recording-completing trunk

recording-completing trunk

[ri′kȯrd·iŋ kəm′plēd·iŋ ‚trəŋk]
(electricity)
Trunk for extending a connection from a local line to a toll operator, used for recording the call and for completing the toll connection.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.