Re: One advantage of copper ...
" included a battery in the box on the customer's wall to power a conventional telephone in the advent of a power cut."
A battery you're likely to find is dead when you need it.
"The problem is so few people (even those without mobiles) use conventional phones that can be powered by the copper telephone network"
I assume you mean almost everybody has a DECT phone. That doesn't preclude having a POTS phone plugged in as well.
Biting the hand that feeds IT
