--- title: The history of business phone system (PBX) explained in one picture description: Cloud PBX replaces the physical limitations of hardware with better security and reliability, scalability, multi-location support. image: https://blog.evoxglobal.com/hubfs/EVOXBlog/evolution_of_PBX/cloudpbx_infographic_en-us_1230.png --- [![EVOX Logo](https://blog.evoxglobal.com/hubfs/EVOXImages/Official_WEB/Header/251211_header-menu-17.webp)](https://www.evoxglobal.com/) Products ![](https://blog.evoxglobal.com/hubfs/EVOXImages/Official_WEB/EVOX%20AI/AI%20Summary/arrow-icon/down.png) EVOX AI AI-Powered Solutions [EVAA ( EVOX AI Agent )![](https://www.evoxglobal.com/wp-content/uploads/2025/09/new-icon-1.png)](https://www.evoxglobal.com/en/ai/evaa) [AI Summary](https://www.evoxglobal.com/en/ai/smart-summary) [Smart Label ![](https://www.evoxglobal.com/wp-content/uploads/2025/09/new-icon-1.png)](https://www.evoxglobal.com/en/ai/smart-label) [EVOX 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The EVOX Cloud PBX solution offers additional flexibility and convenience with mobile phone and PC/Mac apps as well as easy-to-use web based administration tool. ![cloudpbx\_infographic\_en-us\_1230](https://blog.evoxglobal.com/hs-fs/hubfs/EVOXBlog/The%20history%20of%20business%20phone%20system%20(PBX)%20explained%20in%20one%20picture/cloudpbx_infographic_en-us_0819.jpg?width=1300&name=cloudpbx_infographic_en-us_0819.jpg) Stay up to date with modern communication, cloud, AI trends and the latest EVOX news. Most popular articles： - Key Considerations for Choosing a Customer Service System - What is LINE CRM? 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