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Fast Ethernet Switching System User’s Guide
LEDs
26
8-Port TX Module
This section covers the LEDs on the 8-Port TX Module, displayed in Figure 14.
Figure 14: 8-Port TX Module
Link
The Link LED indicates there is a link at the port. If a cable is plugged into the port and
the Link LED is off, check the cable and connection. The default value is that all ports
auto-negotiate the proper speed and duplex mode. If the port has been manually
configured for a particular speed and duplex mode, verify that the speed and duplex mode
of the port match the speed and duplex mode of the device you are connecting to.
The color of the Link LED indicates the port’s speed. Orange indicates the port is
operating at 10 Mbps. Green indicates the port is operating at 100 Mbps.
Act
The Act (activity) LED flashes to indicate the port is transmitting and receiving data. The
LED is dark if there is no activity.
100/10
The 100/10 LED indicates the speed of the port. All 10/100-TX ports auto-negotiate the
speed by default. The ports can be manually set for a particular speed. Green indicates the
port is running at 100 Mbps.
The 100BASE-FX ports do not support 10 Mbps. The 1000BASE-SX port only supports
1000 Mbps.
Full/ Half
The Full/ Half LED indicates the duplex mode the port is in. The LED is lit when the port
is in full duplex and dark in half duplex.
Full duplex means the port is transmitting and receiving data simultaneously. Half duplex
means that data is only being transmitted or received in one direction at a time.
The LED status is summarized in Table 4: 8-Port TX Module LEDs.