[outages] [EXTERNAL] Re: IPAWS/FEMA National Test - VoWIFI

[Wilson, Butch]

I had wondered about the delays yesterday. One of my user's phones went off
almost two hours after the window.

Butch Wilson
Dir. of Instructional Technology
Mt. Vernon Township High School
Google Education Trainer (GET)
MCSE/MCSA/Security+
https://about.me/butch_wilson


On Wed, Oct 4, 2023 at 6:10 PM Chapman, Brad (NBCUniversal) via Outages <
outages at outages.org> wrote:

> Are these alerts queued up for later delivery if a device is off-line, out
> of range, or connected to a Wi-Fi calling network (where these types of
> cellular signals are not relayed?)
>
> If so, how long are they stored before being purged from the system?  1
> hour?  24 hours?
>
> -Brad
>
> —Sent from my iPhone
>
> > On Oct 4, 2023, at 2:14 PM, Jay R. Ashworth via Outages <
> outages at outages.org> wrote:
> >
> > ----- Original Message -----
> >> From: "Jay R. Ashworth via Outages" <outages at outages.org>
> >
> >> I could be unsurprised to find that the carrier VoWIFI proxies missed
> out on
> >> proxying SMS Cell Broadcast, which I gather provides the underlying PHY
> for
> >> CMAS.
> >
> > I have now an authoritative report that no, the carrier WIFI proxies --
> > carrying your voice calls to your carrier over someone else's wifi and
> the
> > Internet, to be clear -- does *not* proxy the cellular control channel
> > necessary to make CMAS/WEA work, and those alerts can be expected NOT to
> > arrive if your phone is on WIFI only or out of all range of ANY
> carrier's
> > towers.
> >
> > The only reports I'm still looking for are ones from people who are sure
> their
> > phone was set to WIFI-only, and was out of range of cell coverage, and
> still
> > got the national test alert, today at 1418EDT.
> >
> > Thanks,
> > -- jra
> > --
> > Jay R. Ashworth                  Baylink
> jra at baylink.com
> > Designer                     The Things I Think
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