Which port to plug the fiber optic cable into the router

You do not plug the fiber optic cable directly into a standard router; it should first connect to the Optical Network Terminal (ONT), and then the ONT connects to your router's WAN port via an Ethernet cable.Step 1: Connect Fiber to the ONTFiber optic internet requires an Optical Network Terminal (ONT), which converts the light signals from the fiber into electrical signals that your router can use . Plug the fiber optic cable from your wall outlet into the ONT's designated optical port, usually labeled or color-coded. Handle the fiber connector carefully, removing any protective caps and aligning the connector properly until it clicks into place .Step 2: Connect the ONT to Your RouterOnce the ONT is powered on and stabilized, use a high-quality Ethernet cable (Cat6a or higher recommended) to connect the ONT's Ethernet or LAN port to your router's WAN port. The WAN port is often labeled “WAN,” “Internet,” or sometimes “SFP” if your router supports fiber modules . This port is specifically designed to receive the external internet feed from the ONT.Step 3: Power On and ConfigurePower on the ONT first and wait for the status lights to indicate a stable connection.Power on your router and wait for its indicator lights to confirm connectivity.Access the router's admin panel via a web browser (commonly 192.168.1.1 or 192.168.0.1) to enter any ISP credentials if required and configure settings .Key NotesDo not plug the fiber cable directly into a standard router unless it has a dedicated SFP or fiber port designed for direct fiber input .Ensure the ONT and router are placed near power outlets and in a dry, ventilated area .Use the correct fiber connector type (SC/APC, SC/UPC, LC, etc.) as specified by your ISP .Following this sequence ensures your fiber optic internet connection is properly established and maximizes speed and stability.