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<div class="moz-cite-prefix"><tt>Hi Giuseppe,<br>
<br>
Do you see in your logs any entries for "</tt><tt>b2b_tm_cback"
when the 180 is processed ?<br>
<br>
Regards,<br>
</tt>
<pre class="moz-signature" cols="72">Bogdan-Andrei Iancu
OpenSIPS Founder and Developer
<a class="moz-txt-link-freetext" href="http://www.opensips-solutions.com">http://www.opensips-solutions.com</a></pre>
On 09.08.2014 19:39, Giuseppe Cardone wrote:<br>
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<div>Hi,<br>
<br>
</div>
I'm trying out the b2b module on opensips and have encountered
an issue regarding PRACK.<br>
<br>
</div>
<div>In particular I have a scenario where the called number
replies with a 183 session progress (Require: 100rel and RSeq:
1) and then a few seconds later with a 180 Ringing (Require:
100rel and RSeq: 2).<br>
<br>
</div>
<div>What happens is that opensips correctly replies with a
PRACK to the 183 response but then doesn't do the same when it
receives the 180 provisional response.<br>
<br>
</div>
<div>Excerpts from the logs show this happening when the 183
message is received:<br>
<br>
Aug 9 17:31:14 [2528] DBG:b2b_entities:b2b_tm_cback: Found
require hdr<br>
Aug 9 17:31:14 [2528] DBG:b2b_entities:b2b_tm_cback: Found
100rel header<br>
Aug 9 17:31:14 [2528] DBG:b2b_entities:b2b_send_req: start
type=1<br>
<br>
</div>
<div>but when the 180 response arrives, there are no similar
entries.<br>
<br>
It is my understanding that from a SIP signalling point of
view the b2b module should reply with a PRACK to the 180
response too or am I missing something ?<br>
<br>
</div>
<div>Any ideas as to why this may be happening or could it be a
bug ?<br>
<br>
</div>
<div>Many thanks,<br>
</div>
Giuseppe<br>
</div>
<br>
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