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4 - 2 ONline Ethernet 24-Port 10BASE-T Module Installation Guide
Troubleshooting Using the Port Status and Port
Activity LEDs
In certain situations, the Port Status and Port Activity LEDs may not light.
This section describes troubleshooting using the:
❑ Port Status LEDs
❑ Port Activity LEDs
Troubleshooting Using the Port Status LEDs
A blinking Port Status indicator signals a problem with a port or a link
connected to a port. Once a port detects a problem, you can further
analyze the problem by counting the number of blinks. Table 4-1 provides
troubleshooting suggestions for each of the blinking sequences.
Note: LEDs provide accurate information only when unused ports
are disabled.
Table 4-1. Troubleshooting Using the Port Status LEDs
LED State Indication Possible Cause Corrective Action
1 Blink Link Failure Cable not
connected.
Connect cable.
Cable defective. Check cables with
cable tester.
Repair or replace
cables.