Troubleshooting1057TroubleshootingIf you find any problem, please take the following steps to check.LED* The POWER LED is not lit.- Is the power plug connected?Check that the power plug is firmly connected, so the connection is not loose atthe power port.- Is this Switching Hub used in a place where operating temperature is between 0and 40 degrees C?Use the Switching Hub within the range of operating temperature.* The SD CARD LED is not lit.- Is the SD card installed?Check that the SD card is firmly inserted.Communication Failure* Is the UTP/fiber cable connected to the correct port?* Are the SFP modules complied with the same standard each other?* Is the fiber cable correct the fiber mode (single or multi)?* Attempt to disable “Power Saving” function at target port.* Are the communication speed and mode settings correct?If the communication mode signal cannot be properly obtained, the Switching Huboperates in half-duplex mode. Check the auto negotiation setting again.Do not fix the speed/duplex mode of the connected terminal to full-duplex mode.* Is the usage rate of the network to which this Switching Hub is connected excessivelyhigh?Try separating this Switching Hub from the network.Stacking Failure* Is the stacking function enabled?* Is the SFP+ direct attached cable connected to stacking port (port 27 or 28) correctly?* Is the STACK ID LED displayed the correct ID?* Are all of the firmware versions for the devices that are connected to the stacksidentical?
