And they work when the power is out, so.......

If you have a land line
Not from the modem

I have two,
A 1939 Northern Bell
My grandfathers, the ringer shacks the house
A 1980's rotery wall mount with a 40 foot extension
to the handset that stays tangled and hangs on everything

Power goes off,
towers go down,
old school still works

Go Rams