Central Grandstream UCM6302A Central Grandstream IP PBX UCM6302A features a streamlined and elegant shape, specially designed to meet the needs of businesses and companies that want to control their communications, allows companies to build strong and scalable communications and collaboration solutions, and supports multiple features such as voice calls, video calls and conferences Video and allows employees to communicate via computers, mobile phone and video conferencing devices, in addition to supporting 500 users and supporting up to 75 simultaneous calls. Features of Central Grandstream UCM6302A IP-PBX FXS 2RJ11Port, FXO 2RJ11 Port- 500 Users, 75 Concurrent Calls- 1*USB 3.0, 1*SD card interface - 3 Gigabit Ports with PoE+- 5 meeting rooms and up to 75 parties -