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TU definition - telecom
In SONET specifications, a Virtual Tributary (VT) along with a pointer that identifies the location of the VT for purposes of switching and cross-connecting. See also cross-connect, pointer, SONET, switch, and VT.

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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