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core definition - telecom
  1. The central or essential part of a Wide Area Network (WAN) or Metropolitan Area Network (MAN) is commonly known as the core, or backbone. The network core comprises very high capacity elements and subsystems such as transmission systems, multiplexers, switches, and routers. See also MAN and WAN.
  2. The central and primary light-conducting portion of a glass optical fiber (GOF). The core is the inner portion of the fiber into which the optical signal is injected by either a light-emitting diode (LED) or one of many types of laser diodes. A single-mode fiber (SMF) used in a high speed, long haul fiber optic transmission system (FOTS) has a very narrow inner core, 5

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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