Is it normal for the router to have no internet connection and the fiber optic cable to be disconnected

Yes, a router can be disconnected from fiber optic internet, but doing so will temporarily stop your internet connection and requires careful handling of the fiber components.How Disconnection WorksFiber optic internet typically enters your home through an Optical Network Terminal (ONT), which converts light signals into electrical signals for your router. Disconnecting the router from the ONT or turning it off will cut off internet access, but it does not damage the fiber line itself . You can safely unplug the router for short periods, such as during home renovations or maintenance, though extended disconnection may prevent the router from receiving software updates .Handling Fiber Optic CablesFiber optic cables are delicate and transmit data as light pulses. When disconnecting, follow these precautions:Power down the router and ONT to avoid laser exposure .Gently remove connectors along their axis without twisting or bending the cable .Cap exposed connectors to prevent dust contamination .Avoid letting the fiber cable hang loosely, as it can be damaged or contaminated .Using Your Existing RouterIf your router has a WAN Ethernet port, it can usually connect to the ONT via an Ethernet cable. Disconnecting this cable stops internet service but does not harm the router or fiber network . Ensure your router supports the speeds provided by your fiber service to maintain optimal performance when reconnected.When to Seek Professional HelpIf connectors are stuck, damaged, or recessed, or if you are unsure about safely handling the fiber, contact your ISP or a certified technician to avoid costly repairs or service interruptions . In summary, you can disconnect a router from fiber optic internet safely, but always handle the fiber cable carefully, power down devices first, and cap connectors to maintain service quality and prevent damage.