The POE-EXT3001LP must be used together with a PoE device.
If your device is non-PoE, the connection and extension will not work. You need to activate this PoE Extender by connecting a standard PoE device first.
If you plan to pair two POE-EXT3001LP units to achieve UltraReach (800 m), make sure that the INPUT (green port) of each POE-EXT3001LP is properly connected to eachother; otherwise, the extension distance will not reach the rated value.