Understand what the indicator light of the fiber media converter means? 1000M-when it is on, it means 1000M speed 100M-when it is on, it represents 100M speed FX/Act-when it is on, it means that the pigtail has been connected, and when it is flashing, it means that data is. Understand what the indicator light of the fiber media converter means? 1000M-when it is on, it means 1000M speed 100M-when it is on, it represents 100M speed FX/Act-when it is on, it means that the pigtail has been connected, and when it is flashing, it means that data is. Fiber media converters are critical devices in network setups, bridging copper cables and fiber optics. They use LED lights to visually display the device's operational status and link conditions. Therefore, it's essential to understand these indicator lights when using them. 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. Steady on: The fiber link is connected correctly. When the connection does not work as expected after we set it up according to the Installation Guide, we need to do some troubleshooting.