The ADSL X5v integrates a full-rate ADSL modem, router, firewall, four-port 10/100 Ethernet switch, USB port, and VoIP phone port into a single cost-effective product.The Model 5565 has a special Local Phone port that lets you use your standard single-line phone for conventional phone calls or free and very low-cost Voice Over IP (VoIP) calls. Because the X5v integrates Internet telephony with a full featured ADSL gateway, setup is easy and system security is ensured. Integration of the voice processing with the firewall and the router ensures reliability of VoIP calls and reduces service provider support requirements. The X5v also comes with the Global Village VoIP phone service that sets up in minutes and lets you simply dial phone numbers and make free calls to devices like the X5v anywhere in the world. And because the X5v uses SIP, the most popular protocol for voice communications over the Internet, you can tap into a rapidly-growing world of free and very low-cost phone services. The X5v's built-in four-port Ethernet switch eliminates the need for a separate Ethernet hub for most home networks and many small offices. The USB port allows direct connection of a fifth computer to the ADSL X5v. By adding external hubs or a wireless access point, the X5v can provide simultaneous Internet access for up to 253 computers.The Local Phone port of the Model 5565 includes an intelligent relay that allows a single phone to place and receive both VoIP calls and calls over the Public Switched Telephone Network (PSTN). PSTN Fail-Over allows the X5v to automatically route calls over the dial-up phone network when power is lost. PSTN support also allows emergency dialing using services like 911 or 112 calling.Setup is easy using any authorized local or remote computer's Web browser and the graphical user interface built into the X5v. Flash memory allows easy firmware updates, including additions to the voice compression codecs.