3Com EtherLink III User Manual page 22

2-6 C 2: I
HAPTER
If you are experiencing any problems:
Make sure that the hub and cable comply with
10BASE-T specifications described in Appendix A
Make sure that the hub is powered up
Check the LED
To complete installation, you must install the network
driver, as described in Chapter 3.
3C509B NIC
NSTALLING THE
If the LED is on, the connection is active.
If the LED is off, something is preventing the
connection between the NIC and the hub.
If the LED is blinking, the 10BASE-T cable polarity
is reversed. Try a different twisted-pair (TP) cable or
contact your MIS representative.