How do phones work?

Question

How is it possible for so many people to communicate at once with such thin telephone lines?

Answer 1

Telephone is low voltage (only a few volts DC) with simple op amps to boost power at stragetic locations. It only takes 3or4 wires per line and these are bundled in tightly packed cable enclosures.

With fibre optics they are made even smaller in diameter so they can pack more lines together than with copper wire. Also the boosting of the signal isn't required or required as much.

It then goes to a switching station where your dedicated line is routed to generic, available lines that reach other switching stations and connect to a given dedicated line.

Some people still have to wait for available lines in some remote areas where there isn't enough population to warrant a new master cable and the capacity of the current one is at it limits.

Answer 2

Earl D has a genral ideal, but it only reuires 1 pair of wires, for a most phone lines. When you get into keysystems and PBXs they can require up to 25 pair. Most of these systems have gone away. Right now Im a little to lazy and go through and explain it all so here is a link that gives you the basics on how telephones work.

Answer 3

remember mobile phones does not use any kind of wires.

for more info. contact alex graham bell..

Answer 4

u dial a number and hit talk or send and it calls deh ## u entered

Answer 5

Most of the people talk about the same bull****......... :-)