supervision

supervision definition - telecom
A basic signaling function that indicates the status of a component, such as trunk idle or busy, telephone on-hook or off-hook. In early switchboard operation, a human operator put a receiver across a line to monitor the status of a call, to determine if the call was in progress or had been terminated. See also call, signaling and control, switchboard, and trunk.

Webster's New World Telecom Dictionary Copyright © 2008 by Wiley Publishing, Inc., Indianapolis, Indiana.
Used by arrangement with John Wiley & Sons, Inc.

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