![]() Such transmission paths are often divided into communication channels, which afford the advantages of multiplexing multiple concurrent communication sessions. The transmission media in telecommunication have evolved through numerous stages of technology, from beacons and other visual signals (such as smoke signals, semaphore telegraphs, signal flags, and optical heliographs), to electrical cable and electromagnetic radiation, including light. ![]() It has its origin in the desire of humans for communication over a distance greater than that feasible with the human voice, but with a similar scale of expediency thus, slow systems (such as postal mail) are excluded from the field. Telecommunication, often used in its plural form, is the transmission of information by various types of technologies over wire, radio, optical, or other electromagnetic systems. For the song by A Flock of Seagulls, see Telecommunication (song).Įarth station at the satellite communication facility in Raisting, Bavaria, Germany ![]()
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