Portal:Telecommunication
The Telecommunication Portal
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Telecommunication, often used in its plural form or abbreviated as telecom, is the transmission of information with an immediacy comparable to face-to-face communication. As such, slow communications technologies like postal mail and pneumatic tubes are excluded from the definition. Many transmission media have been used for telecommunications throughout history, from smoke signals, beacons, semaphore telegraphs, signal flags, and optical heliographs to wires and empty space made to carry electromagnetic signals. These paths of transmission may be divided into communication channels for multiplexing, allowing for a single medium to transmit several concurrent communication sessions. Several methods of long-distance communication before the modern era used sounds like coded drumbeats, the blowing of horns, and whistles. Long-distance technologies invented during the 20th and 21st centuries generally use electric power, and include the telegraph, telephone, television, and radio.
Early telecommunication networks used metal wires as the medium for transmitting signals. These networks were used for telegraphy and telephony for many decades. In the first decade of the 20th century, a revolution in wireless communication began with breakthroughs including those made in radio communications by Guglielmo Marconi, who won the 1909 Nobel Prize in Physics. Other early pioneers in electrical and electronic telecommunications include co-inventors of the telegraph Charles Wheatstone and Samuel Morse, numerous inventors and developers of the telephone including Antonio Meucci and Alexander Graham Bell, inventors of radio Edwin Armstrong and Lee de Forest, as well as inventors of television like Vladimir K. Zworykin, John Logie Baird and Philo Farnsworth.
Since the 1960s, the proliferation of digital technologies has meant that voice communications have gradually been supplemented by data. The physical limitations of metallic media prompted the development of optical fibre. The Internet, a technology independent of any given medium, has provided global access to services for individual users and further reduced location and time limitations on communications. (Full article...)
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Videotelephony (also known as videoconferencing or video call) is the use of audio and video for simultaneous two-way communication.
There are many terms to refer to videotelephony. Videophones are standalone devices for video calling (compare Telephone). In the present day, devices like smartphones and computers are capable of video calling, reducing the demand for separate videophones. Videoconferencing implies group communication. Videoconferencing is used in telepresence, whose goal is to create the illusion that remote participants are in the same room. (Full article...)General images
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Selected biography -
Guglielmo Giovanni Maria Marconi, 1st Marquis of Marconi FRSA GCVO (Italian: [ɡuʎˈʎɛlmo marˈkoːni]; 25 April 1874 – 20 July 1937) was an Italian inventor, electrical engineer, and politician, known for his creation of a practical radio wave–based wireless telegraph system. This led to Marconi's being credited as the inventor of radio, and he shared the 1909 Nobel Prize in Physics with Karl Ferdinand Braun "in recognition of their contributions to the development of wireless telegraphy". His work laid the foundation for the development of radio, television, and all modern wireless communication systems.
Marconi was also an entrepreneur, businessman, and founder of The Wireless Telegraph & Signal Company in the United Kingdom in 1897 (which became the Marconi Company). In 1929, Marconi was ennobled as a Marchese (marquis) by King Victor Emmanuel III of Italy, and, in 1931, he set up Vatican Radio for Pope Pius XI. (Full article...)Did you know (auto-generated) -
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- ... that Shanthi Kalathil believes Radio Free Asia "filled a critical role in combating Chinese disinformation"?
- ... that Santa Maria, California, radio station KSBQ is named for the style of barbecue that originated in that city?
- ... that Fred Rogers created and hosted a television documentary series titled Old Friends ... New Friends due to his concern that older generations were getting more isolated from younger generations?
- ... that, according to its owner, KLEF in Anchorage, Alaska, was one of just three remaining commercially operated classical-music radio stations in the United States, as of 2013?
- ... that Buffalo's band, cheerleaders, and radio crew were unable to make the trip to the 2022 Camellia Bowl due to a winter storm?
- ... that the Australian case Bradley v Commonwealth held that it was unlawful to unilaterally cut off telephones to a Rhodesian information office?
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