How to fix Allied Telesis AT-MMC6005 Media Converter SYS LED off?
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Robert HansonAug 2, 2025
If the SYS LED on your Allied Telesis Media Converter is off, it indicates the unit isn't receiving power. Here's what you should do:
* Ensure the power cord is properly connected to both the power source and the DC connector on the back of the media converter.
* Test the power outlet by plugging in another device to confirm it's working.
* Try a different power adapter of the same type that came with your media converter.
* Check that the voltage from the power source matches the required levels for your region.
If these steps don't resolve the issue, try power cycling the unit. If the problem persists, return the unit to Allied Telesis.
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Dylan GonzalezAug 22, 2025
What to do if Allied Telesis AT-MMC6005 DSL LED is off?
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David MitchellAug 22, 2025
If the DSL LED on your Allied Telesis Media Converter is off, it indicates that the DSL subsystem has stopped responding. You can try to resolve this by power cycling the media converter. Also, check the copper connection. Note that the DSL LED will turn off if the local unit has SML enabled, and the copper connection is lost.
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Penny LaneNov 11, 2025
What to do if Allied Telesis AT-MMC6005 COPPER P1 L/A LED is off?
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Rita WilsonNov 11, 2025
If the twisted-pair port's COPPER P1 L/A LED is off on your Allied Telesis Media Converter, it means a link to the end node couldn't be established. To resolve this:
1. Make sure the end node connected to the twisted-pair port is powered on and functioning correctly.
2. Check that the twisted-pair cable is securely plugged into both the media converter and the remote end node.
3. Confirm that you're using the correct twisted-pair cable for the port.
4. Try connecting a different end node with a different cable to see if a link can be established. If it works, the issue is with the original cable or end node.
5. Ensure the twisted-pair cable is shorter than 100 meters (328 feet).
6. Verify the end node is set to Auto-Negotiate.
7. Use the appropriate category of twisted-pair cable: ...