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Plain Old Telephone Service (POTS), or Plain Ordinary Telephone System, [1] is a retronym for voice-grade telephone service that employs analog signal transmission over copper loops. The term POTS originally stood for Post Office Telephone Service , as early telephone lines in many regions were operated directly by local Post Offices .
1980s MirTone intercom system. An intercom, also called an intercommunication device, intercommunicator, or interphone, is a stand-alone voice communications system for use within a building, small collection of buildings or portably within a small coverage area, which functions independently of the public telephone network. [1]
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.
That’s part of a sweeping move by phone service providers to replace older copper wire-based telephone systems lines, also known as Plain Old Telephone Service (POTS), with faster and more ...
A typical Western Electric hand telephone set of c. 1930. It consists of a handset mounting with the handset held in a cradle, and a subscriber set mounted against a wall or vertical surface in close proximity. Shown is a B1A hand telephone set, also known as the type 102B-3 hand telephone set.
35 Kvant-Intercom. 36 KD. 37 Leich. 38 LG Electronics. 39 LONIIS. 40 Marconi (was ... This list of telephone switches is a compilation of telephone switches used in ...
An 1894 Stromberg Carlson telephone, one of the oldest operating telephones in the U.S., is available for public use at the Shohola Museum of Communications and Technology. Further history details, as Datagraphix was acquired by Anacomp. DocuLynx then acquired Anacomp, as COM(Computer Output Microfiche) passed into the history books.
A sound-powered telephone is a communication device that allows users to talk to each other with the use of a handset, similar to a conventional telephone, but without the use of external power. This technology has been used since at least 1944 [ 1 ] for both routine and emergency communication on ships to allow communication between key ...