Will I need to buy a new router? Possibly yes. You might find that your current router is not compatible with fiber internet speeds, so you'll need a model that can deliver the 'fiber goods. 'Switching to Fiber optic from cable, what do I need to know? I'm considering switching from my cable internet provider to a Fiber optic instead. I've never researched or came into contact with fiber, so one of my first questions are : Do fiber optic connections use different modems than cable? Are. Do I require a new router, which comes with all the complications or is it just a cable connection to existing router? What's this? 28 Jan 2025 01:11 PM Posted by a Superuser, not a Sky employee. In this guide, we'll explain router compatibility, setup steps and whether upgrading your router is necessary to maximize fiber speeds.