Science and practice of transmitting information by electromagnetic means. A wide variety of information can be transferred through a telecommunications system, including voice and music, still-frame and full-motion pictures, computer files and applications, and telegraphic data. For details on the telephone and the development of telephony, see telephone. For similar information on telegraphy, see telegraph. For the development of radio and television transmission, see radio and television. Transmission over electric wire, radio wave, and optical fibre is discussed in telecommunications media. For an overview of the types of networks used in information transmission, see telecommunications network. For full-length discussions of the scientific principles underlying telecommunication, see the articles magnetism, electromagnetic radiation, and integrated circuit.
Principles of telecommunication
Block diagram of a digital telecommunications system.
Encyclopædia Britannica, Inc.
Modern telecommunication centres on the problems involved in transmitting large volumes of information over long distances without damaging loss due to noise and interference. Figure 1 shows the basic components of a typical digital telecommunications system capable of transmitting voice, facsimile, data, radio, or television signals. Digital… (Activate your FREE trial to view the full 6541 word article, or log in.)
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