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While the port is transmitting or receiving data, you will see a blinking green light.
If you’ve made a connection but the Link/Rx LED does not light up as expected, you
should check whether the RJ-45 connectors are damaged, or the cable type or pin-out is not
correct, or the cable length exceeds the 100 meter limit.
FDX/Col LEDs
FDX/Col LED shows the transmission mode as well as the presence of collision on the
network.
When in full-duplex transmission mode, FDX/Col LED gives forth a solid yellow light.
When in half-duplex mode, it will be off. But, when in half-duplex mode, there are two or
more end stations on the same network segment attempting to transmit data at the same
time, a collision occurs. If there is a collision detected on specific network segment, the
corresponding FDX/Col LED shows a blinking yellow light. When a collision occurs, all
of the stations involved will recognize the collision, wait a random amount of time, and
retransmit.
FDX/Col LED status is summarized as follows:
ON : Transmission in full-duplex.
OFF: Transmission in half-duplex.
Blinking: Collision detected.
100 M LED
100M LED showing a solid red light indicates that the line speed going through that
specific 10/100 Mbps port is operating at 100Mbps mode. If the transmission speed
operates only at 10 Mbps, it is off.
A summary of the station-port LED status is listed in Table 5-1 below:
LED indicator
Color
Status
Meaning
System LEDs
Power LED
●
Green
ON
OFF
Power ON
Power OFF
Station Port LEDs
Link/Rx
●
Green ON
Blinking
OFF
Connection is made
Transmitting/Receiving
No connection is made
FDX/Col
●
Yellow ON
Blinking
OFF
Full Duplex
Collision (
in half duplex
)
Half Duplex
100M
●
Red ON
OFF
100Mbps speed
10Mbps speed
Table 5-1: LED signals
