... Ethernet power-sourcing equipment (PSE). It has 17 RJ45-port.. One is gigahertz uplink port, and the rest 16 ports are 10 ... SpecificationsTechnical SpecificationStandardsIEEE802.3 10BASE-T for EthernetIEEE802.3u 100BASE-TX for fast EthernetIEEE802.3ab 1000BASE-T for gigahertz EthernetIEEE802 ... 4 and 5 are positive ,Pin 7 and 8 are negative TX / RXNo.17th GigahertzLED DisplayPower ,UPLINK, Error, ...