Telephone (in French: téléphone) or (in English: telephone) from Greek tele and phone is a telecommunication device that is used to transmit sound. Alexander Graham Bell invented the first telephone. The telephone made it possible to send and receive messages without the need for a table like Morse code. By using the telephone, people who are miles apart can talk to each other. Today, other signals such as Internet frequencies are also transmitted from telephone lines. Although, today, mobile phones are mostly used, which have many differences from the original type in terms of the mechanism of action.