My guess is that the Internet outages are related to it.
A guess.
Telephone services have been data linked since the 80s, so this is almost no surprise.
But I can’t remember anything like this before.
Guess they’re super concentrated. There must be some central 911 control center.
BTW, the British linked their EAS to the phone system in the 1960’s so I guess this kind of stuff is all super tied together now.