Technical Specifications Operating standards: IEEE802.3z/AB, 10/100/1000Base-T and 1000Base-SX/LX/HX MAC address table: 4K Data Buffer: 256K Connector: UTP: RJ-45,10/100/1000Mbps; Fiber: LC,1000Mbps Cable : UTP cable: Cat 5e or Cat 6 (the max distance up to 100m) Fiber : multimode : 50/125, 62.5/125¦Ìm (the max distance up to 550/224m) singlemode : 8.3/125, 8.7/125, 9/125¦Ìm (the max distance up to 100km) Flow control Full Duplex: IEEE802.3x Half Duplex: back pressure. Power: AC 220V(170-260V) 50Hz; DC 5V£¬1A Ambient temperature: 0 ¡« +50 Storage temperature: -20 ¡« +70 Humidity: 5% ¡« 90% Dimensions: Internal Power: 40 (high) x 110 (width) x 140 (length) mm External Power: 26 (high) x 70 (width) x 93 (length) mm.