3com 4070 Quick Setup Guide
18
C
HAPTER
1: I
NTRODUCING
THE
3C
OM
S
WITCH
40
X
0 F
AMILY
Unit Status LED (cont.)
Green flashing
The Switch is either downloading software or is
initializing (which includes running a Power On Self
Test).
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 has 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.
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.
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.
to the Switch.
Off
The PSU module is not supplying power and may have
shut down due to a fault.
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
DUA1770-9AAA04.book Page 18 Monday, April 14, 2003 11:33 AM