A telephone is a telecommunications device that permits two or more users to conduct a conversation when they are too far apart
to be easily heard directly. A telephone converts sound, typically and most efficiently the human voice, into electronic signals
that are transmitted via cables and other communication channels to another telephone which reproduces the sound to the receiving
user. The term is derived from Greek: τῆλε (tēle, far) and φωνή (phōnē, voice), together meaning distant voice.
A common short form of the term is phone, which came into use early in the telephone's history
