Table B. Troubleshooting
Indicator Color | Meaning | Possible Cause | Corrective Action |
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| TX Optical Link Loss |
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Flashing red | Laser has shut down. | Transmitter is operating in extreme | Ensure that transmitter operates |
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| environmental conditions; for example, | according to recommended operating |
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| operating temperature is below or | conditions, and then cycle the power. |
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| above recommended range (refer to | If problem persists, contact |
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| Specifications on page 17). | Product Support at |
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| Laser has reached end of life. | Cycle the power. If problem persists, |
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| contact Product Support at |
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| RX Optical Link Loss |
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Red | The optical signal is not | Power is not being applied to the | Check power connections. Replace |
| being received from the | transmitter. | power supply if necessary. |
| transmitter. |
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| Fiber optic cable is not connected. | Check fiber optic connections. | |
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| Fiber optic cable connectors are dirty | Clean, polish, or replace fiber optic |
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| or are damaged. | cable connectors as necessary. |
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| Fiber optic cable is defective. | Replace cable. |
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| Optical dB losses in the fiber optic | Check for problems with the fiber |
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| installation exceed the optical power | optic installation, for example, |
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| budget specification (refer to | excessive dB losses in connectors, |
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| Specifications on page 17). | splices, patch panels, cables, |
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| and so on. |
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| Optical dB losses in the fiber optic | Contact Product Support at |
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| installation meet the optical power | |
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| budget specification (refer to |
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| Specifications on page 17); however, |
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| the receiver may be defective. |
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16 | C2652M (1/08) |