3Com 3CRDSF9PWR-US User Guide - Page 18

18 CHAPTER 1: GETTING STARTED LED Status Indicators The OfficeConnect Managed Fast Ethernet PoE switch provides LED indicators on the front panel for your convenience to monitor the switch. Table 2 describes the meanings of the LEDs. Table 2 Description on the LEDs of the OfficeConnect Managed Fast Ethernet PoE Switch LED Label Status Description Power Power Green The switch starts normally. The LED flashes when the system is performing power-on self test (POST) or firmware is being upgraded. Yellow The system has failed the POST. OFF The switch is powered off. 10/100 Link/ BASE-TX Activity Ethernet port status Green The port works at the rate of 100 Mbps; the LED flashes quickly when the port is sending or receiving data. Yellow The port works at the rate of 10 Mbps; the LED flashes quickly when the port is sending or receiving data. OFF The port is not connected. 10/100/1000 Link/ BASE-T Activity Ethernet port status Green The port works at the rate of 1000 Mbps; the LED flashes quickly when the port is sending or receiving data. Yellow The port works at the rate of 10/100 Mbps; the LED flashes quickly when the port is sending or receiving data. OFF The port is not connected. Duplex mode Duplex Yellow The port is in full duplex mode. OFF The port is not connected, or is in half duplex mode. 100/1000 Module Green An SFP module is inserted. Base SFP port Active status OFF An SFP module is not inserted or is not recognized. PoE status PoE Green Delivering power. The LED flashes if a fault occurs. Status OFF Not delivering power.