A telephone system works by converting the sound of your voice into an electronic signal that can be transmitted over a phone line. This signal is then converted back into sound at the other end of the line. To make a call, your phone sends an electronic signal to the nearest telephone exchange. This exchange routes your call to the person you're trying to reach. The exchange also keeps track of how long each call lasts, so it can bill you for the time you've spent on the phone.

A telephone system works by converting sound waves into electrical signals that can be transmitted over a distance. The phone transmitter converts the sound waves into electrical signals and sends them through the phone lines to the phone receiver. The phone receiver converts the electrical signals back into sound waves and plays them through the speaker.