4-2
C
HAPTER
4: T
ROUBLESHOOTING
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