The nROK 6231, powered by Intel® Atom® x7433RE processor, is specifically comply with stringent EN 50155 standard in rugged, fanless, and compact mechanism. The nROK 6231 provides complete communication capability between train and computer with build-in CAN FD interface. The nROK 6231 features rich WLAN and WWAN wireless connectivity. With dual SIM cards per modem support, the nROK 6231 allows eight SIM cards backup each other for a better connectivity quality or extra bandwidth by software. In addition, eight SIM cards and four WWAN modules architecture can increase the bandwidth for a faster data transmission speed. Equipped with intelligent power management, the nROK 6231 can be waked on by ignition, RTC timer or SMS message remotely. By integrating a variety of I/O ports, three M.2 and dual Mini PCIe slots for expandability, and support for up to three screens via VGA, HDMI®, and DP connections, the nROK 6231 offers the flexibility to meet the demands of different rolling stock applications, such as infotainment, dispatch systems, cellular/wireless network connectivity, and video surveillance. The design of dual Mini PCIe slots can solve the potential request from the market when needed.