manual telephone switchboards

См. также в других словарях:

• 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 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

• 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

• 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

• Ericsson — Infobox Company company name = Telefonaktiebolaget L. M. Ericsson company company type = Public (OMX|SSE101|ERIC B) (nasdaq|ERIC) company slogan = Taking You Forward foundation = Stockholm, Sweden (1876) founder = Lars Magnus Ericsson location =… …   Wikipedia

• TRS connector — 1⁄4 in TRS connector Trip …   Wikipedia

• military communication — Introduction       the transmission of information from reconnaissance and other units in contact with the enemy and the means for exercising command by the transmission of orders and instructions of commanders to their subordinates. As such, it… …   Universalium

• computer — computerlike, adj. /keuhm pyooh teuhr/, n. 1. Also called processor. an electronic device designed to accept data, perform prescribed mathematical and logical operations at high speed, and display the results of these operations. Cf. analog… …   Universalium

• Private branch exchange — A private branch exchange (PBX) is a telephone exchange that serves a particular business or office, as opposed to one that a common carrier or telephone company operates for many businesses or for the general public. PBXs are also referred to as …   Wikipedia

• GPO telephones — The United Kingdom s General Post Office (GPO) had a number of telephones that were provided by them for connection to their exchanges. Until 1982 the GPO had a monopoly on the provision of all telephones within the UK and so the range was… …   Wikipedia

• JT Global — Type Subsidiary Industry Communications Founded 1888 Headquarters …   Wikipedia