Leds - 3Com SuperStack 3 Switch 4400 Series Getting Started Manual

the appropriate connection. Alternatively, you can manually set these
ports to 10BASE-T half duplex, 10BASE-T full duplex, 100BASE-TX half
duplex or 100BASE-TX full duplex. The maximum segment length is
100 m (328 ft) over Category 5 twisted pair cable.
The 4400 PWR will supply up to 15.4W of power through any of the 24
front panel ports in conformance to the 802.3af specification. The Switch
4400 PWR incorporates a LED Mode Button on the front panel, which
when pressed changes the mode of the front panel port LEDs
functionality between Switch and Power mode.

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
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
Port LEDs — PoE mode (3C17205 only)
Packet Green
Green flashing Exceeded port power limit (overCurrent MIB state) or unable
Yellow
"Solving Problems Indicated by LEDs"
Indicates
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.
disabled.
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.
Power is being delivered to the port.
to supply power due to unit over budget (denyLowPriority
MIB state).
PoE error, no power supplied on port.
Switch 4400 — Front View Detail
on page
17
56.