An IP PBX is a modern telephony system that manages and routes calls over an IP network, such as the internet, instead of traditional phone lines. It enables businesses to handle internal and external communications efficiently while integrating voice, video, messaging, and other collaboration tools. With features like call forwarding, voicemail-to-email, auto-attendant, and remote extensions, IP PBX systems are cost-effective, scalable, and ideal for businesses looking to enhance their communication infrastructure.