Any standard router, including the primary unit of a mesh Wi-Fi system, will work at its full potential with any standard Internet broadband terminal device —modem, Fiber-optic ONT, or others. That's true as long as the two can connect via a network cable, which is almost. A fiber optic service will require an "ONT" which connects to the fiber cable, and provides an Ethernet port. org/wiki/Network_interface_device#Optical_network_terminals Some ISP's use ONT's that have integrated routers - its easier for THEM but it gives them more control over. The answer is actually no—fiber optic equipment differs significantly from cable setups. Your ONT handles signal conversion, eliminating the need for a traditional modem altogether. Think of the ONT as a high-tech bridge between your ISP and your internal network – but engineered specifically for fiber's unique data. While the internet connection comes in via fiber optic cable, the device that manages your home network—your router—still needs to be able to communicate with the incoming signal. Outdoor Fiber Cable section, avoid any outdoor fiber-optic cable that uses a metal protective sheath to maintain electrical isolation.