1. Introduction-18
1.3.2 LED Display
LEDs
State
Indication
Steady
Power on
Power
(Green)
Off
Power off
On
A valid network connection
established.
LNK stands for LINK.
LNK/ACT
(Port
number)
(Green)
Flashing
Transmitting or receiving data.
ACT stands for ACTIVITY.
On
100M mode
100M
(Green)
Off
10M mode
On
Connection in full duplex mode.
FDX stands for FULL-DUPLEX.
Flashing
Collision occurred.
COL stands for COLLISION.
FDX/COL
(Yellow)
Off
Connection in half-duplex mode.
On
Fiber module connected
F1, F2
(Orange)
Off
No Fiber module connected