Restarting your router is one of the easiest ways to resolve minor internet speed issues. Often, these devices just need a fresh reboot to clear out temporary glitches and restore your connection to full speed. Fiber can improve the connection coming into your home, but it can't automatically fix what happens after that signal reaches your router, your Wi-Fi, or, ultimately, whichever devices you want to use. Why Do Fiber Networks Fail? Despite their robustness, fiber networks can fail due to:. My internet (fiber to the curb) has been dropping out intermittently, from once to multiple times a day. I've replaced the lan cable from the. Is your router plugged directly into the ONT? Or is there a ISP provided “modem”/router in between your router and the ONT? Are you DHCP, Static IP, PPPoE? Can you direct connect 1 computer to the ONT for a while and see if it continues? Or use the ISP supplied router for a bit? Ether can eliminate. We upgraded to Sky full fibre at the end of December with high hopes of better speeds across our devices. To paint an accurate picture, our house is of newish construction, no convoluted layout and our previous sky broadband setup whilst speeds were not amazing had very little connectivity. When your fiber optic network stops working, begin with a structured approach. Many fiber internet problems come from dirty connectors or loose plugs, not major faults.