Three meters is three floors of resolution, depending on whether the person is standing or laying on the ground.
On Mon, Sep 27, 2021 at 1:34 PM Mark Lindsey <lind...@e-c-group.com> wrote: > In the top 25 cellular market areas, nationwide cell phone providers are > already required to provide Z-axis (elevation) data within 3 meters for 80% > of calls [for compatible devices]. The requirements increase each year; by > 2026, *all* cellular providers are required to provide z-axis precision > for dispatchable location of +/- 3 meters everywhere in the US. > > This is all in addition to providing +/- 50 meter horizontal (x, y axis, > also known as latitude and longitude) precision for 911 calls. > > > https://www.fcc.gov/public-safety-and-homeland-security/policy-and-licensing-division/911-services/general/location-accuracy-indoor-benchmarks > > > *Mark R Lindsey, SMTS* | +1-229-316-0013 | m...@ecg.co |* > https://ecg.co/lindsey/ > <https://ecg.co/lindsey/>* > > > > > > > > > On Sep 27, 2021, at 4:07 PM, Carlos Alvarez <caalva...@gmail.com> wrote: > > They probably don't, and I don't think they are covered by the same > law/requirements. Also, they have far more schills(COUGH) I mean lobbyists > in congress. > > FLOOR could be determined by AP lists, probably. Maybe. Specific office > seems impossible currently. > > > On Mon, Sep 27, 2021 at 1:05 PM Alex Balashov via VoiceOps < > voiceops@voiceops.org> wrote: > >> And how do the cell phone operators know what floor you’re on? >> >> — >> Sent from mobile, with due apologies for brevity and errors. >> >> On Sep 27, 2021, at 3:49 PM, Carlos Alvarez <caalva...@gmail.com> wrote: >> >> >> It used to be, then the whole Ray Baum thing, and now it's not. Short >> story: 911 call failed to identify the specific floor/office, person >> died. Now you have to provide enough info for a first responder to reach a >> person without help, which also means opening main doors if needed. >> There's simply no way that a laptop will give that specificity. Will it be >> sufficient to say that they are near the AP on the third floor southwest >> corner? The letter of the law seems to say "no." >> >> >> >> On Mon, Sep 27, 2021 at 12:40 PM Alex Balashov via VoiceOps < >> voiceops@voiceops.org> wrote: >> >>> I wonder if doing GeoIP via a commercial database like MaxMind—and we >>> all know how perfect a location mechanism that is—could be construed as a >>> sufficient “best effort” in this case. >>> >>> > On Sep 27, 2021, at 3:28 PM, Carlos Alvarez <caalva...@gmail.com> >>> wrote: >>> > >>> > Ours doesn't, but that's a good idea to share with the vendor. But in >>> most cases, people are using the softphone on a laptop and there's no >>> native phone app, nor a GPS, nor any other location info other than >>> proximate wi-fi networks. >>> > >>> > I can see no feasible way to meet the letter of the law, and hate to >>> be depending on the good graces of a bureaucrat to know that it's an >>> impossible task. >>> >>> -- >>> 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 >>> VoiceOps@voiceops.org >>> https://puck.nether.net/mailman/listinfo/voiceops >>> >> _______________________________________________ >> VoiceOps mailing list >> VoiceOps@voiceops.org >> https://puck.nether.net/mailman/listinfo/voiceops >> >> _______________________________________________ >> VoiceOps mailing list >> VoiceOps@voiceops.org >> https://puck.nether.net/mailman/listinfo/voiceops >> > _______________________________________________ > VoiceOps mailing list > VoiceOps@voiceops.org > https://puck.nether.net/mailman/listinfo/voiceops > > >
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