Which port on the router is for fiber optic cable

The router should connect to the fiber optic network via its WAN (Internet) port, typically using an Ethernet cable from an Optical Network Terminal (ONT).Step-by-Step Connection1. Fiber Optic Cable to ONT Most fiber internet setups require an Optical Network Terminal (ONT) provided by your ISP. The fiber optic cable from the wall outlet or fiber termination point plugs directly into the ONT's designated fiber input port, often labeled “Fiber” or “GPON” . Handle the fiber connector carefully, removing any dust caps and aligning the connector properly to avoid signal loss . 2. ONT to Router Once the ONT converts the optical signal into an electrical signal, use a high-quality Ethernet cable (Cat5e, Cat6, or higher) to connect the ONT's LAN or Ethernet port to your router's WAN (Internet) port . The WAN port is usually labeled and may be colored differently from the LAN ports to distinguish it. 3. Power and ConfigurationPower on the ONT first and wait for its status lights to stabilize, indicating a successful connection to the ISP network .Then power on the router and check that the WAN/Internet indicator light is active.Access the router's admin panel (commonly via 192.168.1.1 or 192.168.0.1) to enter any ISP credentials or configure settings like VLAN tagging or PPPoE if required . 4. Optional Direct Fiber-Ready Routers Some modern routers have SFP or fiber ports that allow direct fiber connection without an ONT. In such cases, the fiber cable can plug directly into the router's SFP/fiber port, but this is less common in residential setups .Key PointsAlways connect the fiber cable to the ONT first, not directly to a standard router unless it has a dedicated fiber port.The router's WAN port is the correct interface for receiving the internet signal from the ONT.Use proper Ethernet cables and ensure the ONT and router are powered in the correct sequence to establish a stable connection. Following this setup ensures your router receives the fiber optic internet signal correctly and can distribute it to your devices via Ethernet or Wi-Fi.