Central telephone exchange, 19th century

Central telephone exchange, 19th century


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Central telephone exchange. Historical illustration of the wiring and indicators of four switchboards at a central telephone exchange. At a telephone exchange, wires and switches (forming what is called a switchboard) are used to re-route telephone calls to their destinations. The telephone was developed in the 1870s, with several inventors pioneering the technology. For close-ups of the front and back of the switchboards, see images C024/6468 and C024/6469. Artwork from 'Electricite' (1911) by Max de Nansouty, part of the 'Les merveilles de la science' series of 1867-1891 by Louis Figuier.

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