I don't understand this 911 business about.
It is required by LAW at least in California that
The Copper line, land line, POTS...
MUST provide 911 service
Yes, there is no dial tone, but if you dial 911 and it will work.
Please DO NOT test it, unless you need 911 service.
This is why post paid services are so expensive, because we are subsidize all the expensive 911 service copper lines.
This is also why you DO NOT convert your copper line to fiber.
You can add fiber, but MUST keep the copper line for 911.
Years ago, I read some articles that some phone companies even put gel wall phone jacks in all the flood possible areas. So people can still make 911 calls under water.
My point is copper/land line is still the best/last option for 911 service.