GPS is useless inside most buildings. That's why mobiles have A-GPS, which is assisted by wifi and bluetooth. Even in homes, GPS signals are mostly blocked. In a commercial building, almost guaranteed to be blocked.
On Thu, May 14, 2020 at 1:23 PM Aaron C. de Bruyn <[email protected]> wrote: > I'm still wondering why desk phones don't have a small built-in GPS chip > yet? Soft phones on cell phones could have access to GPS. Web browsers > wouldn't work so well. > But having the phone out-of-band-signal the phone server with GPS info > (maybe a SIP header or something) would allow the phone server to use that > information for routing 911 calls. > It could even pass the info through directly to more 'advanced' 911 > centers. > > One possibility would be to go old-style and transmit the data in-band > over the voice circuit similar to modems or DSL. We're only talking a few > bytes for GPS coordinates, elevation, and accuracy information. Burst the > data at the beginning of the call, or every 30 seconds, etc... > > My motorola HT-1250 from two decades ago would transmit something like an > 8-character radio identifier when you keyed up. It only delayed the > conversation by a third of a second. > > Maybe the phone server could even add in some additional information (i.e. > "123 West Main St / 3rd Floor / Room 42"). > > -A > > On Thu, May 14, 2020 at 12:53 PM Carlos Alvarez <[email protected]> > wrote: > >> I *thought* I had read something about mobile apps being given a pass on >> 911, but not completely sure. And then where do we cross the line? Mobile >> app, tablet running a WebRTC softphone...etc... >> >> >> On Thu, May 14, 2020 at 12:41 PM Mike Hammett <[email protected]> >> wrote: >> >>> We're looking that we may have to allocate a lot more DIDs, simply for >>> the new 911 requirements. We have a lot of clients with work from home >>> people. Some have their own DIDs already, some don't. >>> >>> Softphones make this a lot more complicated. We could have the same >>> extension connected via desk phone, windows app, Chrome extension, phone >>> app, and tablet app. The desk phone is pretty easy. The mobile app? Yeah, >>> that's inherently much more difficult to manage. >>> >>> >>> I don't know. >>> >>> >>> >>> ----- >>> Mike Hammett >>> Intelligent Computing Solutions >>> http://www.ics-il.com >>> >>> >>> >>> Midwest Internet Exchange >>> http://www.midwest-ix.com >>> >>> >>> >>> ------------------------------ >>> *From: *"Mike Hammett" <[email protected]> >>> *To: *"Voiceops.org" <[email protected]> >>> *Sent: *Thursday, May 14, 2020 2:04:43 PM >>> *Subject: *[VoiceOps] Fwd: 911 and Softphones >>> >>> The pitfalls of having my email address mirror the mailing lists I'm on, >>> I get list submissions. :-) >>> >>> >>> >>> ----- >>> Mike Hammett >>> Intelligent Computing Solutions >>> http://www.ics-il.com >>> >>> >>> >>> Midwest Internet Exchange >>> http://www.midwest-ix.com >>> >>> >>> >>> ------------------------------ >>> *From: *"Christopher Aloi" <[email protected]> >>> *To: *[email protected] >>> *Sent: *Thursday, May 14, 2020 9:39:41 AM >>> *Subject: *911 and Softphones >>> >>> Hey All, >>> >>> With the recent migration to everyone working from home we are seeing a >>> huge increase in soft phone usage. How is everyone handling location >>> updates for 911 with soft phones? Our switch has the concept of sites and >>> users fall within a site but can also travel across sites. An out pulsed >>> number is bound to the site when 911 is dialed from within the site. We >>> are looking at building individual sites for each user so they can have a >>> dedicated unique outbound number only for 911. Does your company consider >>> a soft phone the same as a "hard" phone with regards to 911? From the >>> reading I have done I see no delineation between the two. Thanks, Chris >>> >>> >>> >>> >>> _______________________________________________ >>> VoiceOps mailing list >>> [email protected] >>> https://puck.nether.net/mailman/listinfo/voiceops >>> >>> _______________________________________________ >>> VoiceOps mailing list >>> [email protected] >>> https://puck.nether.net/mailman/listinfo/voiceops >>> >> _______________________________________________ >> VoiceOps mailing list >> [email protected] >> https://puck.nether.net/mailman/listinfo/voiceops >> >
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