This modem works only with Verizon DSL and is not Compatible with Verizon FIOS;Three products in one: a full rate ADSL 2/2+ modem, 4-port switch and dual-antenna Wireless N router;Specifically designed for use with Verizon High Speed Internet Service;Rigorously tested to ensure the highest levels of compatibility and performance;Includes high-grade firewall, parental controls and a variety of protections and encryptions