The hi-tech Yeastar P550 IP PBX System has been meticulously designed to strengthen and streamline your everyday business activities. Its Quad-Core processor, robust Unified Communications, and excellent interoperability enable you to maximize productivity at work. Its unique modular design allows for a combination of flexible telephony interfaces, business features, administration and security, and Unified Communications while enhancing future scalability. The Yeastar P550 IP PBX System Phone System not only boasts of embedded rich SIP capabilities but also gives you the freedom to choose what types of extensions and physical trunks as desired in your telephone system. You as well can add more users and concurrent calls with the ever-changing and growing business needs.