Table D. Troubleshooting with Rear-Panel Indicators (Continued)
Indicator Color | Meaning | Possible Cause | Corrective Action |
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Not lit | A | A problem may exist with | Do any of the following as |
| the cable: | applicable: | |
| cannot be | • Cable is not connected | • Connect the cable. |
| established. | ||
| to the module or to the | • Replace the cable. Use | |
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| ||
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| Category 5e or higher | |
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| compatible device. | cable. |
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| • Cable is defective. | • Ensure that cable is proper |
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| • Cable is not the proper | length. Cable length must |
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| cable type. | not exceed 128 feet |
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| • Cable is not the proper | (100 meters). |
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| length. |
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| Device connected to the | Power on the device |
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| module is not powered on. | connected to the module. |
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| Duplex mode setting (half- | Set the duplex mode setting |
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| duplex or | on modules to match one |
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| not match the duplex mode | another (autonegotiation or |
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| setting of the remote | forced |
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| module. | duplex). Refer to the Setting |
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| |
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| Modes of Operation section in |
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| this manual for information. |
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| Port on module is defective. | Replace the module. |
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| (Continued on next page) |
C2624M (6/07) | 27 |