What is centrex service?
Generally speaking, Centrex service is the outsourcing of internal enterprise telephony services to an external service provider. The telephony services included in most cases are the following: Toll-free calls within the organization; Extension dialing (e.g., four digits); Networked, toll-free calls between different branches of the organization; Connection to the PSTN; IVR/Auto Attendant; Voice mail and/or unified messaging; Basic call center; and Internal/External conferencing. When Centrex services are not employed, enterprises need to purchase, install, and maintain all the equipment required to provide the services mentioned above: PBXs, IVR servers, voice mail servers, etc. With the Centrex model, the service provider is responsible for providing the services using its own equipment which is usually purchased for a group of customers, and installed in the central office of the service provider or at the customer premises. Why Use Centrex Services? Most enterprises today tend to
