What is a Private Branch Exchange (PBX) defined as?

A Private Branch Exchange (PBX) is specifically designed to manage internal telephone communications within an organization. Unlike a standard telephone exchange that directly connects calls for the general public, a PBX allows a private organization to control its internal telephone system. This enables the organization to route incoming and outgoing calls efficiently while also providing various features such as voicemail, call forwarding, and extensions for employees.

The characteristics of a PBX system facilitate communication between different departments or sections of a company without needing multiple external telephone lines, ultimately reducing costs while enhancing productivity. Thus, defining a PBX as a telephone exchange for private organizations captures its primary function and purpose accurately.