Neutral direct-current telegraph system
http://dbpedia.org/resource/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 (electric polarity) is immaterial.
rdf:langString
rdf:langString
Neutral direct-current telegraph system
xsd:integer
41414
xsd:integer
1118460055
rdf:langString
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 (electric polarity) is immaterial.
xsd:nonNegativeInteger
973