Leds - 3Com SuperStack 3 3C17204 Getting Started Manual

connector that allows both the transmit and the receive fibers to be
connected in the same space as an RJ-45 port.

LEDs

Table 4 lists LEDs visible on the front of the Switch, and how to read their
status according to color. For information on using the LEDs for problem
solving, see
Table 4 LED behavior
LED Color
Power/Self Test LED
Green
Green flashing The Switch is either downloading software or is initializing
Yellow
Off
Port LEDs
Packet Green
Yellow
Off
Status Green
Green flashing A high speed (100 Mbps) link is present, but the port is
Yellow
Yellow flashing A low speed (10 Mbps) link is present, but the port is
Yellow flashing
(fast)
Off
"Solving Problems Indicated by LEDs"
Indicates
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 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.
Full duplex packets are being transmitted/received on the
port.
Half duplex packets are being transmitted/received on the
port.
No packets are being transmitted/received on the port.
A high speed (100 Mbps) link is present, and the port is
enabled.
disabled.
A low speed (10 Mbps) link is present, and the port is
enabled (not 4400 FX).
disabled (not 4400 FX).
The port 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 ports are disabled.
No link is present.
Switch 4400 — Front View Detail
on page
17
58.