manual-switchboard telephone system

manual-switchboard telephone system
Техника: телефонная система с ручным обслуживанием

Универсальный англо-русский словарь. . 2011.

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  • Panel switch — The panel switching system was an early type of automatic telephone exchange, first put into urban service by the Bell System in the 1920s and removed during the 1970s. The Panel and Rotary systems were developed in parallel by Bell Labs before… …   Wikipedia

  • 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


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