How to read the indicator lights on a fiber optic switch
The LEDs have three possible states: no light, a steady light, and a flashing light. The following table describes the LED indicators when two power supplies modules are installed in the switch. When the SFP-DD LED blinks white one time, it shows the status of the first port of the SFP-DD. What does each indicator mean? Does all the indicators light up to indicate that the fiber media converter is working normally? 1000M:Lit when the electrical link speed is 1000Mbps.
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