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<p>Hi Giovanni,</p>
<p>Although I'm not claiming to be an expert at all in isup-sip
interworking, the ITU Q.1912.5 document seems to say that it is
not necessary to encapsulate REL in CANCEL. You can take a look at
the example in Figure III.13/Q.1912.5 from Appendix III section of
the document.</p>
<p>Regards,<br>
</p>
<pre class="moz-signature" cols="72">Vlad Patrascu
OpenSIPS Developer
<a class="moz-txt-link-freetext" href="http://www.opensips-solutions.com">http://www.opensips-solutions.com</a></pre>
<div class="moz-cite-prefix">On 12/07/2018 07:18 PM, Giovanni
Maruzzelli wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CALXCt0p6WwRQ6cdKB-RwyOJthg3o8wkrMw6cfzhRaXp4OEvKJQ@mail.gmail.com">
<div dir="ltr">On Fri, Dec 7, 2018 at 6:14 PM Bogdan-Andrei Iancu
<<a href="mailto:bogdan@opensips.org" moz-do-not-send="true">bogdan@opensips.org</a>>
wrote:<br>
<div class="gmail_quote">
<blockquote class="gmail_quote" style="margin:0px 0px 0px
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<div bgcolor="#FFFFFF"> <tt>Hi Giovanni,<br>
<br>
The CANCEL is hop-by-hop, which means each SIP hop will
generate a completely new CANCEL (to be sent further) -
there is not proxying, so the changes you do over the
incoming CANCEL will not propagate into the outgoing
CANCEL.<br>
</tt></div>
</blockquote>
<div><br>
</div>
<div>Ciao Bogdan,</div>
<div><br>
</div>
<div>yep, saw that<br>
</div>
<div> </div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
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<div bgcolor="#FFFFFF"><tt> <br>
I cannot recall it, but is there a standard case of
pushing ISUP into CANCEL ?<br>
<br>
</tt></div>
</blockquote>
<div><br>
</div>
<div>Not sure at all, I am looking around in various (too
much) documentation around the intertube, not yet sure if
you must put isup REL into CANCEL or not...<br>
</div>
<div><br>
</div>
<div>Have a nice wend!<br>
</div>
<div>-giovanni<br>
</div>
<div> <br>
</div>
</div>
-- <br>
<div dir="ltr" class="gmail_signature"
data-smartmail="gmail_signature">Sincerely,<br>
<br>
Giovanni Maruzzelli<br>
OpenTelecom.IT<br>
cell: +39 347 266 56 18<br>
<br>
</div>
</div>
<br>
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