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Troubleshooting Using the Port Status LEDs
A blinking Port Status indicator is always a sign that the port detects a potential problem. Once a port detects a problem, you can further analyze the problem by counting the number of blinks. Table
Table 4-2. Troubleshooting Using the Port Status LEDs
LED State | Indication | Possible Cause | Corrective Action | |
|
|
|
|
|
Off | Port | Port disabled. | Enable port. | |
| Disabled |
|
|
|
|
| Check concentrator | ||
|
| |||
|
| Module not | power status. | |
|
| powered. |
| |
|
|
|
|
|
|
|
|
| Reinsert |
|
|
|
| Module. |
|
|
|
| |
|
| Broken LED. | Press LED check | |
|
|
|
| button on Controller |
|
|
|
| Module. |
|
|
|
| |
|
| Bad | Replace Module. | |
|
| Module. |
| |
|
|
|
| |
1 Blink | No Light | Cables crossed. | Verify TX on remote | |
| Received |
|
| device is connected to |
|
|
|
| RX on |
|
|
|
| Module. |
|
|
|
| |
|
| Broken fiber | Check and fix RX fiber | |
|
| cable. | link. | |
|
|
|
| |
|
| Bad fiber | Clean and reconnect | |
|
| connections. | fiber (both ends). | |
|
|
|
|
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Troubleshooting 4 - 3