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<font face="monospace">Hi Bela,<br>
<br>
What you are trying to do (messing with the TO-tags) is a bad
idea, as you will be breaking the upstream parallel forking.<br>
<br>
If the GW does not support forking, what you can do is to avoid
doing parallel forking in your cfg (like when routing to users via
lookup). You do not need any special support.<br>
<br>
Best regards,<br>
</font>
<pre class="moz-signature" cols="72">Bogdan-Andrei Iancu
OpenSIPS Founder and Developer
<a class="moz-txt-link-freetext" href="https://www.opensips-solutions.com">https://www.opensips-solutions.com</a>
OpenSIPS Summit 27-30 Sept 2022, Athens
<a class="moz-txt-link-freetext" href="https://www.opensips.org/events/Summit-2022Athens/">https://www.opensips.org/events/Summit-2022Athens/</a></pre>
<div class="moz-cite-prefix">On 9/29/22 7:10 AM, Bela H wrote:<br>
</div>
<blockquote type="cite"
cite="mid:SY4P282MB2252807F3482A406DA130F93C0579@SY4P282MB2252.AUSP282.PROD.OUTLOOK.COM">
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<p class="MsoNormal">Hello,</p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I have call forwarding busy/no answer
scenario: A number is from a gateway, B and C numbers are our
own subs.</p>
<p class="MsoNormal">The gateway is sending us the INVITE
message with “Request-Disposition: no-fork” header field.</p>
<p class="MsoNormal">That means we must use one dialog for the
mentioned scenario.</p>
<p class="MsoNormal">Currently the To tag we are sending to the
GW in the first 180 ringing/181 Call is being forwarded
messages are different to the To tag in the second 180 ringing
and 200 OK (SDP).</p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Gateway OpenSips</p>
<p class="MsoNormal"> INVITE</p>
<p class="MsoNormal">------------------------------------------></p>
<p class="MsoNormal"> </p>
<p class="MsoNormal" style="text-indent:36.0pt">100 GIVING IT A
TRY</p>
<p class="MsoNormal"><--
-----------------------------------------</p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"> 180 RINGING</p>
<p class="MsoNormal"><-
-------------------------------------------</p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">181 CALL IS BEING FORWARDED</p>
<p class="MsoNormal"><-
-------------------------------------------</p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"> 180 RINGING</p>
<p class="MsoNormal"><-
-------------------------------------------</p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"> 200 OK (SDP)</p>
<p class="MsoNormal"><-
-------------------------------------------</p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">What would be the easiest way from OpenSIPS
to send the same To tag (it should be the same from the first
180 ringing through to the 200 OK) and using one dialog for
this scenario?</p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Cheers,</p>
<p class="MsoNormal">Bela</p>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<br>
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</blockquote>
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