3Com XL PCI 10 - Manual (Page 18)

1-8 C HAPTER 1: I NSTALLING THE N ETWORK I NTERFACE C ARD
Interpreting the Link LED
The 3C900B NICs have one light-emitting diode (LED).
When the LED is on (but before the driver is loaded), the
LED indicates that the NIC is receiving power.
Other than indicating that the NIC is receiving power, the
LED serves no other purpose for either an AUI or a BNC
media connection. Table 1-2 explains the LED states for
3C900B NICs.
If the NIC LED indicates a problem, check the following:
1 Ensure that your network hub and the network cable
connecting to your 3C900B NIC comply with the
10BASE-T specifications.
2 Ensure that the hub is powered on.
You have completed the hardware installation.
The next step is to install the network driver. Go to the
next chapter.
Table 1-2 LED Interpretation
Connector
LED
State
Meaning RJ-45 AUI BNC
On If drivers are installed, the
connection is active. Yes N/A N/A
If drivers are not installed, the
NIC is receiving power. Yes Yes Yes
Off Something is preventing the
connection between the NIC
and the hub. Yes N/A N/A
Blinking The cable polarity is reversed.
Try a different network cable or
contact your MIS representative. Yes N/A N/A