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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Excellent stuff Anthony! </span><span style='font-size:11.0pt;
font-family:Wingdings;color:#1F497D'>J</span><span style='font-size:11.0pt;
font-family:"Calibri","sans-serif";color:#1F497D'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>SIP over SMTP could actually be useful in a push-to-talk type of
scenario. Put the voice packets in an attachment. A slight delay, perhaps, but nicely
encapsulated in a totally standard protocol.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
freeswitch-users-bounces@lists.freeswitch.org [mailto:freeswitch-users-bounces@lists.freeswitch.org]
<b>On Behalf Of </b>Nik Middleton<br>
<b>Sent:</b> Wednesday, April 01, 2009 12:08 PM<br>
<b>To:</b> freeswitch-users@lists.freeswitch.org<br>
<b>Subject:</b> Re: [Freeswitch-users] Another FreeSWITCH First!<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>Well you almost had me there, but SIP over SMTP? That was too
much. <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>Regards,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'><o:p> </o:p></span></p>
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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
freeswitch-users-bounces@lists.freeswitch.org
[mailto:freeswitch-users-bounces@lists.freeswitch.org] <b>On Behalf Of </b>Anthony
Minessale<br>
<b>Sent:</b> 01 April 2009 16:31<br>
<b>To:</b> Freeswitch-users<br>
<b>Subject:</b> [Freeswitch-users] Another FreeSWITCH First!</span><o:p></o:p></p>
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<p class=MsoNormal><o:p> </o:p></p>
<p>The FreeSWITCH team is excited to announce that FreeSWITCH is the first
telephony application to support the new SIP 4.1 protocol specification.<o:p></o:p></p>
<p>Unlike its predecessors, SIP 4.1 has been created with the collaboration of
both the jabber foundation and the IETF. With this match made in heaven,
one can now encapsulate an xml representation of a sip message, which in turn
can encapsulate a standard SIP 2.0 message making it possible to do more than
ever before.<br>
Other exciting features include: <o:p></o:p></p>
<p>*) RFC 4109 support: (SIP over SMTP), allowing packets to traverse NAT with
ease. <o:p></o:p></p>
<p>*) Full circle presence: endpoints must subscribe to each character in the
printable ASCII range that may be used to indicate presence and the server will
send an xml notification to the client for each character that is enabled
whenever a call takes place which in turn can be used to build a SIP 4.1 FYI
packet that can be sent to all the neighboring SIP devices so they may send
themselves a NOTIFY telling them that the light should blink if the same packet
happens to be sent from a neighbor. Then when the neighbor wants to send
a presence packet it establishes a dialog with the Third Party Presence Agent
TPPA and leaves the message there. Then it sends the server a PRESENCE
packet, which is then, relayed to the subscribers with the TPPA id so all the
subscribers can connect to the TPPA server to make the little light blink. <o:p></o:p></p>
<p>*) Retirement of SDP: SDP is deprecated in favor of a list of
URL’s describing the desired codec. The UA can then request this
URL and get the full details of the media requirements. The media port is
negotiated through trial and error where the calling UA asks the called UA if
the port it has guessed randomly is correct via direct TCP connection and an
exchange of XML PORT MARKUP LANGUGE XPML<o:p></o:p></p>
<p>INVITE <a href="mailto:bob@alice.com">bob@alice.com</a> SIP 4.1<br>
Content-type: sip-xml-encapsulated<br>
<SIP version=”4.1”><br>
<content type=”SIP-INVITE”><br>
<INVITE recipient=”<a
href="mailto:bob@alice.com">bob@alice.com</a>”><br>
<data type=”sip-2/0”/><br>
<![CDATA[INVITE <a
href="mailto:bob@alice.com">bob@alice.com</a> SIP 2.0<br>
To: <a href="mailto:bob@alice.com">bob@alice.com</a><br>
From: <a href="mailto:alice@bob.com">alice@bob.com</a><br>
Subject: SIP Rocks<br>
]]><br>
</data><br>
</INVITE><br>
</content> <br>
</SIP> <o:p></o:p></p>
<p class=MsoNormal><br clear=all>
<br>
-- <br>
Anthony Minessale II<br>
<br>
FreeSWITCH <a href="http://www.freeswitch.org/">http://www.freeswitch.org/</a><br>
ClueCon <a href="http://www.cluecon.com/">http://www.cluecon.com/</a><br>
<br>
AIM: anthm<br>
<a href="mailto:MSN%3Aanthony_minessale@hotmail.com">MSN:anthony_minessale@hotmail.com</a><br>
GTALK/JABBER/<a href="mailto:PAYPAL%3Aanthony.minessale@gmail.com">PAYPAL:anthony.minessale@gmail.com</a><br>
IRC: <a href="http://irc.freenode.net">irc.freenode.net</a> #freeswitch<br>
<br>
FreeSWITCH Developer Conference<br>
<a href="mailto:sip%3A888@conference.freeswitch.org">sip:888@conference.freeswitch.org</a><br>
<a href="http://iax:guest@conference.freeswitch.org/888">iax:guest@conference.freeswitch.org/888</a><br>
<a href="mailto:googletalk%3Aconf%2B888@conference.freeswitch.org">googletalk:conf+888@conference.freeswitch.org</a><br>
pstn:213-799-1400<o:p></o:p></p>
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