Yes, a router can work with fiber optic internet. The router connects to a fiber optic modem or Optical. To connect your fiber optic cable to a router, ensure you have the following: Fiber optic modem (ONT): Most fiber connections require an Optical Network Terminal (ONT), provided by your ISP. 5Gbps support, stable performance under high load, and seamless integration with the Xiaomi Mi Home ecosystem for smart home management. Your internet service provider (ISP) usually supplies this. To use it, you'll need a router that supports high-speed data transfer. Here's a simple guide to help you through the process: 1.