EPABC is an Electronic Private Automatic Branch Exchange. At many enterprises and offices a Private Branch exchange serves as call and communication services in office. Which replace the use of network carrier devices, with private intercommunication service. PBXs are also called private automatic branch exchange. They are communication systems which basically conduct both internal and external switching function of any organisations. Installation of EPBAX in offices is pesky job at it requires wide range knowledge of traffic patterns of the office.
EPABX grew popular in offices because of technological revolution in branch of electronics and with boom in microprocessor and micro controller industry