8
2.3.1 System LEDs
System LED indicators are located on the front panel for showing the
operating status of the whole device.
2.3.1.1 Power LED
This indicator lights green when the hub is receiving power; otherwise, it is
off.
2.3.2 10/100 Port LEDs
10/100 Port LED indicators are located on the front panel for showing the
operating status of each 10/100 Mbps port.
2.3.2.1 Speed/Link/Act LED
Every port has a Speed/Link/Activity LED. Steady light (link state)
indicated that the port has good linkage to its associated device. Flashing
indicates there is traffic transverses the port. The following is table for LED
definition.
If the port is connected but the Speed/Link/Activity LED is dark, check the
following items:
1. The switching hub and the connected device’s power are on or not
2. The port’s cable is firmly seated in its connectors in the switching hub and in
the associated device.
3. The connecting cable is good and with correct type
4. The connecting device, including any network adapter is functioning.
2.3.2.2 FDX/COL LED
A collision occurs when two stations within a collision domain attempt to
transmit data at the same time. Intermittent flashing amber of the collision LED
is normal; the contending adapters resolve each collision by means of a
wait-then-retransmit algorithm. Frequency of collisions is an indicator of heavy
traffic on the network.
If the FDX/COL light amber which means the port is under full-duplex
operation or dark for half-duplex mode.
