Connect the fiber optic cable from your ISP to the ONT (Optical Network Terminal) provided. Power on all devices and configure your router for the internet connection. This comprehensive guide combines industry standards with field-tested practices to ensure you achieve a rock-solid. Setting up a fiber internet connection requires understanding key hardware components and following a specific connection sequence to establish your home network. Fiber transmits data using light signals through glass strands, delivering faster speeds and lower latency than cable or DSL connections that rely on. If you're looking to understand how to connect fiber optic cable to router, you've come to the right place. Run an Ethernet cable from the ONT to the WAN port on your. Proper connection of fiber optic cables is essential to harness these benefits fully, as even minor errors can lead to significant performance issues like signal loss.