To set up your router for fiber internet quickly, connect the router to your fiber modem, access the router's settings via a web browser, and input the provided ISP credentials. Low latency for. The optical network terminal (ONT) is the critical component that converts fiber optic signals into data your devices can use. Once you understand the basic concepts, you can check out my Recommended Equipment section toward the bottom of the. Learning how to connect fiber optic cable to a router can be a bit of a process but with the right tools and materials, it can be a seamless process. Make sure to update the firmware, configure Wi-Fi security, and customize your network name for optimal performance.