Xiaomi Router 3 using fiber optic cable

The Xiaomi Mi WiFi Router 3 can be used with fiber optic internet, but it must connect through an Optical Network Terminal (ONT) or a fiber modem, not directly to the fiber cable.How It WorksThe Xiaomi Mi WiFi Router 3 has an inter-WAN port designed to connect to external networks, including fiber, home gateway, or ADSL modems . However, fiber optic cables cannot be plugged directly into the router because the router does not have an SFP or fiber input port . Instead, fiber internet requires an ONT, which converts the optical signal from the fiber line into an Ethernet connection that the router can use .Step-by-Step ConnectionInstall the ONT: Your ISP typically provides an ONT. Connect the fiber optic cable from the wall outlet to the ONT and power it on .Connect the Router: Use an Ethernet cable to link the ONT's Ethernet/LAN port to the Xiaomi Router 3's WAN port (inter-WAN port), .Power On and Configure: Turn on the router, then use the Mi Router app or a web browser to access the router's admin panel and configure your network settings .Test the Connection: Ensure your devices can access the internet via Wi-Fi or Ethernet. If needed, reboot the ONT and router to resolve connectivity issues .Key ConsiderationsEnsure the router's WAN port supports the speed of your fiber plan, especially if your plan exceeds 1 Gbps .The Xiaomi Router 3 supports standard Ethernet input, so it is compatible with most ONTs provided by ISPs .Direct fiber-to-router connections are only possible with routers that have a dedicated SFP/fiber port, which the Xiaomi Router 3 does not have . In summary, the Xiaomi Mi WiFi Router 3 can be used with fiber optic internet, but it requires an ONT or fiber modem as an intermediary to convert the optical signal into Ethernet for the router's WAN port. This setup ensures full compatibility and stable internet performance.