7
2.3.1.4 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
LED is normal; the contending adapters resolve each collision by
means of a wait-then-retransmit algorithm. Frequency of collisions is a
message of heavy traffic on the network.
If the FDX/COL lights amber which means the port is under full-duplex
operation or dark for half-duplex mode.
The following table is a summary of LEDs.
LED
Status
Operation
Steady Green
Power is on
Power
Off Power
is
off
Steady Green
Connected as 100Mbps
100M
Off
Connected as 10Mbps
Steady Green
The port is connected
Blinking Green
The port is transmitting/receiving data.
Link/Act
Off No
connection
Steady Amber
Full-duplex mode
Blinking Amber
Collision
FDX/COL
Off Half-duplex
mode
