βTo troubleshoot fiber network issues, start by inspecting physical connections, testing signal strength, and verifying device functionality. Use OTDR for advanced diagnostics and resolve configuration errors to restore performance. β External Links FootnotesIn this guide, we'll walk you through a series of simple steps that can help you identify and resolve the most frequent culprits behind slow fiber internet speeds so you can get back to enjoying your online activities without interruptions. If your fiber optic internet isn't performing as well as. Sometimes I unplug the cabble from my computer and plugs it into a laptop, it makes the router recognize the laptop accepts more speed and unlock the 1Gb speeed. I'm using both cables CAT6 and CAT5e and already try to change Wan Port Speed to 1000mbps, but no success. Please help me to get more. When issues like signal loss, slow speeds, or intermittent connectivity arise, systematic troubleshooting is key. This should always be your first step. Even if your connection is only running at 100MB/s, it is likely that it can run at 1GB/s, just as you want it to run.