Tp-link TL-SG1048 48-Port Gigabit Rackmount Switch        Overview 48 10/100/1000Mbps RJ45 ports Innovative energy-efficient technology saves power up to 18% Supports MAC address self-learning and auto MDI/MDIX Standard 19-inch rack-mountable steel case  Data filtering rate eliminates all error packets supports IEEE 802.3x flow control for Full Duplex mode and backpressure for Half Duplex mode Non-blocking switching architecture forwards and filters packets at full wire-speed for maximum throughput 96Gbps Switching Capacity Auto MDI/MDIX eliminates the need for crossover cables Supports MAC address auto-learning and auto-aging Support the port N-Way Auto-Negotiation, Store and Forward. Compact size design for desktops, Rackmountable Plug and Play design simplifies installation 01 year warranty