Do I need to switch fiber optic cables after changing the router

No, you generally do not need to replace the fiber optic cable when changing your router; the connection is handled via the ONT and an Ethernet cable.How Fiber Internet Connections WorkFiber internet uses an Optical Network Terminal (ONT) provided by your ISP to convert light signals from the fiber optic cable into electrical signals that your router can use . The fiber optic cable runs from the wall outlet to the ONT, not directly to the router. Your router then connects to the ONT using a standard Ethernet cable, typically Cat6a or higher for optimal speeds .Router Replacement ConsiderationsWhen changing your router:Check compatibility: Ensure your new router has a Gigabit Ethernet WAN port to handle the speeds provided by your fiber plan . Older routers may limit performance even if the fiber cable is intact.No need to touch the fiber cable: The fiber optic cable itself remains connected to the ONT. Only the Ethernet cable linking the ONT to the router may need to be replaced if it is damaged or not rated for high speeds .Configuration: After connecting the new router to the ONT, you may need to configure settings such as VLAN, DHCP, or PPPoE depending on your ISP .When Fiber Cables Might Be ReplacedFiber optic cables are typically replaced only due to damage, degradation, or system upgrades, not because of a router change . High-quality fiber cables can last decades under normal conditions, so routine router upgrades do not require replacing the fiber line.SummaryYou can safely replace your router without touching the fiber optic cable. Focus on ensuring your new router is fiber-compatible and capable of handling your internet plan's speeds. The ONT and Ethernet connection handle the interface between the fiber line and your router, making the fiber cable itself reusable.