IP Centrex - Definition
Centrex is a PBX-like service providing switching at the central office instead of at the customer's premises. Typically, the telephone company owns and manages all the communications equipment and software necessary to implement the Centrex service and then sells various services to the customer.
In effect, Centrex provides an emulation of a hardware PBX, by using special software programming at the central office, which can be customized to meet a particular customer's needs. As with a PBX, stations inside the group can call each other with 3, 4 or 5 digits, depending on how large the group, instead of an entire telephone number. IP Centrex is the delivery and implementation of a Centrex service using VoIP. Using the location independence of IP, the IP Centrex application server can be located anywhere in the service provider’s network, and the enterprise client can connect to this network with a standard broadband IP connection. In addition to this connection, service providers supply the “Virtual PBX” service directly to IP Phones, or regular phones connected to Media Gateways.
PSTN breakout in IP Centrex network can be achieved using a centralized media gateway resource, which provides PSTN connectivity to all customers.
IP Centrex - Synonyms
IP Centrex; Centrex VoIP; Centrex voice over IP