3Com 3C16980 - Manual (Page 14)

14 C HAPTER 1: I NTRODUCING THE S WITCH 3300
Table 3 LED behavior
LED Color Indicates
Port Status LEDs *
* If your Switch has 24 10BASE-T/100BASE-TX ports, these ports are numbered 1 to 24. If your
Switch has 12 10BASE-T/100BASE-TX ports, these ports are numbered 1 to 12. For both
models, ports supplied through an Expansion Module are numbered sequentially from the last
fixed port on the front of the unit.
Packet Yellow Packets are being transmitted/received on the port.
Off No packets are being transmitted/received on the
port.
Status Green A link is present, and the port is enabled.
Green flashing A link is present, but the port is disabled.
Off No link is present.
Expansion Module Port Status LEDs
Packet Yellow Packets are being transmitted/received on the
Expansion Module port(s).
Off No packets are being transmitted/received on the
Expansion Module port(s).
Status Yellow A valid Expansion Module is installed.
Yellow flashing An unrecognized Expansion Module is installed.
Off No Expansion Module is installed.
Unit LEDs
1–8 Green The Switch forms a stack with other Switch units;
the LED indicates the position of the Switch in the
stack and that a link is present. Note that although
there are eight LEDs, only four Switch units can be
stacked at present.
Off The Switch is stand-alone.
Power/Self Test LED
Green The Switch is powered-up.
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.
Off The Switch is not receiving power.
16980ua.bk Page 14 Friday, April 30, 1999 9:03 AM