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By 1930, AT&T's "two-way television-telephone" system was in full-scale experimental use. [7] [20] The Bell Labs' Manhattan facility devoted years of research to it during the 1930s, led by Dr. Herbert Ives along with his team of more than 200 scientists, engineers and technicians, intending to develop it for both telecommunication and broadcast entertainment purposes.
Videotelephony (also known as videoconferencing or video calling) is the use of audio and video for simultaneous two-way communication. [1] Today, videotelephony is widespread. There are many terms to refer to videotelephony. Videophones are standalone devices for video calling (compare Telephone).
1882: A telephone company—an American Bell Telephone Company affiliate—is set up in Mexico City. 14 May 1883: The Adelaide exchange was opened, with 48 subscribers. [15] 7 September 1883: The Port Adelaide exchange was opened, with 21 subscribers. [15] 4 September 1884: Opening of telephone service between New York and Boston (235 miles). [23]
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.
Network Nations: A Transnational History of American and British Broadcasting (2011) John, Richard. Network Nation: Inventing American Telecommunications (Harvard U.P. 2010), emphasis on telephone; Noll, Michael. The Evolution of Media, 2007, Rowman & Littlefield; Poe, Marshall T.
Antonio Meucci, Philipp Reis, Alexander Graham Bell, and Elisha Gray amongst others, have all been credited with the telephone's invention. The early history of the telephone became and still remains a confusing morass of claims and counterclaims, which were not clarified by the huge number of lawsuits filed in order to resolve the patent ...
A payphone (alternative spelling: pay phone or pay telephone or public phone) is typically a coin-operated public telephone, often located in a telephone booth or in high-traffic public areas. Prepayment is required by inserting coins or telephone tokens , swiping a credit or debit card, or using a telephone card .
Most of the American telephone system was formerly operated by a single monopoly, AT&T, which was divided in 1984 into a long-distance telephone company and seven regional "Baby Bells". Landline telephone service continues to be divided between incumbent local exchange carriers and several competing long-distance companies. As of 2005, some of ...