direct-current telegraphy

direct-current telegraphy

[də¦rekt ¦kə·rənt tə′leg·rə·fē]
(communications)
Telegraphy in which direct current controlled by the transmitting apparatus is supplied to the line to form the transmitted signal.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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