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. This guide walks you through the complete fiber installation process, from checking availability to optimizing your Wi-Fi network. Fiber optic internet delivers blazing-fast speeds and reliable connectivity, making it a top choice for modern homes and businesses. However, setting up a fiber optic connection to your router can seem daunting if you're unfamiliar with the process. With. However, with a little knowledge and following the appropriate steps, it's possible to configure your router to take full advantage of the speed and stability of your fiber optic connection. FTTC (Fiber to the Cabinet): Fiber reaches a nearby cabinet; the last leg uses copper wire.