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. ( 188 ) Synonyms single-current system, single-current transmission system , single-Morse system.
NEUTRAL DIRECT CURRENT TELEGRAPH SYSTEM
Meaning of NEUTRAL DIRECT CURRENT TELEGRAPH SYSTEM in English
Telecommunication standard terms English vocab. Английский словарь стандартных телекоммуникационных терминов. 2012