Gigabit Media Converter Module – Installation Guide
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Media Converters should be lit. Data should pass through the local
converter, over the fiber connection to the remote converter. At the
remote converter, the data will be looped back and passed
through the fiber, once again, to pass through the local converter
to the copper link.
Note: If troubleshooting a CM-1000, setting the Auto-Config
jumper (J6) to SW will ensure the DIP switches are being read.