<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto">Kamailio should definitely not consider evolving “B2BUA support”. :-) 🍅 <br><br><div dir="ltr">—<div>Sent from mobile, with due apologies for brevity and errors.</div></div><div dir="ltr"><br><blockquote type="cite">On Apr 21, 2020, at 11:35 AM, Julien Chavanton <jchavanton@gmail.com> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div>The main gain in using a B2BUA is that you take responsibility for terminating the extra call legs, it is as good as your B2BUA will be, by delegating the responsibility upstream you can not always be sure it is handled properly.</div> <br><div>I wonder if Kamailio should consider evolving in B2BUA support.<br>I am expecting to receive tomatoes.<br></div><div><br></div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Apr 21, 2020 at 3:50 AM Nuno Ferreira <<a href="mailto:nferreira@fuze.com">nferreira@fuze.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div>Hi Alex,</div><div><br></div><div>Isn't the option of generating multiple call legs with a B2BUA more subject to dead air/ghost calls than letting kamailio handle parallel forking? </div><div><br></div><div>Nuno </div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Apr 21, 2020 at 12:06 AM Alex Balashov <<a href="mailto:abalashov@evaristesys.com" target="_blank">abalashov@evaristesys.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">It should be noted at a rather general level that parallel forking is<br>
replete with race conditions, and is a nasty and unwieldy aspect of SIP.<br>
<br>
The pain of using parallel forking to implement something like "ring<br>
groups", for example, is often not worth the savings in architectural<br>
complexity.<br>
<br>
If you have some other means of accomplishing what you want to<br>
accomplish, e.g. using a B2BUA to generate multiple independent call<br>
legs simultaneously ringing multiple destinations, I strongly advise you<br>
to go with that instead.<br>
<br>
-- Alex<br>
<br>
-- <br>
Alex Balashov | Principal | Evariste Systems LLC<br>
<br>
Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free)<br>
Web: <a href="http://www.evaristesys.com/" rel="noreferrer" target="_blank">http://www.evaristesys.com/</a>, <a href="http://www.csrpswitch.com/" rel="noreferrer" target="_blank">http://www.csrpswitch.com/</a><br>
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