What is a wireless network extender?
FiOS Wi-Fi Network Extender
The FiOS Network Extender is a wireless network adapter that extends the reach and potential of your FiOS home or office wireless network. By leveraging the ubiquity of coaxial cabling within the home or business, the FiOS Network Extender creates a wireless access point anywhere there’s coaxial connection, expanding the reach of the existing wireless network. The device receives the wireless signal from your current router and rebroadcasts the signal so it can reach areas of your home beyond the reach of the router alone.
Before purchasing a network extender, you may want to check your router's location to ensure you aren't limiting its range by its proximity to walls or other barriers to the signals.