6
T
ROUBLESHOOTING
This chapter describes how to isolate and solve
3C359B NIC hardware and network cabling problems.
3C359B NIC LEDs
Light-emitting diodes (LEDs) on the backplate of the
3C359B NIC, shown in Figure 21, indicate the configured
ring speed and whether or not the 3C359B NIC is inserted
into the ring. The LEDs also light when drivers are loading
and when the diagnostics program is running.
Figure 21
NIC LEDs
When the green LED (labeled “4”) is lit, it indicates that the
3C359B NIC is set to 4 Mbps speed and is correctly
inserted into the token ring network.
When the yellow LED (labeled “16”) is lit, it indicates that
the 3C359B NIC is set to 16 Mbps and is correctly inserted
into the token ring network.
4
16
Data
4 Mbps
16 Mbps
