This may be a stupid question, but I know absolutely nothing about mobile: I'm deep inside an apartment building, and there are no windows on the lower level. How does my phone know where I am?
I've heard much about deducing it through WiFi and/or Bluetooth, but how? -- Alex On Thu, May 14, 2020 at 01:27:05PM -0700, Carlos Alvarez wrote: > 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 > >> > > > _______________________________________________ > VoiceOps mailing list > [email protected] > https://puck.nether.net/mailman/listinfo/voiceops -- Alex Balashov | Principal | Evariste Systems LLC Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free) Web: http://www.evaristesys.com/, http://www.csrpswitch.com/ _______________________________________________ VoiceOps mailing list [email protected] https://puck.nether.net/mailman/listinfo/voiceops
