An IP PBX telephone system (Internet Protocol Private Branch Exchange) is a modern business phone system that manages internal and external calls over an IP network. Instead of relying on separate physical phone lines, it uses data networks to route voice calls digitally. https://akomtechnologies86.wordpress.com/2025/12/30/why-an-ip-pbx-telephone-system-is-essential-for-scalable-and-cost-effective-calling/