Troubleshooting
If 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 at
Is the Switching Hub
used in a place where operating temperature is between 0
and 40
°C
?
The SD CARD LED is not lit.
Is the SD card installed?
Check that the SD card
* For detailed configuration and management method, please see
the PDF version Operating Instructions in CD-ROM.
You can also downloads the latest Operating Instructions from
our website.
the power port.
Use the Switching Hub within therange of operating temperature.
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 Hub
operates 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 excessively
high?
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 stacks
identical?
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