private branch exchange

P p

Definitions of private branch exchange words

noun Technical meaning of private branch exchange (communications) (PBX) A telephone exchange local to a particular organisation who use, rather than provide, telephone services. The earliest PBXs were manual (Private Manual Branch EXchange, PMBX) but are now more likely to be automatic (Private Automatic Branch eXchange). 1
noun private branch exchange a telephone system that handles the internal and external calls of a building, firm, etc 0
noun private branch exchange (Idiomatic) A telecommunications switching system, physically located at a customer's place of business, that provides internal communication between users and also access to outside (trunk) telephone lines. 0

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A common word. It’s meaning is known to most children of preschool age. About 93% of English native speakers know the meaning and use the word.

Most Europeans know this English word. The frequency of it’s usage is somewhere between "mom" and "screwdriver".

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