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

Wed Oct 4 19:09:58 EDT 2023

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
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