Telephone

A telephone, or phone, is a telecommunications device that permits two or more users to conduct a conversation when they are too far apart to be heard directly. A telephone converts sound, typically and most efficiently the human voice, into electronic signals suitable for transmission via cables or other transmission media over long distances, and replays such signals simultaneously in audible form to its user.

In 1876, Scottish emigrant Alexander Graham Bell was the first to be granted a United States patent for a device that produced clearly intelligible replication of the human voice. This instrument was further developed by many others. The telephone was the first device in history that enabled people to talk directly with each other across large distances. Telephones rapidly became indispensable to businesses, government, and households, and are today some of the most widely used small appliances.

Téléphone

Téléphone was a French rock band formed in 1976 by Jean-Louis Aubert (singer/guitarist), Louis Bertignac (guitarist/singer), Corine Marienneau (bass/singer) and Richard Kolinka (drums).

Their first, self-titled album, was released in 1977; by the end of the decade they were one of the biggest French rock bands around, opening shows for The Rolling Stones in Paris, Quebec, the United States and Japan. The band split in 1986 for personal reasons.

Among their best-known songs are "Hygiaphone", "Métro c'est trop" ("Metro's Too Much"), "La bombe humaine" ("Human bomb"), "Argent trop cher" ("Money Too Expensive"), "Ça c'est vraiment toi" ("That Is So You"), "Cendrillon" ("Cinderella"), "New York avec toi" ("New York With You") and "Un autre Monde" ("Another World").

Discography

Studio albums

Radiotelephone

A radiotelephone (or radiophone) is a communications system for transmission of speech over radio. Radiotelephone systems are not necessarily interconnected with the public "land line" telephone network. "Radiotelephony" means transmission of sound (audio) by radio, in contrast to radiotelegraphy (transmission of telegraph signals) or video transmission. Where a two-way radio system is arranged for speaking and listening at a mobile station, and where it can be interconnected to the public switched telephone system, the system can provide mobile telephone service.

Design

Mode of emission

The word phone has a long precedent beginning with early US wireless voice systems. The term means voice as opposed to telegraph or Morse code. This would include systems fitting into the category of two-way radio or one-way voice broadcasts such as coastal maritime weather. The term is still popular in the amateur radio community and in US Federal Communications Commission regulations.

Modes of operation