supervisory signal

supervisory signal

[¦sü·pər¦vīz·ə·rē ′sig·nəl]
(electricity)
A signal which indicates the operating condition of a circuit or a combination of circuits in a switching apparatus or other electrical equipment to an attendant.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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