1.Support the switch between 10/100Base-TX and 100Base-FX 2.2*155Gbps full-duplex fiber ports and 4*100M Ethernet ports with auto-negotiation function 3.Support 100M speed rate, MDI/MDIX and half/full-duplex with auto-negotiation function 4.Each port has the complete LED Indicator light 5.Support single mode single fiber,single mode dual fiber ,multi-mode dual fiber and SFP slot 6.Support IEEE802.1d Spanning Tree 7.Support high performance QoS function on each port 8.Support 5V voltage input 9.Support IEEE 802.3x flow control and back pressure control 10.Require no configuration and will instantly operate as soon as you power it up