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The electric telephone was invented in the 1870s, based on earlier work with harmonic (multi-signal) telegraphs. The first commercial telephone services were set up in 1878 and 1879 on both sides of the Atlantic in the cities of New Haven, Connecticut in the US and London, England in the UK.
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.
As Area Director of the User Services area, she was a member of the Internet Engineering Steering Group of the IETF from 1990 to March 1998. [245] Together with Bob Braden, she received the 2006 Postel Award in recognition of her services to the Internet. [246] She is mentioned, along with a brief biography, in RFC 1336, Who's Who in the ...
The bel (B) and the smaller decibel (dB) are units of measurement of sound pressure level (SPL) invented by Bell Labs and named after him. [218] [N 28] [219] Since 1976, the IEEE's Alexander Graham Bell Medal has been awarded to honor outstanding contributions in the field of telecommunications. A.G. Bell issue of 1940
1995 – Yahoo, an American web services provider, is launched. [48] 1996 – The first Dense Wave Division Multiplexing (WDM) system was installed Ciena Corp under the guidance of co-founder David Huber. [49] [50] WDM subsequently became the common basis of all telecommunications networks [51] and a foundation of the Internet. [52]
1989: Quantum Computer Services is renamed America Online. Voice actor Elwood Edwards is hired to record its now-iconic greeting "You've Got Mail" on a cassette tape in his living room, ...
The telephone played a major communications role in American history from the 1876 publication of its first patent by Alexander Graham Bell onward. In the 20th century the American Telephone and Telegraph Company (AT&T) dominated the telecommunication market as the at times largest company in the world, until it was broken up in 1982 and replaced by a system of competitors.
The Bell Telephone Company was the initial corporate entity from which the Bell System originated to build a continental conglomerate and monopoly in telecommunication services in the United States and Canada. The company was organized in Boston, Massachusetts, on July 9, 1877, by Alexander Graham Bell's father-in-law Gardiner Greene Hubbard.