911 Service and VoIP

[Luke-Jr]

On Friday 25 November 2005 20:19, you wrote:
> On 11/24/05, Luke-Jr <luke at dashjr.org> wrote:
> > > asterix
> > > box set up to recognize when you are calling 911 and play the location
> > > when ever it detects dtmcf for 911 whizzing by -- right?
> >
> > Whizzing by? Asterisk is the one parsing 911 and making the call...
>
> Ah -- so there's a central voip line for 911?  911 voip dispatch?
> it seems the protocol for identifying location would be an open
> thing, making the location recording redundant. -- a well defined
> out of band channel would carry the info.  Is 911 routing
> standardized from SIP or is it per-provider?  that is, do fwd and
> braodvoice and whatnot all do it the same?

1. I dial 911 on my phone
2. Asterisk parses 911 and looks up the extension for it
3. Asterisk connects to VoipJet to dial 18165551212
4. (optional) Asterisk plays pre-recorded location message
5. Asterisk connects the two phone channels