How our telephones are working?

Question

not many specialized details, please :)

Answer 1

They are connected via unground cables which stretch up till the power supply building. From there, the telephone cables transmit the radioactive waves to the receiver

Answer 2

* A switch to connect and disconnect the phone from the network - This switch is generally called the hook switch. It connects when you lift the handset.

    * A speaker - This is generally a little 50-cent, 8-ohm speaker of some sort.

    * A microphone - In the past, telephone microphones have been as simple as carbon granules compressed between two thin metal plates. Sound waves from your voice compress and decompress the granules, changing the resistance of the granules and modulating the current flowing through the microphone.