Allied Telesis AT-GS903SX - Manual (Page 13)

AT-GS903SX Installation Guide
3
LEDs
Table 1 describes the switch LEDs. Refer to Figure 3 for the labels for the LEDs
for the two types of ports.
Table 1 AT-GS903SX LED Indicators
LED Color Indicates
Power Green On The switch is powered up and ready for use.
Off The switch is powered off.
Gigabit Ethernet Port Status LEDs
Link Green On Link is present; port is enabled; full-duplex operation.
Off Link is not present.
Activity Green Flashing Packets are being transmitted/received on this port.
Off No activity on this port.
10/100Mbps Port Status LEDs
Ful/Col Yellow On Full-duplex mode.
Off Half-duplex mode.
Yellow Flashing Two or more devices attempted to transmit data at the same
time. (Typical under Ethernet CSMA/CD.)
Link/ Yellow On 100M Link is present; port is enabled.
Act Yellow Flashing 100M Packets are being transmitted/received on this port.
Green On 10M Link is present; port is enabled.
Green Flashing 100M Packets are being transmitted/received on this port.
Off Link is not present.