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4 - 4 ONline Ethernet 24-Port 10BASE-T Module Installation Guide
Troubleshooting Using the Port Activity LEDs
Under some conditions a Port Activity LED may not light. Use the
troubleshooting suggestions in Table 4-2 to help determine why this has
occurred and to isolate the source of the problem.
Technical Assistance
Refer to Appendix B for instructions on contacting Technical Support for
your product.
Table 4-2. Troubleshooting Using the Port Activity LEDs
LED State Possible Cause Corrective Action
Off There is no traffic
received from the
segments (normal).
None.
Hub power is off. Check the Controller
Module Power LEDs.
The Activity LED has
burned out.
Press the LED test button
on the Controller Module.
A 24-Port Module port
is faulty.
Connect the cable to a
different port.
The module
connection to the
backplane is bad.
Re-insert the 24-Port
Module. If this fails to
correct the problem, try
another concentrator slot.
The 24-Port Module is
faulty.
Try a different 24-Port
Module.