Re: Oh well
I highly encourage people to read "Living without electricity – one city’s experience coping with the loss of power (PDF) from Lancaster University, reporting on the 4-day power outage in December 2015, especially the "Communications" section, excerpted here:
"The wired telephone system, powered from batteries in the exchange, continued to operate over most of Lancaster. ... Many people who had replaced wired handsets with wireless discovered that these do not work without a mains supply.
Mobile phone systems did not hold up. ... Some have a battery back-up that continues to provide a service for an hour or two but few, if any, cope with the 30-hour loss
Most domestic internet connections were also lost.
The loss of communication services was one of the most significant problems reported by many people.
I have VoIP service, but I also still have POTS, and I still have one old wired handset plugged into a socket, just in case.