<div dir="ltr"><div class="gmail_quote"><div dir="ltr"><div class="m_1852765546755814507gmail-gE m_1852765546755814507gmail-iv m_1852765546755814507gmail-gt" style="padding:20px 0px 0px;font-size:12.8px;font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif">Hi all,</div><div class="m_1852765546755814507gmail-" style="font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:medium"><div id="m_1852765546755814507gmail-:t3" class="m_1852765546755814507gmail-ii m_1852765546755814507gmail-gt m_1852765546755814507gmail-adO" style="font-size:12.8px;direction:ltr;margin:8px 0px 0px;padding:0px"><div id="m_1852765546755814507gmail-:t4" class="m_1852765546755814507gmail-a3s m_1852765546755814507gmail-aXjCH" style="overflow:hidden;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:small;line-height:1.5;font-family:Arial,Helvetica,sans-serif"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div><br></div><div>I am trying to implement pre-alerting announcement by modifying the prepaid B2B UA scenario.</div><div><br></div><div>If I am not mistaken the default prepaid B2B UA scenario looks as below:</div><div><div><br></div><div><font face="monospace, monospace"><br></font></div><div><font face="monospace, monospace"> A Party OpenSIPS MS B Party</font></div><div><font face="monospace, monospace">1. ----Dialog1:INV+SDP(offer)---></font></div><div><font face="monospace, monospace">2. ----Dialog2:INV+SDP(offer)----></font></div><div><font face="monospace, monospace">3. <----Dialog2:200+SDP(answer)--- </font></div><div><font face="monospace, monospace">------------------------------- Bridging -------------------------------------</font></div><div><font face="monospace, monospace">4. <----Dialog1:200+SDP(answer)--- </font></div><div><font face="monospace, monospace">5. ----Dialog1:ACK---------------></font></div><div><font face="monospace, monospace">6. ----Dialog1:ACK--------------> </font></div><div><font face="monospace, monospace">------------------------------- Announcement ---------------------------------</font></div><div><font face="monospace, monospace">7. <----Dialog2:BYE--------------- </font></div><div><font face="monospace, monospace">8. -------------------Dialog3:INV+SDP(offer)--></font></div><div><font face="monospace, monospace">9. <------------------Dialog3:180 -------------</font></div><div><font face="monospace, monospace">10 <------------------Dialog3:200 -------------</font></div><div><font face="monospace, monospace">11 -------------------ACK--------------------> </font></div><div><font face="monospace, monospace">------------------------------- Bridging -------------------------------------</font></div></div><div><br></div><div><br></div><div>I am having problems with this behavior because in the prepaid scenario, the opensips B2B UA will create a leg to B party only after it has received a BYE from the MS. This means that there has to be a 200 OK before that which needs to reach the A party and establish media.</div><div>The behavior I am aiming for is for the MS to deliver an provisional response with SDP (183) to A Party and play the announcement. However, after an 183, I cannot terminate the call from the MS with a BYE and also, I do not want to generate a 200 OK. But I could generate an error on the MS (say an 4xx error).</div><div>So, the question is, can the scenario xml rules be formulated to make the B2B UA act on negative response? Is the below possible?</div><div><br></div><div><pre style="white-space:pre-wrap;font-size:0.9em;font-family:"Lucida Console","Andale Mono","Courier New",Courier;margin-top:0px;margin-bottom:0px"><span style="color:rgb(102,102,0)"><</span><span style="color:rgb(0,0,136)">rules</span><span style="color:rgb(102,102,0)">></span><span style="color:rgb(0,0,0)"><br><br></span></pre><pre style="white-space:pre-wrap;font-size:0.9em;font-family:"Lucida Console","Andale Mono","Courier New",Courier;margin-top:0px;margin-bottom:0px"><span style="color:rgb(0,0,0)"> </span><span style="color:rgb(102,102,0)"><</span><span style="color:rgb(0,0,136)">reply</span><span style="color:rgb(102,102,0)">></span><span style="color:rgb(0,0,0)"><br> </span><span style="color:rgb(102,102,0)"><</span><font color="#000088">negative</font><span style="color:rgb(102,102,0)">> or</span> <<font color="#000088">410</font><span style="font-size:0.9em;color:rgb(102,102,0)">></span><span style="color:rgb(102,102,0)"><br></span>
<span style="color:rgb(0,0,0)"> </span><span style="color:rgb(102,102,0)"><</span><span style="color:rgb(0,0,136)">rule</span><span style="color:rgb(0,0,0)"> </span><span style="color:rgb(102,0,102)">id</span><span style="color:rgb(102,102,0)">=</span><span style="color:rgb(0,0,0)"> ”</span><span style="color:rgb(102,0,102)">1</span><span style="color:rgb(0,0,0)">”</span><span style="color:rgb(102,102,0)">></span><span style="color:rgb(0,0,0)"><br> ...<br> </span><span style="color:rgb(102,102,0)"></</span><span style="color:rgb(0,0,136)">rule</span><span style="color:rgb(102,102,0)">></span><span style="color:rgb(0,0,0)"><br></span><pre style="white-space:pre-wrap;font-size:0.9em;font-family:"Lucida Console","Andale Mono","Courier New",Courier;margin-top:0px;margin-bottom:0px"><span style="color:rgb(0,0,0)"> </span><span style="color:rgb(102,102,0)"></</span><font color="#000088">negative</font><span style="color:rgb(102,102,0)">> or</span> </<font color="#000088">410</font><span style="font-size:0.9em;color:rgb(102,102,0)">></span></pre><span style="color:rgb(0,0,0)"> </span><span style="color:rgb(102,102,0)"></</span><span style="color:rgb(0,0,136)">reply</span><span style="color:rgb(102,102,0)">></span><span style="color:rgb(0,0,0)"><br></span><span style="color:rgb(102,102,0)"></</span><span style="color:rgb(0,0,136)">rules</span><span style="color:rgb(102,102,0)">></span></pre></div><div><br></div><div>If not, is there any other way to do this?</div><div><br></div><div>Regards,</div><div>Ano</div></div></div></div></div></div></div></div>
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