With what energy the lights,mic & speaker of de telephone work?????

Question

am talking about de normal battery-less telephone.........if it is electricity den y de telephone work even wen der is a power cut

Answer 1

there is a low electrical current running through the telephone lines and yes if the power is out a normal wall mount telephone should still work.

Answer 2

an ideal telephone line volt could be around 45 volt. When ringing the line use AC 100 V. The power is separate from ur normal electricity supply. Therefore even there is the power cut, you can still use telephone as long as your local telephone exchange has power. They may use back up power in case of power cut.