Hey Steve,<br><br>I know that Asterisk was used, we were once using it ourselves and had Digium produce a CAMA stack (as you noted, no great shakes, I think one guy did it in a weekend. It sure wasn't priced that way!). Do you know of anyone else using FS for E911? I'd be interested to speak to them. <br>
<br>I happen to have test equipment that we used when testing our Digium stuff, so that's no problem. As a matter of fact, I'm also looking to see if TDD has been adapted for FS. As I'm looking at solution possibilities, I don't want to re-invent the wheel if someone else has already been down this road.<br>
<br>Thanks for responding,<br><br>Mike G.<br><br><div class="gmail_quote">On Tue, Jan 24, 2012 at 11:19 PM, Steve Underwood <span dir="ltr"><<a href="mailto:steveu@coppice.org">steveu@coppice.org</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi,<br>
<br>
Freeswitch and Asterisk (probably Yate and others too) have been used<br>
for E911 services for some time, yet I haven't heard anyone ask for CAMA<br>
before. Its usually things like TDD for the deaf support they ask for.<br>
However, it appears CAMA is a popular choice for E911, as it overcomes<br>
limitations in the ISDN protocols for a service eager to know the<br>
origins of a dropped call.<br>
<br>
<a href="http://wholesale.att.com/reference_library/.../TR-73576.pdfseems" target="_blank">http://wholesale.att.com/reference_library/.../TR-73576.pdfseems</a> to be<br>
the relevant spec. Its basically a conventional Bell MF type T1, with a<br>
few modifications (or analogue pairs for smaller setups). It doesn't<br>
look like a big job to implement it, although finding suitable test beds<br>
might be a pain.<br>
<br>
Regards,<br>
Steve<br>
<div class="im"><br>
On 01/25/2012 03:19 AM, Michael Gende wrote:<br>
> Yes, that's the one. Not the entire protocol, just the subset used in<br>
> E9-1-1 (while it still is).<br>
><br>
> On Tue, Jan 24, 2012 at 10:31 AM, Moises Silva <<a href="mailto:moises.silva@gmail.com">moises.silva@gmail.com</a><br>
</div><div class="im">> <mailto:<a href="mailto:moises.silva@gmail.com">moises.silva@gmail.com</a>>> wrote:<br>
><br>
> On Mon, Jan 23, 2012 at 5:36 PM, Michael Gende<br>
</div><div class="im">> <<a href="mailto:mgende@gendesign.com">mgende@gendesign.com</a> <mailto:<a href="mailto:mgende@gendesign.com">mgende@gendesign.com</a>>> wrote:<br>
><br>
> I'm just starting a search on this subject, but does a stack<br>
> exist for FS implementing CAMA, or at least a subset of that<br>
> protocol?<br>
><br>
><br>
> Someone asked me about this a while ago, can't remember nor find<br>
> his name or email.<br>
><br>
> Just to confirm, are you talking about this?:<br>
> <a href="http://en.wikipedia.org/wiki/Automatic_message_accounting" target="_blank">http://en.wikipedia.org/wiki/Automatic_message_accounting</a><br>
><br>
> I don't think there is a stack or code to handle that in the open<br>
> source community (though, you never know what is out there). From<br>
> what I see requires MF tones, which at least spandsp is able to<br>
> generate and detect. Some logic is required on top to interpret<br>
> and respond to the tones accordingly.<br>
><br>
</div>> *Moises Silva<br>
> **/Software Engineer, Development Manager/***<br>
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><br>
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><br>
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