... Effective short circuit, overload and total power protection 11. Each port with indicator light, alarm light, device alarm light12. Metal case ... ,8Data (1,2,3,6)ProtocolsCSMA/CDPower supply External Power Adaptor (POE04)(100V-240V AC 50Hz-60Hz, DC48V/ 2.5A) ... Internal power adaptor (POE08)(200V-240V AC 2A 50Hz-60Hz)Overcurrent protectionImplementedStorage temperature ...