Router Connection: Begin by inserting the fiber cable into the router. Testing the Connection: Once connected, test the connection to ensure no immediate. 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. The fiber line terminates at the Optical Network Terminal (ONT), which is typically supplied and installed by the internet service provider. This specialized equipment serves as the. There are endless ways to configure a fiber-optic network, but here are a few simple ways to add fiber to your existing network.