232TroubleshootingIf you find any problem, please take the following steps to check. LED indicators The power LED (PWR) is not lit. Check if the power cord is disconnected. Please confirm that the power cord is securely connected to thepower port. The link/send & receive LED (LINK/ACT.) is not lit. Is the cable correctly connected to the target port? Is each terminal connected to the target port compliant with itsspecifications? Auto-negotiation may have failed. Set the port of this Switching Hub or the terminal to half-duplexmode.◆ Communications fail. Communications with all ports are impossible or slow. Are the communication speed and mode settings correct? If the communication mode signal cannot be properly obtained, applyhalf-duplex mode.Switch the communication mode of the connection target tohalf-duplex mode.Do not fix the communication mode of the connected terminal tofull-duplex mode. Is the bandwidth usage rate of the backbone network to which thisSwitching Hub is connected excessively high? Try separating this Switching Hub from the backbone network.◆ PoE power supply is impossible. The PoE power supply LED (PoE) is not lit. Is the cable appropriate to use and connected to a port that supportsPoE power supply? Is the PoE-ready terminal connected to the port compliant with the
