IBM EtherLink XL User Manual page 45

The 3C905B-TX adapter has three status LEDs, as shown in
Figure B-1 and described in Table B-1.
Figure B-1 LEDs
Table B-1 LED Descriptions
LED Description
10 LNK Green:
Link integrity
100 LNK Green:
Link integrity
ACT Yellow:
Port traffic for
either speed
T X
RJ-45 port
D A T A
ACT LED
A C T
10 LNK LED
1 0
L
N
1 0 0
100 LNK LED
K
Flashing
Reversed
polarity
Reversed
polarity
Network traffic
present
Status LEDs
Steady
Good 10BASE-T
connection between
adapter and hub
Good 100BASE-TX
connection between
adapter and hub
Heavy network
traffic
B-5
Off
No connection
between
adapter
and hub
No connection
between
adapter
and hub
No traffic