BellSouth Business^SM Private Branch Exchange (PBX) is essentially a smaller version of a telephone company's large, central switching office. PBX equipment is located on the business' premises and allows individuals within the company to originate and answer calls to and from the public network.

BellSouth Business^SM PBX integrates voice and data communications. It also serves as the foundation for call center capabilities, wireless applications, interactive voice response and other capabilities.