What Is Cloud PBX? The 2026 Guide for MSPs and Growing Businesses

Cloud PBX has become the default choice for businesses that want a modern, flexible phone system without the burden of maintaining hardware. Instead of relying on an aging PBX tucked in a telecom closet, companies are turning to cloud PBX platforms that run in secure data centers, support remote teams, and scale instantly as they grow. For MSPs and IT providers, understanding what cloud PBX is — and why adoption keeps accelerating — is now essential.