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Neutral direct-current telegraph system
From Wikipedia, the free encyclopedia
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In telecommunications, a neutral direct-current telegraph system (single-current system, single-current transmission system, single-Morse system) is a telegraph system in which (a) current flows during marking intervals and no current flows during spacing intervals for the transmission of signals over a line, and (b) the direction of current flow (electric polarity) is immaterial.[1]
 | The topic of this article may not meet Wikipedia's general notability guideline. (July 2020) |
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