EPBX/IP PBX is the next generation of business telephony system which is designed to deliver voice over a data network. In essence, Voice over Internet Protocol gateways are combined with traditional PBX functionality enabling businesses to use their managed intranet to help reduce long distance expenses, enjoy the benefits of a single network for voice and data and advanced Computer Telephony Integration features.IP PBX has features that let your business run more effectively and with fewer hassles. It does all of this for a fraction of the cost of the PBX dinosaurs of the past.