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manual telephone exchanges

См. также в других словарях:

  • Telephone exchange — A telephone operator manually connecting calls with cord pairs at a telephone switchboard. In the field of telecommunications, a telephone exchange or telephone switch is a system of electronic components that connects telephone calls. A central… …   Wikipedia

  • Telephone switchboard — PBX switchboard, 1975 A switchboard (also called a manual exchange) was a device used to connect a group of telephones manually to one another or to an outside connection, within and between telephone exchanges or private branch exchanges (PBXs) …   Wikipedia

  • Telephone numbers in the United Kingdom — +44 redirects here. For the band, see +44 (band). United Kingdom telephone numbers Location of United Kingdom (dark green) Location Country United Kingdom Continent …   Wikipedia

  • Telephone numbers in New Zealand — New Zealand telephone numbers Location Country New Zealand Continent Oceania Access codes Country calling +64 International prefix 00 …   Wikipedia

  • Telephone exchange names — During the early years of telephone service, communities that required more than 10,000 telephone numbers, whether dial service was available or not, utilized exchange names to distinguish identical numerics for different customers.When dial… …   Wikipedia

  • Telephone numbers in Australia — [Telecommunications Numbering Plan 1997 as amended 4th January, 2008] The Australian telephone numbering plan describes the allocation of phone numbers in Australia. It has changed many times, the most recent major reorganisation by the… …   Wikipedia

  • Director telephone system — The Director System was a system which made it possible to call subscribers at other telephone exchanges without operator intervention in large multi exchange cities, and to have a mixture of automatic and manual exchanges within these cities. It …   Wikipedia

  • International Bell Telephone Company — The International Bell Telephone Company (IBTC) of Brussels, Belgium, was created in 1879 by the National Bell Telephone Company of Boston, Massachusetts, United States, initially to sell imported telephones and switchboards in Continental Europe …   Wikipedia

  • Emergency telephone number — Many countries public telephone networks have a single emergency telephone number, sometimes known as the universal emergency telephone number or occasionally the emergency services number, that allows a caller to contact local emergency services …   Wikipedia

  • Timeline of the telephone — Below is a Timeline of the telephone that covers important dates in the history of the telephone.1844 to 1875*1844 Innocenzo Manzetti first mooted the idea of a “speaking telegraph” (telephone). *1849 Antonio Meucci demonstrates a communicating… …   Wikipedia

  • Business telephone system — Early model 464G Western Electric key telephone set A business telephone system is any of a range of a multiline telephone systems typically used in business environments, encompassing systems ranging from small key systems to large scale private …   Wikipedia

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