4-2 CHAPTER 4: TROUBLESHOOTING
Figure 4-1 LEDs
3Com NIC Diagnostics Program
Use the 3Com NIC Diagnostics program for Windows 95
and Windows NT to test the 3C905B-TX NIC and change
configuration. To change the NIC’s configuration, see
Chapter 5. If you are running NetWare Client 32 with the
NetWare ODI driver, use the DOS diagnostic program
described in the INSTRUCT.TXT file in the HELP directory on
EtherDisk Diskette #1.
The 3Com NIC Diagnostics program is installed with the
driver. Driver installation is described in Chapter 3. You must
install the driver before you run the program.
DATA
TX
ACT
10
100
L
N
K
RJ-45 port
ACT LED
10 LNK LED
100 LNK LED
Table 4-1 LED Descriptions
LED Description Flashing Steady Off
10 LNK Green:
Link integrity Reversed
polarity Good 10BASE-T
connection between
NIC and hub
No connection
between NIC
and hub
100 LNK Green:
Link integrity Reversed
polarity Good 100BASE-TX
connection between
NIC and hub
No connection
between NIC
and hub
ACT Yellow:
Port traffic for
either speed
Network traffic
present Heavy network
traffic No traffic
Book Page 2 Thursday, April 2, 1998 9:28 AM