key-operated telephone

См. также в других словарях:

• telephone — telephoner, n. /tel euh fohn /, n., v., telephoned, telephoning. n. 1. an apparatus, system, or process for transmission of sound or speech to a distant point, esp. by an electric device. v.t. 2. to speak to or summon (a person) by telephone. 3.… …   Universalium

• 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 — The telephone (from the el. τῆλε, tēle , far and φωνή, phōnē , voice ) is a telecommunications device that is used to transmit and receive sound (most commonly speech), usually two people conversing but occasionally three or more. It is one of… …   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

• Field telephone — Field telephones are mobile telephones intended for military use, designed to withstand wartime conditions. They can draw power from their own battery, from a telephone exchange (via a central battery known as CB), or from an external power… …   Wikipedia

• List of telephone switches — This is intended to be a list of the more common central office (telephone company operated) telephone switches. This list is nowhere near complete. Many British and non North American switches are missing.AGCS*GTD 5 EAXAlcatel*E10 Five *E10B… …   Wikipedia

• History of the telephone — The history of the telephone chronicles the development of electrical technology that enabled bidirectional human speech conversations over distances farther than a person could shout.Telephone prehistoryMechanical devicesBefore the invention of… …   Wikipedia

• Model 500 telephone — Western Electric model 500 set made in 1951 By 1975, the Model 500 layout …   Wikipedia

• Moscow City Telephone Network — Type Joint stock Industry Telecommunications Founded July 13, 1882 Headquarters Moscow …   Wikipedia

• Wink pulsing — Wink is used both in connection with DC signaling on a trunk, and with indicator lamps on a key telephone.In telephone switching systems, wink pulsing is recurring pulsing in which the off condition is relatively short compared to the on… …   Wikipedia

• Kingston upon Hull — City of Kingston upon Hull   City and Unitary Authority area   The Queen s Gardens, Maritime Museum, and City Hall (rear) in Kingston upon Hull …   Wikipedia