If your ISP doesn't require a technician to set up your connection, these are the steps to self-install fiber internet: Locate your fiber network terminal. In this guide, we'll walk you through how to connect a fiber optic cable to a router safely and efficiently. Why Use Fiber Optic Internet? Before diving into the setup, let's quickly. The process to connect fiber optic cable to router requires careful attention to detail, but I'll walk you through every critical step with the precision and clarity you deserve. Connect your device to the network box.