The Bell System was a system of telecommunication companies, led by the Bell Telephone Company and later by the American Telephone and Telegraph Company, that dominated the telephone services industry in North America for over one hundred years from its creation in 1877 until its antitrust breakup in 1983. The system of companies was often colloquially called Ma Bell, as it held a vertical monopoly over telecommunication products and services in most areas of the United States and Canada. At the
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See all related content →. Bell System, a former American telephone system, governed by American Telephone & Telegraph Company (now AT&T Corporation; q.v.) and including Western Electric Company ( q.v. ), the system’s manufacturer; Bell Laboratories ( q.v. ), the research and development facility; and other departments and 22 operating companies. The system was dismantled in 1983, when the 22 operating companies were divested by AT&T under court order.
The XL5 door entry telephone. The XL5 are the most recent models in our audio range and off a contemporary look to complement modern wall furnishings. Bell System (Telephones) Ltd, offer a complete range of door entry systems for the UK domestic and exports market. We design and manufacture an impressive range of audio and video door entry telephones incorporating innovative features and functions demanded by the expanding door entry systems and access control markets.
The Bell System, a.k.a. “Ma Bell” or simply “THE telephone company”, was not a "company" but rather an aggregate term for AT&T encompassing 24 Bell operating companies providing local exchange phone service, the AT&T Long Lines Division providing long distance connections, an equipment manufacturing arm known as Western Electric, and a research and development arm known as Bell Laboratories.
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The Visiplex expandable wireless school bell system offers, in addition to accurate, schedule based break bell alerts, additional features, such as wireless PA speakers for live voice paging, text messaging to LED message boards, time synchronization to analog & digital clocks, automated emergency alerts and background music.