3Com 3CSOHO100 Interpreting the LEDs, See in for a picture of the LEDs, explains the LED states

36CHAPTER 4: TROUBLESHOOTING INSTALLATION PROBLEMS

Interpreting the LEDs

The OfficeConnect NIC has three light-emitting diodes (LEDs) that can help indicate when there are problems with your network connection.

See Figure 2 in Chapter 1 for a picture of the LEDs.

Table 4 explains the LED states.

Table 4 LED Descriptions

LED	State	Meaning
10 LNK	On	If the network driver is installed, as described in Chapter 3,
(link)		the connection to the 10BASE-T Ethernet network is active.
		If the driver is not installed, the NIC is receiving power.
	Off	Something is preventing the connection between the NIC
		and the network. See the troubleshooting steps following
		this table.
	Blinking	The cable polarity is reversed. Try a different
		network cable.

100 LNK On (link)

Off

If the network driver is installed, as described in Chapter 3, the connection to the 100BASE-TX Fast Ethernet network is active.

If the driver is not installed, the NIC is receiving power.

Something is preventing the connection between the NIC and the network. See the troubleshooting steps following this table.

ACT	Flashing	Network traffic is present.
(activity)
	Steady	Heavy network traffic is present.
	Off	No network traffic is present.

If the LNK (10 LNK or 100 LNK) LED is off and the PC is powered on and the network cable is connected, check the following:

1Ensure that the network hub or device to which the NIC is connected and the cable connecting to your NIC comply with the 10BASE-T or 100BASE-TX specifications.

2Ensure that the network hub or device to which the NIC is connected is powered on.