Using the Adder XD150FX - SM - US KVM DVI Video Extender is easy. First, connect it to your computing hardware and the user workstation with the provided cables. Make sure the single duplex fiber cable is properly plugged in. It's a plug - and - play device, so once connected, it should start working right away. When using it, keep in mind that it has a 4KM extension distance limit for single - mode fiber. Avoid bending the fiber cable too sharply as it may affect the signal. For maintenance, keep the device in a clean and dry environment. Regularly check the cable connections to ensure they are secure. If you encounter any issues, try unplugging and plugging the cables again.