Definitions for "centrex"
a contracted form of CENTRal EXchange.
A type of private branch exchange service where incoming calls may be dialed direct to extensions without operator assistance. Outgoing and intercom calls may be dialed by extension users.
The term used to denote the provision of PBX-type functionality and network services direct to the subscriber from a telecom operator's CENTRalised EXchange.
Keywords:  centrino