If you recently replaced or reconfigured your router, you will need to reset the Brother machine and connect it to your new network. You may also need to uninstall and reinstall the MFL-Pro software and drivers on each computer on your network to restore printing and scanning. Fiber internet uses fiber optic cables instead of coaxial cables or metal wires to transmit data. Unlike traditional cable internet, which relies on electrical signals, fiber optics transmits data using light signals through thin glass or plastic strands. For the purpose of this wikiHow, we will refer to the router that's connected to the modem as “Router 1.