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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Which version of asterisk are you using ?
<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> asterisk-users-bounces@lists.digium.com [mailto:asterisk-users-bounces@lists.digium.com]
<b>On Behalf Of </b>Mordechay Kaganer<br>
<b>Sent:</b> Sunday, August 11, 2013 8:59 AM<br>
<b>To:</b> Asterisk Users Mailing List - Non-Commercial Discussion<br>
<b>Subject:</b> [asterisk-users] SIP trunk and congestion handling<o:p></o:p></span></p>
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<p class="MsoNormal">B.H.<o:p></o:p></p>
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<p class="MsoNormal">Hello, all. We have a dialer software that runs outgoing telephony campaigns. We have been using it successfully with PRI cards, now we're evaluating it's use also with a SIP trunk. Most of the things run perfectly good without a need to
change anything except for dial string, but there's some strange problem with asterisk interpreting SIP result codes. <o:p></o:p></p>
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<p class="MsoNormal">Our software is written in Java using asterisk-java library. It is using Asterisk's reason code from OriginateResponseEvent to determine if it should redial the number. Our consideration is that if Asterisk returns reason code 8 (Congestion)
this means that the call has never actually reached the destination number, and it's OK to try to redial again.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">But with SIP trunk, many times i can see a really strange sequence of events:<o:p></o:p></p>
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<p class="MsoNormal">After INVITE i get the following responses (example from a real conversation)<o:p></o:p></p>
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<p class="MsoNormal">[17:01:40] SIP/2.0 100 Trying<o:p></o:p></p>
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<p class="MsoNormal">[17:01:40] SIP/2.0 183 Session Progress<o:p></o:p></p>
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<p class="MsoNormal">[17:01:51] SIP/2.0 480 Temporarily not available<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">As far as i understand, this means that the remote phone was ringing for 10 seconds and then the call failed due to a timeout. As far as i understand, i'm supposed to get reason code 3, but actually the java application gets OriginateResponseEvent
with failure reason code 8.<o:p></o:p></p>
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<p class="MsoNormal">This behavior is hard to reproduce. I was trying with my own phone number and then i get the expected reason code 3, but i constantly get this situation running our customer's campaigns.<o:p></o:p></p>
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<p class="MsoNormal">-- <o:p></o:p></p>
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<p class="MsoNormal" dir="RTL" style="text-align:right;direction:rtl;unicode-bidi:embed">
<span lang="HE" style="color:#666666">משיח </span><span dir="LTR" style="color:#666666">NOW</span><span dir="RTL"></span><span dir="RTL"></span><span lang="HE" style="color:#666666"><span dir="RTL"></span><span dir="RTL"></span>!</span><span dir="LTR"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:#666666">Moshiach is coming very soon, prepare yourself!</span><span lang="AR-SA" dir="RTL"><o:p></o:p></span></p>
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<p class="MsoNormal" dir="RTL" style="text-align:right;direction:rtl;unicode-bidi:embed">
<span lang="HE" style="color:#666666">יחי אדוננו מורינו ורבינו מלך המשיח לעולם ועד!</span><span dir="LTR"><o:p></o:p></span></p>
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