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simplex printer

simplex printer in Technology

communications
A term applied by Western Union Telegraph Company to teletypewriters that are not part of a multiplex system. They usually provided for alternate transmission in both directions. If working simplex or half-duplex, what was keyed in at the keyboard would be typed out at the printing portion. If working full-duplex, sending would be blind as the printing portion was being used only for reception.
(2000-04-02)

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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