report

Telephone

Telephone is an instrument that sends and receives voice messages, usually by means of electric current. It is one of our most valuable means of communication. In just a few seconds, you can telephone a person across the street, in another part of the country, or on another continent.

In its most basic form, a telephone enables people to talk with one another at distances beyond the range of the human voice. More sophisticated telephones can send and receive not only voice messages, but also written words, drawings, photographs, and even video images. In addition, telephones can send information from one computer to another.

Telephones in people's homes are connected through a vast, complex telephone network. The network includes large computers, tremendous lengths of copper wire and hair-thin strands of glass, cables buried in the ground and laid along the bottom of oceans, radio transmitters and receivers, and artificial satellites orbiting far above the earth.

Most telephones connect with the telephone network by means of wires that run through the walls of houses and other buildings. A small clip connects each telephone to the wiring. Other phones are installed in cars or carried in a bag or pocket. Such phones connect with the network by radio.

Alexander Graham Bell patented the telephone in 1876. Today, hundreds of millions of telephones serve people all over the world.

Anindita Henindya P. / XI IA 6 / 05