Allied Telesis AT-8550 - Manual (Page 15)

AT-9108, AT-8518, AT-8525, and AT-8550 Installation Guide
1-7
Table 1-4 describes the LED indications on the AT-8525 and the AT-8550.
Full-Duplex The switches provide full-duplex support for all ports. Full-duplex allows frames to
be transmitted and received simultaneously and, in effect, doubles the bandwidth
available on a link. All 10/100 Mbps ports on the switches auto-negotiate for half- or
full-duplex operation.
Table 1-4 AT-8525 and AT-8550 LEDs
LED Color Indicates
Power Green
Yellow
The switch is powered up.
The switch is indicating a power, overheat, or fan failure.
MGMT Green
flashing:
Slow
Fast
Yellow
The switch is operating normally.
Power On Self Test (POST) or software download in progress.
The switch has failed its POST.
10/100Mbps Port Status LEDs
Green
Yellow
Green
flashing
Off
Link is present; port is enabled.
Frames are being transmitted/received on this port.
Link is present; port is disabled.
Link is not present.
Gigabit Ethernet Port Status LEDs
Packet Yellow
Off
Frames are being transmitted/received on this port.
No activity on this port.
Status Green on
Green
flashing
Off
Link is present; port is enabled; full-duplex operation.
Link is present; port is disabled.
Link is not present.