PBX Hear it!

PBX definition

PBX (pē′bē′eks′)

noun

a telephone system operating within one building, company, etc. and having outside telephone lines

Etymology: p(rivate) b(ranch) (e)x(change)

Webster's New World College Dictionary Copyright © 2005 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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