226APPENDIX D: TROUBLESHOOTING
Problems | Possible Cause | Solution |
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No connection and the | Incorrect ethernet cable, | Check pinout and replace if necessary |
port LED is off | e.g., crossed rather than |
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| straight cable, or vice |
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| versa, split pair (incorrect |
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| twisting of pairs) |
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| Fiber optical cable | Change if necessary. Check Rx and Tx on fiber optic |
| connection is reversed | |
| cable | |
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| Bad cable | Replace with a tested cable |
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| Wrong cable type | Verify that all 10 Mbps connections use a Cat 5 cable |
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| Check the port LED or zoom screen in the NMS |
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| application, and change setting if necessary |
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Lost Password |
| Contact 3Com |
