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Fast Ethernet Switching System User’s Guide
LEDs
29
2-Port 100BASE-FX Module
Figure 16: 2-Port 100BASE-FX Module
The LEDs on the 2-Port 100BASE-FX module, displayed in Figure 16, are different from
the LEDs on the other modules. The information given is the same but it is presented
differently. Refer to Table 6: FX Module LED for an explanation of the LEDs.
Lk
Lk means link. The Lk LED lights to indicate there is a link at the port.
Dx
Dx means duplex mode. The Dx LED indicates the port’s duplex mode. The ports will
not auto negotiate the duplex mode. The default value is half duplex. They can be
manually set for full duplex. The LED is lit when the port is in full duplex and dark when
the port is in half duplex.
Tx
Tx means transmitting. The Tx LED lights to indicate the port is transmitting data.
Rx
Rx means receiving. The Rx LED flashes when the port is receiving data.
Col
Col means collision. The Col LED lights amber when collisions occur at the port.
Collisions are normal on the network. You should only be concerned when a high
number of collisions happen at the port.