Yes, a router can be used without a fiber optic cable, but it requires an alternative internet source such as Ethernet from an ONT, DSL, cable, or cellular networks.

Fiber Internet and Routers

Fiber optic internet requires an Optical Network Terminal (ONT) to convert light signals from the fiber into digital Ethernet signals that a router can use . The fiber cable itself cannot plug directly into a standard router. Once the ONT is installed, you can connect almost any compatible router to its Ethernet port to distribute internet throughout your home . Routers designed for DSL or cable inputs will not work directly with fiber without an ONT .

Alternatives to Fiber

If you do not have a fiber connection, routers can still provide internet access using other technologies:

• DSL or Cable Modems: Routers can connect to DSL or cable modems via Ethernet to access the internet .
• Cellular Modems or Mobile Hotspots: Some routers or integrated devices can use LTE or 5G networks to provide internet without any wired connection .
• Powerline Adapters or Wireless Bridges: These can extend an existing internet connection to a router without a direct cable .

Wireless Router Setup Without a Cable

You can set up a Wi-Fi network without a coaxial or Ethernet cable by using a router that supports wireless WAN connections or by connecting to a mobile hotspot. The steps generally include powering the router, accessing its configuration interface via Wi-Fi, setting up the SSID and password, and connecting devices wirelessly .

Key Considerations

• Ensure your router supports the type of internet connection you plan to use (Ethernet, DSL, cellular, or wireless WAN).
• For fiber internet, a Gigabit Ethernet WAN port is required to achieve full speeds .
• Wireless alternatives may have lower speeds or higher latency compared to wired fiber connections. In summary, while a standard fiber connection requires an ONT, routers themselves can operate without a fiber optic cable if they are connected to other internet sources such as DSL, cable, or cellular networks, or if they are configured to use wireless WAN technologies .