A PBX system, which stands for Private Automatic Branch Exchange, is basically a private phone network used within a company.

It acts like a central hub that manages all the company's phone lines and extensions, allowing for internal calls and connections to the outside world. Think of it like a switchboard that automatically connects calls without needing a person to manually route them.

PABX systems have come a long way from their origins and today offer a variety of features like voicemail, call forwarding, conferencing, and even remote access. They're a key tool for businesses to keep their communication running smoothly.