A PBX — Private Branch Exchange — is a private telephone network used within a business that allows internal communication between employees and manages incoming and outgoing external calls. Think of it as the brain of your office phone system — it routes calls to the right desk, manages hold queues, handles transfers and controls extensions. Traditional PBX systems were physical hardware installed on-site and maintained by a technician. Modern cloud-based PBX systems do the same thing over the internet, removing the need for expensive hardware. For Caribbean businesses, cloud PBX has been a game changer — a small office in Trinidad can now have a professional multi-line phone system at a fraction of the traditional cost. The next evolution beyond cloud PBX is AI-powered Voice Agents, which don’t just route calls — they answer them, understand them, and resolve them without any human involvement at all.