What Does Central Office Exchange Service (Centrex) Mean?
Central office exchange service (Centrex) is a service available from local telephone companies to business users that allows them to avoid having to purchase their own facilities. This service effectively partitions centralized capabilities among business customers and provides switching at the central office instead of the company premises. The telephone company manages all the required equipment for implementing a private branch exchange (PBX) and actually sells the services to the business customer.The central office exchange server can be used in local government, professional offices, banks and financial institutions, hotels, colleges, universities, and small businesses.