Central office exchange service

<communications> (Centrex) A PBX service providing switching at the central office instead of at the company premises.

Typically, the telephone company owns and manages all the communications equipment necessary to implement the PBX and then sells various services to the company.

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CELP CEN CENELEC centi-call second central office	Centrex	central processing unit Centrex Centronics Centrum voor Wiskunde en Informatica centum call second