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4.
Trouble Shooting
The Switch can be easily monitored through panel indicators to
assist in identifying problems. This section describes common
problems you may encounter and where you can find possible
solutions.
n Diagnosing LED Indicator
If Link indicator does not light up after making a connection.
You may check whether network interface (e.g., a network
adapter card on the attached device), network cable, or
switch port is defective or not. Verify that the switch and
attached device are power on. Be sure the cable is plugged
into both the switch and corresponding device. Verified the
proper cable type is used and its length does not exceed
specified limits.
n Power
If the power indicator does turn on when the power cord is
plugged in, you may have a problem with power outlet, or
power cord. However, if the Switch powers off after running
for a while, check for loose power connections, power losses
or surges at power outlet. If you still cannot resolve the
problem, contact your local dealer for assistance.
n Transmission Mode
Verify that each port is set to the same transmission mode
used by the attached device (i.e., half or full duplex). RJ-45
port use auto-negotiation to set the transmission mode. If the
attached device operates at half duplex, the default when
auto-negotiation fails, then it does not have to support auto-
negotiation.