TP-Link 48 Port 10/100Mbps Fast Ethernet Switch , Plug and Play , Rackmount , Sturdy Metal w/ Shielded Ports , Fanless , Unmanaged (TL-SF1048) 
 
About this item
48 10/100Mbps RJ45 ports 
Innovative energy-efficient technology saves power up to 50% 
Supports MAC address self-learning and auto MDI/MDIX 
Input: 100~240VAC, 50/60Hz Output: 3.3VDC/8A 
Innovative energy-efficient technology saves power up to 50% 
100% Data filtering rate eliminates all error packets 
Supports IEEE 802.3x flow control for Full Duplex mode and backpressure for Half Duplex mode 
9.6Gbps Switching Capacity
Auto-MDI/MDIX eliminates the need for crossover cables
Supports MAC address auto-learning and auto-aging
Compact size design for desktops, Rackmountable