RouterBOARD 2011UiAS-RM, in comparison with RB2011L series, not only has five Gigabit LAN ports and five Fast Ethernet LAN ports, but also has RJ45 serial port, microUSB port and more RAM (128MB instead of 64MB). Also, it has RouterOS L5 license (instead of L4) and nice touchscreen LCD for configuration. SFP cage is also present.This is highly cost-effective way to connect two SFP/SFP+ devices (for example two units of CCR1036-8G-2S+) for very short distances, within racks and across adjacent racks. They provide a low cost, low power and low latency interconnect solution for 10-Gigabit Ethernet, Fiber Channel and other industry standards, and are direct attached compliant and fully conform to the SFP+ MSA specifications.RouterBOARD cAP-2nD (ceiling Access Point) is our first 2.4GHz Dual-Chain ceiling AP. Inconspicuously designed, it blends into the environment, perfect for hospitality business like hotels, airports, shopping malls etc.