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GTE Corporation, formerly General Telephone & Electronics Corporation (1955–1982), [2] was the largest independent telephone company in the United States during the days of the Bell System. The company operated from 1926, with roots tracing further back than that, until 2000, when it was acquired by Bell Atlantic, which changed its name to ...
A mobile phone or cellphone or hand phone is a handheld telephone which connects via radio transmissions to a cellular telephone network. The cellular network consists of a network of ground based transmitter/receiver stations with antennas – which are usually located on towers or on buildings – and infrastructure connecting to the global ...
Theodore Gary & Company was a 20th-century independent telephone firm in the United States. Among its subsidiaries was the Associated Telephone and Telegraph Company, which controlled telephone companies in Latin America and telephone manufacturing interests in Europe in the 1920s and 1930s.
Verizon South was originally established in 1947 as The Bluefield Telephone Corporation, providing telephone service to communities in Virginia including its namesake Bluefield. The company's first president was R.A. Phillips and was formally incorporated by Judson Large, Dean A. Esling, Richard L. Merrick, William W. Darrow, and Roland K ...
A standard landline telephone allows both users to talk and listen simultaneously; effectively there are two open communication channels between the two end-to-end users of the system. In a radiotelephone system, this form of working, known as full-duplex , requires a radio system to simultaneously transmit and receive on two separate ...
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During the period when Type N-1 was in widespread use, Lenkurt Corporation, owned and controlled by General Telephone, fielded a variant competitor, the Type BN. BN used the same pairs and repeaters as did the Bell N-CXR, but used four channel "groups," lower single-sideband heterodyning, and 24 channels per carrier, as later seen on Western ...
11 February 1876: Elisha Gray invents a liquid transmitter for use with a telephone, but he did not make one. 14 February 1876 about 9:30 am: Gray or his lawyer brings Gray's patent caveat for the telephone to the Washington, D.C. Patent Office (a caveat was a notice of intention to file a patent application.