The router can be plugged into the fiber optic port

A standard router cannot be plugged directly into a fiber optic port; an Optical Network Terminal (ONT) is required to convert the fiber signal into a format the router can use.Why a Router Cannot Connect DirectlyFiber optic cables transmit data as light signals, which standard routers cannot interpret directly. The optical signal must first be converted into an electrical signal compatible with Ethernet ports on routers. This conversion is performed by an Optical Network Terminal (ONT), typically provided and installed by your Internet Service Provider (ISP) near the point where the fiber enters your home .How to Connect Fiber Internet to a RouterInstall the ONT: Connect the incoming fiber optic cable from your ISP to the ONT's optical port. Ensure the connection is clean and secure to prevent signal loss .Connect the ONT to the Router: Use a high-quality Ethernet cable (Cat6a or higher) to link the ONT's Ethernet output to the router's WAN port. This port is usually labeled and may be colored differently from LAN ports .Power and Configure: Power on the ONT first, wait for it to establish a connection with the ISP, then power on the router. Configure the router settings as needed, including VLAN, DHCP, or PPPoE credentials if required by your ISP .Special CasesSome modern routers have SFP (Small Form-factor Pluggable) ports or are labeled as “fiber-ready,” allowing direct fiber connections without a separate ONT. However, these are less common in typical home setups, and most users will still rely on an ONT .RecommendationsEnsure your router supports gigabit speeds or higher to fully utilize fiber internet.Use high-quality Ethernet cables to maintain optimal performance.Place the ONT and router in a dry, ventilated area near power outlets.Verify that your ISP has activated the fiber service before troubleshooting connectivity issues . In summary, for most home fiber installations, the fiber optic cable connects to the ONT, and the router connects to the ONT via Ethernet. Direct connection to a standard router is only possible if the router has a dedicated fiber port.