Article · Wikipedia archive · Last revised Jul 16, 2026

Neutral direct-current telegraph system

In telecommunications, a neutral direct-current telegraph 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 is immaterial.

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Jul 16, 2026
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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

See also

See also

References

References

  1. Weik, Martin H. (2001), Weik, Martin H. (ed.), "neutral direct-current telegraph system", Computer Science and Communications Dictionary, Boston, MA: Springer US, p. 1096, doi:10.1007/1-4020-0613-6_12302, ISBN 978-1-4020-0613-5{{citation}}: CS1 maint: work parameter with ISBN (link)

 This article incorporates public domain material from Federal Standard 1037C. General Services Administration. Archived from the original on 2022-01-22. (in support of MIL-STD-188).