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Troubleshooting 4 - 5
Troubleshooting With the Activity LEDs
There may be situations where a port's Activity LED may not light. Use the
troubleshooting suggestions in Table 4-2 to help isolate why this has
occurred.
Table 4-2. Troubleshooting With the Port Activity LEDs
LED Name
LED
State
Possible Problem
Troubleshooting
Solutions
Activity
(Ports 1 - 8)
Off There is no traffic
received from the
segment (normal)
None.
The port is disabled Check the port enable dip
switch setting.
The power is off Check the Controller
Module Power LEDs.
The Activity LED has
burnt out
Press the LED/Channel
Check button on the
Controller Module.
The 10BASE-T
Module port is
faulty
Connect the cable to a
different port.
The module
connection to the
backplane is bad
Reinsert the 10BASE-T
Module. If this fails, try
another concentrator slot.
The 10BASE-T
Module is faulty
Try a different 10BASE-T
Module.