A Wi-Fi phone lets you make Internet phone calls on a wireless network. A Dual Mode phone lets you make Internet phone calls on your Wi-Fi network or using your cellular provider.A Telephone Adapter converts your standard phone so that it can access other phones using the Internet. This allows you to make VoIP calls on your regular home phone at reduced fees.A router allows you to network multiple computers and share broadband Internet access and other resources such as files, printers and storage.An adapter allows your PC to connect to a network by cable or Wi-Fi.