;&nbsp; if (uri==myself) {
<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; if (method==&quot;REGISTER&quot;) {<br><br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; if (!radius_www_authorize(&quot;<a href="http://54.15.32.44">54.15.32.44</a>&quot;)) {<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; www_challenge(&quot;<a href="http://54.15.32.44">
54.15.32.44</a>&quot;, &quot;0&quot;);&nbsp;&nbsp;&nbsp; <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; exit;<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; };<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; if (isflagset(5)) {
<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; setflag(6);<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; # if you want OPTIONS natpings uncomment next<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; # setflag(7);<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; };<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; save(&quot;location&quot;);<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; exit;<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; };
<br><br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; if (!lookup(&quot;location&quot;)) {<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; sl_send_reply(&quot;404&quot;, &quot;Not Found&quot;);<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; exit;<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; };<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; append_hf(&quot;P-hint: usrloc applied\r\n&quot;); <br>
&nbsp;&nbsp;&nbsp; };<br><br>&nbsp;&nbsp;&nbsp; route(1);<br>}<br><br><br>route[1] {<br>&nbsp;&nbsp;&nbsp; if (subst_uri('/(sip:.*);nat=yes/\1/')){<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; setflag(6);<br>&nbsp;&nbsp;&nbsp; };<br><br>&nbsp;&nbsp;&nbsp; if (isflagset(5)||isflagset(6)) {<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; route(3);<br>&nbsp;&nbsp;&nbsp; }<br>&nbsp;&nbsp;&nbsp; <br>
&nbsp;&nbsp;&nbsp; if (!t_relay()) {<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; sl_reply_error();<br>&nbsp;&nbsp;&nbsp; };<br>&nbsp;&nbsp;&nbsp; exit;<br>}<br><br>route[2]{<br>&nbsp;&nbsp;&nbsp; force_rport();<br>&nbsp;&nbsp;&nbsp; if (nat_uac_test(&quot;19&quot;)) {<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; if (method==&quot;REGISTER&quot;) {<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; fix_nated_register();
<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; } else {<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; fix_nated_contact();<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; };<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; setflag(5);<br>&nbsp;&nbsp;&nbsp; };<br><br>&nbsp;&nbsp;&nbsp; if (method==&quot;INVITE&quot;) {<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; xlog(&quot;L_INFO&quot;, &quot;Invite -&gt; [CallerID=$fu] and [DialedNo=$tU]\n&quot;);
<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; if(uri=~&quot;sip:[0-9]{20,}@.+&quot;)<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; sl_send_reply(&quot;513&quot;, &quot;Message too big&quot;);<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; exit;<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; };
<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; <br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; if (!radius_www_authorize(&quot;<a href="http://54.15.32.44">54.15.32.44</a>&quot;)) {<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; www_challenge(&quot;<a href="http://54.15.32.44">54.15.32.44</a>&quot;, &quot;0&quot;);&nbsp;&nbsp;&nbsp;&nbsp; <br>
&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; exit;<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; };<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; consume_credentials();<br>&nbsp;&nbsp;&nbsp; };<br>}<br><br>route[3] {<br>&nbsp;&nbsp;&nbsp; if (is_method(&quot;BYE|CANCEL&quot;)) {<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; unforce_rtp_proxy();<br>&nbsp;&nbsp;&nbsp; } else if (is_method(&quot;INVITE&quot;)){
<br>#&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; xlog(&quot;L_INFO&quot;,&quot;Invite -&gt; Force Rtp Proxy&quot;);<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; if (!search(&quot;^Content-Length:[ ]*0&quot;))<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; {<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; force_rtp_proxy();<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; }<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; t_on_failure(&quot;1&quot;);
<br>&nbsp;&nbsp;&nbsp; };<br>&nbsp;&nbsp;&nbsp; if (isflagset(5))<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; search_append('Contact:.*sip:[^&gt;[:cntrl:]]*', ';nat=yes;lr=on');<br><br>&nbsp;&nbsp;&nbsp; t_on_reply(&quot;1&quot;);<br>}<br><br><br>failure_route[1] {<br><br>&nbsp;&nbsp;&nbsp; if(!t_was_cancelled())
<br>&nbsp;&nbsp;&nbsp; {<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; rewritehostport(&quot;<a href="http://52.132.36.43:5060">52.132.36.43:5060</a>&quot;);<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; xlog(&quot;L_INFO&quot;,&quot;Invite -&gt; Fail Over Route 1&nbsp; at Time [$Tf]&quot;);<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; if (!search(&quot;^Content-Length:[ ]*0&quot;))
<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; {<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; force_rtp_proxy();<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; t_on_failure(&quot;2&quot;);<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; t_relay();
<br>&nbsp;&nbsp;&nbsp; }<br>}<br><br>failure_route[2] {<br><br>if(!t_was_cancelled())<br>&nbsp;&nbsp; {<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; rewritehostport(&quot;<a href="http://52.132.36.43:5060">52.132.36.43:5060</a>&quot;);<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; xlog(&quot;L_INFO&quot;,&quot;Invite -&gt; Fail Over Route 2&nbsp; at Time [$Tf]&quot;);
<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; if (!search(&quot;^Content-Length:[ ]*0&quot;))<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; force_rtp_proxy();<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; t_on_failure(&quot;3&quot;);<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; t_relay();<br>&nbsp;&nbsp; }<br>}<br><br>failure_route[3] {
<br><br>if(!t_was_cancelled())<br>&nbsp;&nbsp; {<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; rewritehostport(&quot;<a href="http://52.132.36.43:5060">52.132.36.43:5060</a>&quot;);<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; xlog(&quot;L_INFO&quot;,&quot;Invite -&gt; Fail Over Route 3&nbsp; at Time [$Tf]&quot;);
<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; if (!search(&quot;^Content-Length:[ ]*0&quot;))<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; force_rtp_proxy();<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; t_on_failure(&quot;4&quot;);<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; t_relay();<br>&nbsp;&nbsp; }<br>}<br><br>failure_route[4] {
<br>if(!t_was_cancelled())<br>&nbsp;&nbsp; {<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; rewritehostport(&quot;<a href="http://52.132.36.43:5060">52.132.36.43:5060</a>&quot;);<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; xlog(&quot;L_INFO&quot;,&quot;Invite -&gt; Fail Over Route 4&nbsp; at Time [$Tf]&quot;);
<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; if (!search(&quot;^Content-Length:[ ]*0&quot;))<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; force_rtp_proxy();<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }<br><br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; t_on_failure(&quot;5&quot;);<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; t_relay();<br>&nbsp;&nbsp; }<br>}<br><br><br>failure_route[5] {
<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; if (isflagset(6) || isflagset(5)) {<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; unforce_rtp_proxy();<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }<br>}<br><br>onreply_route[1] {<br><br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; if (!search(&quot;^Content-Length:[ ]*0&quot;))<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; {<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; force_rtp_proxy(&quot;r&quot;);
<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; }<br><br>&nbsp;&nbsp;&nbsp; search_append('Contact:.*sip:[^&gt;[:cntrl:]]*', ';nat=yes');<br><br>&nbsp;&nbsp;&nbsp; if (isflagset(6)) {<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; fix_nated_contact();<br>&nbsp;&nbsp;&nbsp; }<br><br>&nbsp;&nbsp;&nbsp; exit;<br>}<br><br>==========================Script End======================
<br><br><br>Here is the sip trace (from ngrep):<br><br><br>U IP Phone -&gt; Openser<br>INVITE <a href="mailto:sip:9128222570841@54.15.32.44">sip:9128222570841@54.15.32.44</a> SIP/2.0.<br>Via: SIP/2.0/UDP <a href="http://58.88.13.13:5060">
58.88.13.13:5060</a>;branch=z9hG4bKI7LP7qhgGKFHt904;rport.<br>Max-Forwards: 70.<br>User-Agent: PA168S V1.55.013 CFG0 .<br>From: &quot;561705239298&quot; &lt;<a href="mailto:sip:561705239298@54.15.32.44">sip:561705239298@54.15.32.44
</a>&gt;;tag=1pRGOP6lOmlBFIxy.<br>To: &quot;9128222570841&quot; &lt;<a href="mailto:sip:9128222570841@54.15.32.44">sip:9128222570841@54.15.32.44</a>&gt;.<br>Call-ID: <a href="mailto:BCmB3zph5YmuC8oz@58.88.13.13">BCmB3zph5YmuC8oz@58.88.13.13
</a>.<br>Contact: &lt;sip:561705239298@58.88.13.13:5060&gt;.<br>Authorization: Digest username=&quot;561705239298&quot;, realm=&quot;<a href="http://54.15.32.44">54.15.32.44</a>&quot;, nonce=&quot;4577de9a6e32a8fafc108687cbc9b520cfd2b1ea&quot;, uri=&quot;
<a href="mailto:sip:9128222570841@54.15.32.44">sip:9128222570841@54.15.32.44</a>&quot;, response=&quot;c18eeb314b2c5524ab3d7fe50b52851c&quot;, algorithm=MD5.<br>CSeq: 2 INVITE.<br>Supported: replaces.<br>Content-Type: application/sdp.
<br>Content-Length: 134.<br>.<br>v=0.<br>o=- 12369099 22311551 IN IP4 <a href="http://58.88.13.13">58.88.13.13</a>.<br>s=SIP CALL.<br>c=IN IP4 <a href="http://58.88.13.13">58.88.13.13</a>.<br>t=0 0.<br>m=audio 8704 RTP/AVP 4.
<br>a=rtpmap:4 G723/8000.<br><br>#<br>U Openser -&gt; IP PHONE<br>SIP/2.0 100 trying -- your call is important to us.<br>Via: SIP/2.0/UDP <a href="http://58.88.13.13:5060">58.88.13.13:5060</a>;branch=z9hG4bKI7LP7qhgGKFHt904;rport=5060.
<br>From: &quot;561705239298&quot; &lt;<a href="mailto:sip:561705239298@54.15.32.44">sip:561705239298@54.15.32.44</a>&gt;;tag=1pRGOP6lOmlBFIxy.<br>To: &quot;9128222570841&quot; &lt;<a href="mailto:sip:9128222570841@54.15.32.44">
sip:9128222570841@54.15.32.44</a>&gt;.<br>Call-ID: <a href="mailto:BCmB3zph5YmuC8oz@58.88.13.13">BCmB3zph5YmuC8oz@58.88.13.13</a>.<br>CSeq: 2 INVITE.<br>Server: openser (1.1.0 (i386/linux)).<br>Content-Length: 0.<br>Warning: 392 
<a href="http://54.15.32.44:5060">54.15.32.44:5060</a> &quot;Noisy feedback tells:&nbsp; pid=27317 req_src_ip=<a href="http://58.88.13.13">58.88.13.13</a> req_src_port=5060 in_uri=<a href="mailto:sip:9128222570841@54.15.32.44">
sip:9128222570841@54.15.32.44</a> out_uri=sip:9128222570841@52.132.36.43:5060 via_cnt==1&quot;.<br>.<br><br>#<br>U Openser -&gt; Mera<br>INVITE sip:9128222570841@52.132.36.43:5060 SIP/2.0.<br>Record-Route: &lt;sip:<a href="http://54.15.32.44">
54.15.32.44</a>;lr=on;ftag=1pRGOP6lOmlBFIxy&gt;.<br>Via: SIP/2.0/UDP <a href="http://54.15.32.44">54.15.32.44</a>;branch=z9hG4bKa124.220e0023.0.<br>Via: SIP/2.0/UDP <a href="http://58.88.13.13:5060">58.88.13.13:5060</a>;branch=z9hG4bKI7LP7qhgGKFHt904;rport=5060.
<br>Max-Forwards: 69.<br>User-Agent: PA168S V1.55.013 CFG0 .<br>From: &quot;561705239298&quot; &lt;<a href="mailto:sip:561705239298@54.15.32.44">sip:561705239298@54.15.32.44</a>&gt;;tag=1pRGOP6lOmlBFIxy.<br>To: &quot;9128222570841&quot; &lt;
<a href="mailto:sip:9128222570841@54.15.32.44">sip:9128222570841@54.15.32.44</a>&gt;.<br>Call-ID: <a href="mailto:BCmB3zph5YmuC8oz@58.88.13.13">BCmB3zph5YmuC8oz@58.88.13.13</a>.<br>Contact: &lt;sip:561705239298@58.88.13.13
:5060&gt;.<br>CSeq: 2 INVITE.<br>Supported: replaces.<br>Content-Type: application/sdp.<br>Content-Length: 152.<br>.<br>v=0.<br>o=- 12369099 22311551 IN IP4 <a href="http://58.88.13.13">58.88.13.13</a>.<br>s=SIP CALL.<br>
c=IN IP4 <a href="http://54.15.32.44">54.15.32.44</a>.<br>t=0 0.<br>m=audio 39780 RTP/AVP 4.<br>a=rtpmap:4 G723/8000.<br>a=nortpproxy:yes.<br><br>#<br>U Openser -&gt; Mera<br>INVITE sip:9128222570841@52.132.36.43:5060 SIP/2.0.
<br>Record-Route: &lt;sip:<a href="http://54.15.32.44">54.15.32.44</a>;lr=on;ftag=1pRGOP6lOmlBFIxy&gt;.<br>Via: SIP/2.0/UDP <a href="http://54.15.32.44">54.15.32.44</a>;branch=z9hG4bKa124.220e0023.1.<br>Via: SIP/2.0/UDP <a href="http://58.88.13.13:5060">
58.88.13.13:5060</a>;branch=z9hG4bKI7LP7qhgGKFHt904;rport=5060.<br>Max-Forwards: 69.<br>User-Agent: PA168S V1.55.013 CFG0 .<br>From: &quot;561705239298&quot; &lt;<a href="mailto:sip:561705239298@54.15.32.44">sip:561705239298@54.15.32.44
</a>&gt;;tag=1pRGOP6lOmlBFIxy.<br>To: &quot;9128222570841&quot; &lt;<a href="mailto:sip:9128222570841@54.15.32.44">sip:9128222570841@54.15.32.44</a>&gt;.<br>Call-ID: <a href="mailto:BCmB3zph5YmuC8oz@58.88.13.13">BCmB3zph5YmuC8oz@58.88.13.13
</a>.<br>Contact: &lt;sip:561705239298@58.88.13.13:5060&gt;.<br>CSeq: 2 INVITE.<br>Supported: replaces.<br>Content-Type: application/sdp.<br>Content-Length: 152.<br>.<br>v=0.<br>o=- 12369099 22311551 IN IP4 <a href="http://58.88.13.13">
58.88.13.13</a>.<br>s=SIP CALL.<br>c=IN IP4 <a href="http://54.15.32.44">54.15.32.44</a>.<br>t=0 0.<br>m=audio 39780 RTP/AVP 4.<br>a=rtpmap:4 G723/8000.<br>a=nortpproxy:yes.<br><br>#<br>U Mera -&gt; Openser<br>SIP/2.0 100 Trying.
<br>Via: SIP/2.0/UDP <a href="http://54.15.32.44">54.15.32.44</a>;branch=z9hG4bKa124.220e0023.0,SIP/2.0/UDP <a href="http://58.88.13.13:5060">58.88.13.13:5060</a>;branch=z9hG4bKI7LP7qhgGKFHt904;rport=5060.<br>From: &quot;561705239298&quot; &lt;
<a href="mailto:sip:561705239298@54.15.32.44">sip:561705239298@54.15.32.44</a>&gt;;tag=1pRGOP6lOmlBFIxy.<br>To: &quot;9128222570841&quot; &lt;<a href="mailto:sip:9128222570841@54.15.32.44">sip:9128222570841@54.15.32.44</a>
&gt;.<br>Call-ID: <a href="mailto:BCmB3zph5YmuC8oz@58.88.13.13">BCmB3zph5YmuC8oz@58.88.13.13</a>.<br>CSeq: 2 INVITE.<br>Content-Length: 0.<br>.<br><br>#<br>U Mera -&gt; Openser<br>SIP/2.0 100 Trying.<br>Via: SIP/2.0/UDP <a href="http://54.15.32.44">
54.15.32.44</a>;branch=z9hG4bKa124.220e0023.1,SIP/2.0/UDP <a href="http://58.88.13.13:5060">58.88.13.13:5060</a>;branch=z9hG4bKI7LP7qhgGKFHt904;rport=5060.<br>From: &quot;561705239298&quot; &lt;<a href="mailto:sip:561705239298@54.15.32.44">
sip:561705239298@54.15.32.44</a>&gt;;tag=1pRGOP6lOmlBFIxy.<br>To: &quot;9128222570841&quot; &lt;<a href="mailto:sip:9128222570841@54.15.32.44">sip:9128222570841@54.15.32.44</a>&gt;.<br>Call-ID: <a href="mailto:BCmB3zph5YmuC8oz@58.88.13.13">
BCmB3zph5YmuC8oz@58.88.13.13</a>.<br>CSeq: 2 INVITE.<br>Content-Length: 0.<br>.<br><br><br>#<br>U Mera -&gt; Openser<br>SIP/2.0 183 Session Progress.<br>Record-Route: &lt;sip:<a href="http://52.132.36.43:5060">52.132.36.43:5060
</a>;lr&gt;,&lt;sip:<a href="http://54.15.32.44">54.15.32.44</a>;lr=on;ftag=1pRGOP6lOmlBFIxy&gt;.<br>From: &quot;561705239298&quot; &lt;<a href="mailto:sip:561705239298@54.15.32.44">sip:561705239298@54.15.32.44</a>&gt;;tag=1pRGOP6lOmlBFIxy.
<br>To: &quot;9128222570841&quot; &lt;<a href="mailto:sip:9128222570841@54.15.32.44">sip:9128222570841@54.15.32.44</a>&gt;;tag=ffff1200ffff7710ff00000f1f6fff3b.<br>Call-ID: <a href="mailto:BCmB3zph5YmuC8oz@58.88.13.13">BCmB3zph5YmuC8oz@58.88.13.13
</a>.<br>CSeq: 2 INVITE.<br>Server: MERA MSIP v.1.0.2.<br>Contact: &lt;sip:9128222570841@52.132.36.43:5060&gt;.<br>Content-Type: application/sdp.<br>Via: SIP/2.0/UDP <a href="http://54.15.32.44:5060">54.15.32.44:5060</a>;branch=
z9hG4bKa124.220e0023.0,SIP/2.0/UDP <a href="http://58.88.13.13:5060">58.88.13.13:5060</a>;branch=z9hG4bKI7LP7qhgGKFHt904;rport=5060.<br>Content-Length: 136.<br>.<br>v=0.<br>o=- 1165483497 1165483497 IN IP4 <a href="http://52.132.36.43">
52.132.36.43</a>.<br>s=-.<br>c=IN IP4 <a href="http://52.132.36.43">52.132.36.43</a>.<br>t=0 0.<br>m=audio 37548 RTP/AVP 4.<br>a=rtpmap:4 G723/8000.<br>.<br><br><br>#<br>U Openser&nbsp; -&gt; IP PHONE<br>SIP/2.0 183 Session Progress.
<br>Record-Route: &lt;sip:<a href="http://52.132.36.43:5060">52.132.36.43:5060</a>;lr&gt;,&lt;sip:<a href="http://54.15.32.44">54.15.32.44</a>;lr=on;ftag=1pRGOP6lOmlBFIxy&gt;.<br>From: &quot;561705239298&quot; &lt;<a href="mailto:sip:561705239298@54.15.32.44">
sip:561705239298@54.15.32.44</a>&gt;;tag=1pRGOP6lOmlBFIxy.<br>To: &quot;9128222570841&quot; &lt;<a href="mailto:sip:9128222570841@54.15.32.44">sip:9128222570841@54.15.32.44</a>&gt;;tag=ffff1200ffff7710ff00000f1f6fff3b.<br>
Call-ID: <a href="mailto:BCmB3zph5YmuC8oz@58.88.13.13">BCmB3zph5YmuC8oz@58.88.13.13</a>.<br>CSeq: 2 INVITE.<br>Server: MERA MSIP v.1.0.2.<br>Contact: &lt;sip:9128222570841@52.132.36.43:5060;nat=yes&gt;.<br>Content-Type: application/sdp.
<br>Via: SIP/2.0/UDP <a href="http://58.88.13.13:5060">58.88.13.13:5060</a>;branch=z9hG4bKI7LP7qhgGKFHt904;rport=5060.<br>Content-Length: 153.<br>.<br>v=0.<br>o=- 1165483497 1165483497 IN IP4 <a href="http://52.132.36.43">
52.132.36.43</a>.<br>s=-.<br>c=IN IP4 <a href="http://54.15.32.44">54.15.32.44</a>.<br>t=0 0.<br>m=audio 39784 RTP/AVP 4.<br>a=rtpmap:4 G723/8000.<br>.<br>a=nortpproxy:yes.<br><br>#<br>U Mera -&gt; Openser<br>SIP/2.0 200 OK.
<br>Record-Route: &lt;sip:<a href="http://52.132.36.43:5060">52.132.36.43:5060</a>;lr&gt;,&lt;sip:<a href="http://54.15.32.44">54.15.32.44</a>;lr=on;ftag=1pRGOP6lOmlBFIxy&gt;.<br>From: &quot;561705239298&quot; &lt;<a href="mailto:sip:561705239298@54.15.32.44">
sip:561705239298@54.15.32.44</a>&gt;;tag=1pRGOP6lOmlBFIxy.<br>To: &quot;9128222570841&quot; &lt;<a href="mailto:sip:9128222570841@54.15.32.44">sip:9128222570841@54.15.32.44</a>&gt;;tag=ffff1200ffff7710ff00000f1f6fff3b.<br>
Call-ID: <a href="mailto:BCmB3zph5YmuC8oz@58.88.13.13">BCmB3zph5YmuC8oz@58.88.13.13</a>.<br>CSeq: 2 INVITE.<br>Server: MERA MSIP v.1.0.2.<br>Contact: &lt;sip:9128222570841@52.132.36.43:5060&gt;.<br>Content-Type: application/sdp.
<br>Via: SIP/2.0/UDP <a href="http://54.15.32.44:5060">54.15.32.44:5060</a>;branch=z9hG4bKa124.220e0023.0,SIP/2.0/UDP <a href="http://58.88.13.13:5060">58.88.13.13:5060</a>;branch=z9hG4bKI7LP7qhgGKFHt904;rport=5060.<br>Content-Length: 136.
<br>.<br>v=0.<br>o=- 1165483501 1165483501 IN IP4 <a href="http://52.132.36.43">52.132.36.43</a>.<br>s=-.<br>c=IN IP4 <a href="http://52.132.36.43">52.132.36.43</a>.<br>t=0 0.<br>m=audio 37548 RTP/AVP 4.<br>a=rtpmap:4 G723/8000.
<br>.<br><br>#<br>U Openser -&gt; IP Phone<br>SIP/2.0 200 OK.<br>Record-Route: &lt;sip:<a href="http://52.132.36.43:5060">52.132.36.43:5060</a>;lr&gt;,&lt;sip:<a href="http://54.15.32.44">54.15.32.44</a>;lr=on;ftag=1pRGOP6lOmlBFIxy&gt;.
<br>From: &quot;561705239298&quot; &lt;<a href="mailto:sip:561705239298@54.15.32.44">sip:561705239298@54.15.32.44</a>&gt;;tag=1pRGOP6lOmlBFIxy.<br>To: &quot;9128222570841&quot; &lt;<a href="mailto:sip:9128222570841@54.15.32.44">
sip:9128222570841@54.15.32.44</a>&gt;;tag=ffff1200ffff7710ff00000f1f6fff3b.<br>Call-ID: <a href="mailto:BCmB3zph5YmuC8oz@58.88.13.13">BCmB3zph5YmuC8oz@58.88.13.13</a>.<br>CSeq: 2 INVITE.<br>Server: MERA MSIP v.1.0.2.<br>Contact: &lt;
sip:9128222570841@52.132.36.43:5060;nat=yes&gt;.<br>Content-Type: application/sdp.<br>Via: SIP/2.0/UDP <a href="http://58.88.13.13:5060">58.88.13.13:5060</a>;branch=z9hG4bKI7LP7qhgGKFHt904;rport=5060.<br>Content-Length: 153.
<br>.<br>v=0.<br>o=- 1165483501 1165483501 IN IP4 <a href="http://52.132.36.43">52.132.36.43</a>.<br>s=-.<br>c=IN IP4 <a href="http://54.15.32.44">54.15.32.44</a>.<br>t=0 0.<br>m=audio 39784 RTP/AVP 4.<br>a=rtpmap:4 G723/8000.
<br>.<br>a=nortpproxy:yes.<br><br>#<br>U Openser -&gt; Mera<br>CANCEL sip:9128222570841@52.132.36.43:5060 SIP/2.0.<br>Via: SIP/2.0/UDP <a href="http://54.15.32.44">54.15.32.44</a>;branch=z9hG4bKa124.220e0023.1.<br>From: &quot;561705239298&quot; &lt;
<a href="mailto:sip:561705239298@54.15.32.44">sip:561705239298@54.15.32.44</a>&gt;;tag=1pRGOP6lOmlBFIxy.<br>Call-ID: <a href="mailto:BCmB3zph5YmuC8oz@58.88.13.13">BCmB3zph5YmuC8oz@58.88.13.13</a>.<br>To: &quot;9128222570841&quot; &lt;
<a href="mailto:sip:9128222570841@54.15.32.44">sip:9128222570841@54.15.32.44</a>&gt;.<br>CSeq: 2 CANCEL.<br>User-Agent: openser (1.1.0 (i386/linux)).<br>Content-Length: 0.<br>.<br><br>#<br>U Mera -&gt; Openser<br>SIP/2.0 200 OK.
<br>Via: SIP/2.0/UDP <a href="http://54.15.32.44">54.15.32.44</a>;branch=z9hG4bKa124.220e0023.1.<br>From: &quot;561705239298&quot; &lt;<a href="mailto:sip:561705239298@54.15.32.44">sip:561705239298@54.15.32.44</a>&gt;;tag=1pRGOP6lOmlBFIxy.
<br>Call-ID: <a href="mailto:BCmB3zph5YmuC8oz@58.88.13.13">BCmB3zph5YmuC8oz@58.88.13.13</a>.<br>To: &quot;9128222570841&quot; &lt;<a href="mailto:sip:9128222570841@54.15.32.44">sip:9128222570841@54.15.32.44</a>&gt;.<br>CSeq: 2 CANCEL.
<br>Content-Length: 0.<br>.<br><br>#<br>U Mera -&gt; Openser<br>SIP/2.0 487 Request Terminated.<br>Via: SIP/2.0/UDP <a href="http://54.15.32.44">54.15.32.44</a>;branch=z9hG4bKa124.220e0023.1.<br>From: &quot;561705239298&quot; &lt;
<a href="mailto:sip:561705239298@54.15.32.44">sip:561705239298@54.15.32.44</a>&gt;;tag=1pRGOP6lOmlBFIxy.<br>Call-ID: <a href="mailto:BCmB3zph5YmuC8oz@58.88.13.13">BCmB3zph5YmuC8oz@58.88.13.13</a>.<br>To: &quot;9128222570841&quot; &lt;
<a href="mailto:sip:9128222570841@54.15.32.44">sip:9128222570841@54.15.32.44</a>&gt;.<br>CSeq: 2 INVITE.<br>Content-Length: 0.<br>.<br><br>#<br>U Openser -&gt; Mera<br>ACK sip:9128222570841@52.132.36.43:5060 SIP/2.0.<br>Via: SIP/2.0/UDP 
<a href="http://54.15.32.44">54.15.32.44</a>;branch=z9hG4bKa124.220e0023.1.<br>From: &quot;561705239298&quot; &lt;<a href="mailto:sip:561705239298@54.15.32.44">sip:561705239298@54.15.32.44</a>&gt;;tag=1pRGOP6lOmlBFIxy.<br>
Call-ID: <a href="mailto:BCmB3zph5YmuC8oz@58.88.13.13">BCmB3zph5YmuC8oz@58.88.13.13</a>.<br>To: &quot;9128222570841&quot; &lt;<a href="mailto:sip:9128222570841@54.15.32.44">sip:9128222570841@54.15.32.44</a>&gt;.<br>CSeq: 2 ACK.
<br>User-Agent: openser (1.1.0 (i386/linux)).<br>Content-Length: 0.<br>.<br><br><br>#<br>U IP Phone -&gt; Openser<br>ACK sip:9128222570841@52.132.36.43:5060 SIP/2.0.<br>Via: SIP/2.0/UDP <a href="http://58.88.13.13:5060">58.88.13.13:5060
</a>;branch=z9hG4bKTpMoqwSSNb4LvZrv;rport.<br>Route: &lt;sip:<a href="http://54.15.32.44">54.15.32.44</a>;lr=on;ftag=1pRGOP6lOmlBFIxy&gt;, &lt;sip:<a href="http://52.132.36.43:5060">52.132.36.43:5060</a>;lr&gt;.<br>Max-Forwards: 70.
<br>User-Agent: PA168S V1.55.013 CFG0 .<br>From: &quot;561705239298&quot; &lt;<a href="mailto:sip:561705239298@54.15.32.44">sip:561705239298@54.15.32.44</a>&gt;;tag=1pRGOP6lOmlBFIxy.<br>To: &quot;9128222570841&quot; &lt;<a href="mailto:sip:9128222570841@54.15.32.44">
sip:9128222570841@54.15.32.44</a>&gt;;tag=ffff1200ffff7710ff00000f1f6fff3b.<br>Call-ID: <a href="mailto:BCmB3zph5YmuC8oz@58.88.13.13">BCmB3zph5YmuC8oz@58.88.13.13</a>.<br>Contact: &lt;sip:561705239298@58.88.13.13:5060&gt;.
<br>Authorization: Digest username=&quot;561705239298&quot;, realm=&quot;<a href="http://54.15.32.44">54.15.32.44</a>&quot;, nonce=&quot;4577de9a6e32a8fafc108687cbc9b520cfd2b1ea&quot;, uri=&quot;sip:9128222570841@52.132.36.43
:5060&quot;, response=&quot;7b312414aa7de3f999f8fd4a2a81c8a5&quot;, algorithm=MD5.<br>CSeq: 2 ACK.<br>Content-Length: 0.<br>.<br><br>#<br>U Openser -&gt; Mera<br>ACK sip:9128222570841@52.132.36.43:5060 SIP/2.0.<br>Record-Route: &lt;sip:
<a href="http://54.15.32.44">54.15.32.44</a>;lr=on;ftag=1pRGOP6lOmlBFIxy&gt;.<br>Via: SIP/2.0/UDP <a href="http://54.15.32.44">54.15.32.44</a>;branch=z9hG4bKa124.220e0023.3.<br>Via: SIP/2.0/UDP <a href="http://58.88.13.13:5060">
58.88.13.13:5060</a>;branch=z9hG4bKTpMoqwSSNb4LvZrv;rport=5060.<br>Route: &lt;sip:<a href="http://52.132.36.43:5060">52.132.36.43:5060</a>;lr&gt;.<br>Max-Forwards: 69.<br>User-Agent: PA168S V1.55.013 CFG0 .<br>From: &quot;561705239298&quot; &lt;
<a href="mailto:sip:561705239298@54.15.32.44">sip:561705239298@54.15.32.44</a>&gt;;tag=1pRGOP6lOmlBFIxy.<br>To: &quot;9128222570841&quot; &lt;<a href="mailto:sip:9128222570841@54.15.32.44">sip:9128222570841@54.15.32.44</a>
&gt;;tag=ffff1200ffff7710ff00000f1f6fff3b.<br>Call-ID: <a href="mailto:BCmB3zph5YmuC8oz@58.88.13.13">BCmB3zph5YmuC8oz@58.88.13.13</a>.<br>Contact: &lt;sip:561705239298@58.88.13.13:5060&gt;.<br>Authorization: Digest username=&quot;561705239298&quot;, realm=&quot;
<a href="http://54.15.32.44">54.15.32.44</a>&quot;, nonce=&quot;4577de9a6e32a8fafc108687cbc9b520cfd2b1ea&quot;, uri=&quot;sip:9128222570841@52.132.36.43:5060&quot;, response=&quot;7b312414aa7de3f999f8fd4a2a81c8a5&quot;, algorithm=MD5.
<br>CSeq: 2 ACK.<br>Content-Length: 0.<br>P-hint: rr-enforced.<br>.<br><br><br><br><br><br><br>