To set up your router for fiber internet quickly, connect the router to your fiber modem, access the router's settings via a web browser, and input the provided ISP credentials. Make sure to update the firmware, configure Wi-Fi security, and customize your network name for optimal performance. However, setting up a fiber optic connection to your router can seem daunting if you're unfamiliar with the process. After setup, the technician. Fiber to Ethernet media converters adapt between a typical RJ-45 copper Ethernet cable and fiber-optic cable. However, if you're not accustomed to some of the jargon, like MAC cloning and PPPoE, you may encounter a few.