An IP PBX (Internet Protocol Private Branch Exchange) is a modern phone system that uses internet protocol to manage and route voice calls within a business. It connects internal telephones and handles incoming and outgoing calls via VoIP technology, offering advanced features like call forwarding, voicemail, IVR, call recording, and more. IP PBX systems are cost-effective, scalable, and ideal for businesses looking to upgrade from traditional telephony to a more flexible and efficient communication solution.