NetTool
Users Manual
1-6
Understanding the LEDs
On each side of the LCD, NetTool has a pair of LED
indicators (Figure 1-3). These LEDs combine to give you
immediate insight and at-a-glance information about your
network environment. The top pair of LEDs provides link,
collision, and error information while the bottom pair
indicates utilization levels.
Link, Collision
and Error LED
Link, Collision
and Error LED
LED
Utilization
LED
Utilization
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Figure 1-3. NetTool LEDs
Link/Collision/Error LED
A tri-colored LED with these states:
• Green: a link pulse is present.
• Yellow: collisions are occurring.
• Red: errors (for example, FCS and jabbers) are
being detected.
Utilization LED
A tri-colored LED, with each color representing the
following ranges of utilization:
• Green: network utilization levels are below 40 %.
• Yellow: network utilization levels are between 40 %
and 70 %.
• Red: network utilization levels are greater than 70 %.
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