EPABX is an abbreviation that stands for Electronic Private Automatic Branch Exchange. It comes under the category of business phone systems which serve a business environment. Multi-line connections can be made through a single telephonic connection. It is an office equipment of immense use for telephonic connectivity with extensions of a single phone line. It can be rented from office equipment suppliers too.

EPABX has proven to be of immense use in communicating within office, making routine work simpler. It can be defined as a switching system for calls that enables both internal as well as external switching functions in an organization. Typically up to 10,000 subscribers can be accommodated by a single EPABX system.