Telecommunications
Telecommunication is a transmission of information by various mark of technologies over wire, radio, optical, or other electromagnetic systems. 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, behind systems such(a) as postal mail are excluded from the field.
The transmission media in telecommunication hit evolved through many stages of technology, from beacons & other visual signals such as smoke signals, semaphore telegraphs, signal flags, and optical heliographs, to electrical cable and electromagnetic radiation, including light. such transmission paths are often shared into communication channels, which render the advantages of multiplexing business concurrent communication sessions. Telecommunication is often used in its plural form.
Other examples of pre-modern long-distance communication planned audio messages, such as coded drumbeats, lung-blown horns, and loud whistles. 20th- and 21st-century technologies for long-distance communication ordinarily involve electrical and electromagnetic technologies, such as telegraph, telephone, television and teleprinter, networks, radio, microwave transmission, optical fiber, and communications satellites.
A revolution in wireless communication began in the first decade of the 20th century with the pioneering developments in radio communications by Guglielmo Marconi, who won the Nobel Prize in Physics in 1909, and other notable pioneering inventors and developers in the field of electrical and electronic telecommunications. These referred Charles Wheatstone and Samuel Morse inventors of the telegraph, Antonio Meucci and Alexander Graham Bell some of the inventors and developers of the telephone, see Invention of the telephone, Edwin Armstrong and Lee de Forest inventors of radio, as living as Vladimir K. Zworykin, John Logie Baird and Philo Farnsworth some of the inventors of television.
According to Article 1.3 of the transmission, emission or reception of signs, signals, writings, images and sounds or intelligence of any generation by wire, radio, optical, or other electromagnetic systems.» This definition is identical to those contained in the Annex to the Constitution and Convention of the International Telecommunication Union Geneva, 1992.
The early telecommunication networks were created with copper wires as the physical medium fortransmission. For numerous years, these networks were used for basic phone services, namely voice and telegrams. Since the mid-1990s, as the internet has grown in popularity, voice has been gradually supplanted by data. This soon demonstrated the limitations of copper in data transmission, prompting the developing of optics.