For a fiber optic connection, you need an optical network terminal (ONT), a router, and appropriate Ethernet connections for wired devices. Your service provider typically supplies the ONT, but you may need to purchase enterprise-grade routers and switches for business. To connect your fiber optic cable to a router, ensure you have the following: Fiber optic modem (ONT): Most fiber connections require an Optical Network Terminal (ONT), provided by your ISP. The ONT is linked to your router or gateway using an Ethernet cable. The technician powers, tests, and activates the connection to confirm full speed and signal quality. Once you understand the basic concepts, you can check out my Recommended Equipment section toward the bottom of the.