Where is the router s fiber optic cable connected

A router's fiber optic cable leads first to an Optical Network Terminal (ONT), which converts light signals from the ISP's fiber network into electrical signals for your home network.

Fiber optic internet delivers data as pulses of light through ultra-thin glass strands directly from your internet service provider (ISP) to your home, a setup often called Fiber-to-the-Home (FTTH) . The fiber cable entering your home does not connect directly to a standard router; instead, it terminates at an ONT, a device provided and installed by your ISP . The ONT serves as the demarcation point between the ISP's optical network and your home network, performing optoelectronic conversion to translate light signals into electrical signals that your router can use . Once the ONT converts the signal, it outputs data through a standard Ethernet port, which is then connected to your router via an Ethernet cable . From there, the router distributes the internet connection to your devices via Wi-Fi or additional Ethernet connections. In some setups, the ONT and router may be combined into a single device, but the principle remains the same: the fiber cable ultimately connects your home to the ISP's central hub, where your data travels through the provider's network infrastructure . In summary, the fiber optic cable from your router leads to the ONT inside or near your home, which then links to the ISP's network, enabling high-speed, low-latency internet access throughout your home .