NS-280FX
: 8x SFP Slots with 2 Giga unmanaged Ethernet switch Ver.A.3
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3. Symptom:
RJ-45 port link LED light up without transmission .
Cause:
RJ-45 port link on half duplex mode or LED jitter happen
Solution:
Please make sure opposite side device setting on full duplex mode, since NS-280FX doesn’t
support helf duplex mode. If LED jitter it mean both internal chipset without compatible.
Power and Cooling Problems
If the POWER indicator does not turn on when the power cord is plugged in, you may have a problem with the power
outlet, power cord, or internal power supply. However, if the unit power is off after running for a while, check for loose
power connections, power losses or surges at the power outlet. If you still cannot isolate the problem, then the internal
power supply may be defective. In this case, please contact your local dealer.
Installation
Verify that all system components have been properly installed. If one or more components appear to be
malfunctioning (e.g. the power cord or network cabling), test them in an alternate environment where you are sure that
all the other components are functioning properly.
Transmission Mode
The default of transmission mode for RJ-45 ports is 10/100/1000 Mbps Ethernet, SFP port is 1.25Gbps (1000Base-X).
Therefore, if the Link signal is disrupted (e.g. by unplugging the network cable and plugging it back in again, or by
resetting the power), the port will try to re-establish connection with the attached device via auto-negotiation.
Physical Configuration
If problems occur after altering the network configuration, restore the original connections, and try to track the problem
