<div dir="ltr"><br><div class="gmail_extra">Section 6.5.2 (v4 interface) of NENA's v2 Interim Voip Architecture Standard shows a ladder diagram of their SIP flow which seems to match standard SIP. Maybe I'm oversimplifying it?<br>
<br><br>[1] <a href="http://c.ymcdn.com/sites/www.nena.org/resource/collection/2851C951-69FF-40F0-A6B8-36A714CB085D/NENA_08-001-v2_Interim_VoIP_Architecture_i2.pdf">http://c.ymcdn.com/sites/www.nena.org/resource/collection/2851C951-69FF-40F0-A6B8-36A714CB085D/NENA_08-001-v2_Interim_VoIP_Architecture_i2.pdf</a><br>
<br><div class="gmail_quote">On Fri, Apr 19, 2013 at 2:51 PM, Terry Brummell <span dir="ltr"><<a href="mailto:terry@brummell.net" target="_blank">terry@brummell.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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<div dir="ltr"><font color="#000000" face="Arial">E911 does not follow the standard SIP RFC. That would be a good reason that they couldn't/wouldn't do it. Now that I say that I should qualify it and say "NG911 (or ESINet) does not follow SIP RFC" <a href="http://en.wikipedia.org/wiki/Next_Generation_9-1-1" target="_blank">http://en.wikipedia.org/wiki/Next_Generation_9-1-1</a>. That is not saying your county is not using standard SIP for E911, it just wouldn't be considered NG911.</font></div>
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<font face="Tahoma"><b>From:</b> Chris Nighswonger<br><b>Sent:</b> Fri 4/19/2013 11:41 AM<br><b>To:</b> Asterisk Users Mailing List - Non-Commercial Discussion<br><b>Subject:</b> [asterisk-users] E911 Voip Trunking<br></font><br>
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<div>During the course of a conversation with an member of the IT group who handles the E911 center for our county, I learned that all of the county's E911 is voip based. This got me to wondering why we could not just configure up a SIP or some such trunk directly to the E911 center to handle our emergency traffic. The county seems interested in exploring the possibility.<br>
<br></div>So I'm wondering if anyone else has attempted this.<br><br></div>Kind Regards,<br>Chris<br></div></div></div></div></div>
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