The Nexcom nROK 6221-IP, based on Intel Core quad core processor E3950 (up to 2.0GHz), is specifically comply with stringent EN50155 standard in rugged, fanless and compact mechanism. nROK 6221-IP provides complete communication capability between train and computer with build-in CAN Bus 2.0B interface. nROK 6221-IP features rich WLAN and WWAN wireless connectivity. With dual SIM cards per modem support, nROK 6221-IP allows six SIM cards backup each other for a better connectivity quality by software. In addition, six SIM cards and three WWAN modules architecture can increase the bandwidth for a faster data transmission speed. Equipped with intelligent power management, nROK 6221-IP can be waked on by ignition, RTC timer or SMS message remotely. By integrating the variety of I/O ports, 3 x mini-PCIe, 2 x M.2 sockets expansibility, up to two screens via VGA connections and waterproof IP65 rating, nROK 6221-IP keeps the flexibility to meet the demand for different rolling stock applications, such as infotainment, dispatching system, cellular/wireless network connectivity, and video surveillance. The design of mini-PCIe slots x 3 can solve the potential request from the market when needed.