If the LED is not lit up, there must be something wrong and please
reference to Chapter 4 for quick trouble shooting.
Figure 2-4 Connecting to computers
2.3 LEDs interface overview
You can observe the LEDs status to see if the hub works fine. The
meanings of LEDs are summarized as Table 2-1.
LEDs
Color
Blink Indication
Description
System Power
Green
Power
on
Power is on and works normally.
Indicators
FAN Err.
Yellow Blink Fan Error
Fan inside is work abnormal.
Yellow
Fan Fail
Fan inside is fail.
10 Collision
Yellow
10 Collision
Collision in 10 Mbps segment
100 Collision Yellow
100 Collision Collision in 100 Mbps segment
10 Utilization Green/
Utilization
Utilization ratio in 10 Mbps
Yellow
ratio
segment
100 Utilization
Green/
Utilization
Utilization ratio in 100 Mbps
Yellow
ratio
segment
Master
Green
Master
Bridge function disabled 8/12
Slave
Green
Slave
Bridge function enabled 8/12
Port
Link/REC
Green
Link
Port is linked.
Indicators
Green Blink Receiving
Receiving data in this port
100
Green
100 Mbps
Run in 100 Mbps
Dark
10 Mbps
Run in 10 Mbps
Table 2-1 LEDs definition
4
update ALH-316_324UM.qxd 11/10/99 8:42 AM ›¶›– 4
