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Technical Assistance 4-3
Troubleshooting
With the Activity
LEDs
Under some conditions a port's Activity LED may not light. Use the
troubleshooting suggestions in Table 4-3
to help determine why this
has occurred and to isolate the source of the problem.
Technical
Assistance
You can receive assistance for installing and troubleshooting the 24-Port
module by calling your 3Com rep or 3Com Technical Support. Be
prepared to supply the following information:
■ a description of the problem
■ the steps you have taken to try to correct the problem
■ status of the front panel LEDs
■ the version of network management in use
■ hardware and software version of the 24-Port module
■ the configuration of your network
■ the configuration of your hub (you may find it helpful to refer to the
Slot Usage Chart that is shipped with the CoreBuilder 5000
Integrated System Hub Installation and Operation Guide for a record
of this information.)
Refer to Appendix B
for instructions on contacting Technical Support
for your product.
Table 4-3 Troubleshooting With the Activity LEDs
LED
State
Possible Problem Troubleshooting Solutions
Off There is no traffic received
from the segments (normal).
None.
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.
Reinsert the 24-Port module. If this fails
to correct the problem, try another hub
slot.