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3Com Switch 4050 and 4060 — Front View Detail 17
Unit Status LED (cont.)
Green flashing The Switch is either downloading software or is
initializing (which includes running a Power On Self
Test).
Yellow The Switch has failed its Power On Self Test
or
A port has failed and had been automatically disabled.
You can verify this by checking that the Port Status LED
is quickly flashing Yellow. If a port fails the Switch
passes its Power On Self Test and continues to operate
normally.
Off The Switch is not receiving power or there is a fault
with the Power Supply unit.
Layer 3 LED
Green The Switch software supports Layer 3.
Off The Switch software does not support Layer 3.
PSU LEDs (Front of Switch)*
Green PSU fitted and enabled
Red PSU fitted and not operational
Red flashing PSU has shut down due to over-heating
Off No PSU fitted
PSU LED (PSU Module)
Green The PSU module is installed and is supplying DC power
to the Switch.
Off The PSU module is not supplying power and may have
shut down due to a fault.
Fans (F = Front)
Red One or both fans have failed
Red flashing Fan Tray has been removed
Off Fan Tray fitted and enabled.
Fans (R = Rear)
Red One or both fans have failed
Red flashing Fan Tray has been removed
Off Fan Tray fitted and enabled.
LED Color Indicates