3Com 10/100BASE-T4 manual LEDs, Led

4-10 CHAPTER 4: PERFORMING TROUBLESHOOTING AND DIAGNOSTIC TESTS

Check the length and rating of the UTP cable connection. Make sure the cable segment is compliant with 10BASE-T or 100BASE-T4 specifications. Maximum length for all types of cabling for this adapter is 100 meters (330 feet).

Make sure that you have installed the correct driver for the network operating system you are running (refer to Chapter 3,“Loading the Network Drivers”).

If any problem persists, refer to Appendix D, “Technical

Support.”

LEDs

Each 10/100BASE-T4 PCI adapter has three LEDs, as shown in Figure 1-1 and described in Table 4-2.

The adapter must be physically connected to the network and network drivers must be loaded for the LEDs to work.

Table 4-2 Fast EtherLink 10/100BASE-T4 PCI Adapter LEDs

LED	Description	Flashing	Steady	Off
10 LNK	Green:	Reversed cable	Good 10BASE-T	No connection between
	Shows link	polarity	connection between	adapter and hub
	integrity		adapter and hub
100 LNK	Green:	Not applicable	Good 100BASE-T4	No connection between
	Shows link		connection between	adapter and hub
	integrity		adapter and hub
ACT	Yellow:	Network traffic	Not applicable	No traffic
	Indicates port	present
	traffic for
	either speed

If you experience any problems, first make sure that the appropriate driver is loaded, that the proper cable is connected to the adapter port, and that the hub complies with the adapter specifications (10 Mbps 10BASE-T or 100 Mbps 100BASE-T4). Then recheck the LED.