engineering channel circuit
engineering channel circuit
[‚en·jə′nir·iŋ ′chan·əl ‚sər·kət] (communications)
Auxiliary circuit or channel (radio or wire) for use by operating or maintenance personnel for communications incident to the establishment, operation, maintenance, and control of communications facilities.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.