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Acoustically coupled modem, 1980s.

Exton, David

Acoustically coupled modem, 1980s.
3 4 c m
actual image size: 32cm x 26cm


General view of a Lex-II modem shown with a telephone receiver attached. The modem is a device for transmitting computer data over telephone lines. The modem converts the digital signals produced by a computer to analogue signals which can be transmitted over the telephone system. Modems enable computers to communicate with each other anywhere in the world.

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© Science Museum / Science & Society Picture Library

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