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half-duplex

[haf-doo-pleks, -dyoo-, hahf-] /ˈhæfˈdu plɛks, -ˈdyu-, ˈhɑf-/
adjective
1.
of or relating to the transmission of information in opposite directions but not simultaneously.
Compare full-duplex.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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half-duplex in Technology

communications
(hdx, from telegraphy) 1. A type of communication channel using a single circuit which can carry data in either direction but not both directions at once.
Compare: simplex, full-duplex.
2. An obsolete term for local echo.
(2001-07-21)

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