3Com 3C780 User Guide - Page 119

Using Miscellaneous Commands

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Using the Hub 5-17 Table 5-10. Interpreting Media Module LEDs LED Color Indicators Signal Detect Green Port State Off Green Flashing green/off Off Link Error Amber Off Meaning The signal is detected. No signal exists. Port is in active connection state. Port is in standby connection state. Port is in disabled or connecting state. Link confidence test failure: link error rate cutoff threshold has been exceeded, triggering an alarm. Port is operating normally. In addition to the functional LEDs, each module has a power (PWR) LED, which turns green to indicate the module is on. Using Miscellaneous Commands Several commands provide diagnostic and connectivity functions. Diagnosing Network Problems The commands described in this section provide statistical information that may help solve network problems.

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5-17
Using the Hub
Table 5-10.
Interpreting Media Module LEDs
LED
Color Indicators
Meaning
Signal Detect
Green
The signal is detected.
Off
No signal exists.
Port State
Green
Port is in active connection
state.
Flashing green/off
Port is in standby connection
state.
Off
Port is in disabled or
connecting state.
Link Error
Amber
Link confidence test failure:
link error rate cutoff threshold
has been exceeded, triggering
an alarm.
Off
Port is operating normally.
In addition to the functional LEDs, each module has a power (PWR) LED,
which turns green to indicate the module is on.
Using Miscellaneous Commands
Several commands provide diagnostic and connectivity functions.
Diagnosing Network Problems
The commands described in this section provide statistical information that may
help solve network problems.