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Fast Ethernet Switching System User’s Guide
LEDs
26
12-Port 10/100-TX Module
The LEDs on the 12-Port 10/100-TX Module is displayed in Figure 12. The meaning of
the LEDs is displayed in Table 4: 12-Port 10/100-TX Module LEDs.
Figure 12: 12-Port 10/100-TX Module LEDs
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.
Duplex
The Duplex LED indicates the duplex mode the port is in. All 24 ports, and the expansion
modules, auto-negotiate the duplex mode by default. Each port can be manually set for a
particular speed and duplex mode. Off indicates the port is in half duplex mode. Green
indicates the port is in full duplex mode. 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.
Table 4: 12-Port 10/100-TX Module LEDs
LED Color Dark
Link
Orange indicates port speed is 10 Mbps
Green indicates port speed is 100 Mbps
No link or link is down
Duplex Port is working at full duplex Port is working at half duplex
Link
Duplex Mode