Neutral direct-current telegraph system
In telecommunication, 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 is immaterial.
See also
References
This article incorporates public domain material from the General Services Administration document "Federal Standard 1037C" (in support of MIL-STD-188).
This article is issued from Wikipedia - version of the 11/20/2012. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.