Optical Cloud Router Switch CRS520-4XS-16XQ-RM is a backbone optical switch to the most exposed parts of your network. This central optical switch that offers 16x QSFP28 at 100 Gbps, 4x SFP28 at 25 Gbps, 2x 10Gigabit ethernet and console RJ45 port. The power supply is provided by two redundant Hot-swap sources, which are part of the package, and the cooling is provided by four Hot-swap fans for maximum cooling of the switch. The maximum consumption of the device is 123 W (183 W with all SFPs connected).