EPABX stands for Electronic Private Automatic Branch Exchange which is a private telephone network used by the organizations and the companies for various types of communication, either between the employees or outside the clients. PBX which is Private Brand Exchange is a telephone exchange which is used by a particular office or business, opposite to the one that a common carrier or telephone company operates for many companies and businesses for the general public. Private Branch Exchange (PBX) is also known as (PABX) Private Automatic Branch Exchange and (EPABX) Electronic Private Automatic Branch Exchange.

EPABX is essential equipment that has made daily working in the offices and organizations much smoother and simpler, especially the area of communication. This system is a switching system which has enabled both internal and external stitching functions for any organization. To select an appropriate EPABX one need to have proper knowledge about the traffic pattern inside the office.


utilization of the EPABX, all the internal and external requirements of the organization are adequately served. With the advancement in the field of computers along with the advent of microprocessors, the EPABX incorporates a lot of helpful features. The boss can establish a hotline with his or her immediate subordinates.

The call transferring and forwarding feature has enabled the mobility of the users. Automatic redialing of numbers and auto conferencing has initiated engagement which is also one of the advancements in the characteristics of the EPABX. A proper survey of the organization should be done before the selection of an EPABX for the particular company. The exchange should incorporate a supporting system such as voice DISA-n-auto attendant. This feature is of great help to attendants and receptionist. The further specifications of this system
should ensure inbuilt paging, auto fax homing, hot outward dialing, remote
dialing; auto shut dynamic shot, as well as remote servicing.

How does this system work?
This telephone system helps businesses to cut cost by using a private branch exchange. With the help of this system, businesses aren’t required to run a line from every phone in the building to the telephone company’s central office. The PBX Setup: Initially during the 20th century, PBX used to run on analog technology, but today it has gone digital. The typical private branch exchanges incorporate several phone lines from outside the building which terminates at the company exchange. It also includes several internal lines that lead to the exchange for the inside phones. A computer is used that manages the calls and switches them to one line to another based on the number dialed. This digital PBX doesn’t require a human operator.

VoIP for PBX:
VoIP technology is Voice Over Internet Protocol, and some of the exchanges rely on this technology. This system turns phone calls into data packages and then sends them over a computer network. As compared to regular PBX, a VoIP cuts the extra cost because the company can use one network for phone calls and data instead of two. PBX has a central server and not a central switchboard. The phones in the office have particular software and hardware to connect to the server.

Virtual PBX: Business is not required to set up the exchange inside the building as virtual PBX turns that responsibility over to another company. When the other company provides PBX services, it brings along a lot of advantages. You are not restricted to any physical limits on the number of lines and can get more when needed. The virtual PBX is also known as hosted PBX systems.