3Com SuperStack 3 Switch 4400 Series Getting Started Manual page 18

18 C 1: I
HAPTER NTRODUCING THE
S S 3 S
UPER TACK WITCH
LED Color
Off
Status Yellow flashing PoE POST error on port. Flash rate is 4 Hz
Module LEDs
Packet Refer to the user documentation accompanying the module, if installed.
Status Refer to the user documentation accompanying the module, if installed.
Off
Yellow flashing
(fast)
Unit LEDs
1–8 Green
Green
sequential
Green
flashing
Off
Power/Self Test LED
Green
Green flashing The Switch is either downloading software or is initializing
Yellow
Off
4400
Indicates
No power is being delivered.
There is no module installed in the expansion module slot.
The module has failed and has been automatically disabled.
The Switch passes its Power On Self Test and continues to
operate normally even if one or more modules are disabled.
When the Switch forms a stack with other Switch 4400
units, the LED indicates the position of the unit in the stack
and that a link is present.
When the Switch is stand-alone and not part of a stack, LED
1 is on.
When a software upgrade is in progress, the Unit LEDs of the
unit that is being upgraded flash on and off in the following
sequence —
1,2,4,6,8,7,5,3 (24-port)
1,2,3,4,8,7,6,5 (48-port)
The Switch physically forms a stack with other Switch 4400
units, but cannot be managed as part of that stack until all
units have been upgraded to software version 2.0 or later.
A fault has occurred.
The Switch is powered-up and operating normally.
(which includes running a Power On Self Test).
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 LED Status LED is
quickly flashing Yellow. If a port fails the Switch passes its
Power On Self Test and continues to operate normally.
The Switch is not receiving power or there is a fault with the
Power Supply Unit.