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Network broadcast storm protection4-Port IEEE 802.3at compliant PoE+ Function with 30W/Port1-Port 10/100Tx Fast EthernetSupports Auto MDI/MDI-X FunctionStore-and-Forward Switching Architecture2K MAC Address TableEFT Protection: 2, 000 VDC supportESD Protection: 6, 000 VDC supportUL Class I, Division 2 CertifiedRedundant Power Input Design – 48~55VDCBuilt-in 1 relay output for Port Break AlarmIP30 Rugged Aluminum Case DesignDIN-Rail and Wall Mount supportOperating Temperature range - STD: -10° to 70° C, EOT: -40° to 75° C5-Year Warranty