3Com SuperStack 3 3870 Getting Started Manual page 16

14 C 1: I
HAPTER NTRODUCING THE
S 3870
WITCH
LED Color
Module LEDs
Packet Yellow
Off
Status Green
Yellow
Yellow flashing
Off
Unit LED
Green
Off
Power/Self Test LED
Green
Green flashing
Yellow
Off
Fault LED
Red
Off
Indicates
Packets are being transmitted/received on the port.
No packets are being transmitted/received on the port.
The module is installed and supported and the link
status has been determined.
The module is installed and supported but there is no
link or an indeterminate link status.
The module is installed but not supported or has failed
POST.
The module is not installed.
The Switch is stacked and the position within the stack
is displayed.
The Switch is not stacked.
The Switch is powered on and operating normally.
The Switch is either downloading software or is
initializing (which includes running a Power On Self
Test).
The Switch is faulty.
The Switch is not receiving power or there is a fault
with the power supply unit.
The Switch and/or the PSU and/or the module are
above critical temperature but below critical shut down
temperature. Fans are operating normally.
The Switch, PSU, and the module are below critical
temperature. One or more fans have failed.