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<p class=MsoNormal>Dear Asterisk community!<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span lang=EN-US>I am having trouble with a project concerning
the 183 Session Progress SIP messages. Asterisk seems to only accept these when
there is also a Session Description (SDP) included in the message.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>I also verified this by looking at the
code.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>However for a project we are working with a
trunk to a third party system (Alcatel) and they are insisting that this
behavior is non-compliant with RFC3261 (SIP). So can someone please tell me the
reason,<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>why Asterisk does not support 183 messages
without SDP as this would really help me finding arguments in this situation. So
far Alcatel just tells us that this is not SIP-compliant and that we have to
change things<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>on the Asterisk side, but I’m not
quite sure that this is really the case and having arguments could help me
clarifying this situation.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Thanks in advance.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:black'>With best regards<br>
<br>
<b>Florian Floimair</b><br>
Technical Support<br>
<br>
<b>COMMEND INTERNATIONAL GMBH</b><br>
A-5020 Salzburg, Saalachstraße 51<br>
Tel: +43-662-85 62 25 312<br>
Sip: </span><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:black'><a
href="file:///T:\KAT\Signaturen\=%22sip:f.floimair@commend.com%22"><span
lang=EN-US style='color:blue'>f.floimair@commend.com</span></a></span><span
lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'><br>
Fax: +43-662-85 62 26<br>
</span><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:black'><a href="mailto:f.floimair@commend.com"><span lang=EN-US
style='color:blue'>f.floimair@commend.com</span></a></span><span lang=EN-US
style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'><br>
</span><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:black'><a href="http://www.commend.com/"><span lang=EN-US
style='color:blue'>http://www.commend.com</span></a></span><span lang=EN-US
style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'><br>
<br>
<b>Security and Communication by Commend</b><br>
<br>
</span><span lang=EN-US style='font-size:8.0pt;font-family:"Arial","sans-serif";
color:gray'>FN 178618z | LG Salzburg</span><span lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
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