Indoor Switch. 10 Gigabit fiber connectivity way over a 100 meters - for small offices or ISPs. CRS310 supports hardware offloaded VLAN- filtering. And even some hardware offloaded Layer-3 routing. CRS310-1G-5S-4S+IN is a fantastic tool for anyone working with indoor connections over 100 meters while keeping data loss and ping low With five 1G SFP ports, four 10G SFP+ ports, and an additional Gigabit Ethernet port, this is the perfect upgrade for existing CRS212 setups. You?re getting the modern ARM v7 CPU, 256 MB of RAM, and better cooling. The Gigabit Ethernet port has a direct connection to the switch chip - so you can enjoy full gigabit speed there. And it supports PoE-in, giving you an additional powering option in tricky spots.