Allied Telesis AT-8550 - Manual (Page 13)

AT-9108, AT-8518, AT-8525, and AT-8550 Installation Guide
1-5
Note
For more information on 1000Base-SX and 1000Base-LX link characteristics, refer
to IEEE 802.3z, Section 38.
LEDs Table 1-2 describes the light emitting diode (LED) indications on the AT-9108..
Table 1-1 Media Types and Distances
Standard Media Type
Mhz/Km
Rating
Maximum Distance
1000Base-SX 50/125um Multimode Fiber
50/125um Multimode Fiber
62.5/125um Multimode Fiber
62.5/125um Multimode Fiber
400
500
160
200
500 m (1640 ft)
550 m (1804 ft)
220 m (722 ft)
275 m (902 ft)
1000Base-LX 50/125um Multimode Fiber
50/125um Multimode Fiber
62.5/125um Multimode Fiber
10u Single-mode Fiber
400
500
500
550 m (1804 ft)
550 m (1804 ft)
550 m (1804 ft)
5,000 m (16,400 ft)
100Base-TX
10Base-T
Category 5 UTP Cable (100 Mbps)
Category 3 UTP Cable (10 Mbps)
100 m (328 ft)
100 m (328 ft)
Table 1-2 AT-9108 LED
LED Color Indicates
Power Green
Yellow
The switch is powered up.
The switch is indicating a power, overheat, or fan failure.
DIAG Green
flashing:
Slow
Medium
Fast
Yellow
Power On Self Test (POST) in progress.
The switch is operating normally.
Software download in progress.
The switch has failed its POST.
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.