Most people are familiar w/ NetMeeting and other software that let you talk to others over the internet. VOIP is similar. However, it also uses your phone - the interface we're all familiar with. Instead of connecting your phone to the wall, you connect it to a box either the VOIP company provides or you buy on your own. This is the modem. You need highspeed/broadband internet for this. Your modem plugs into your cable/dsl modem and now it can 'talk' btwn your phone and the internet. Your phone lines already do pretty much what VOIP does, just w/ different/older technology (well, some of it's new w/ optics and such, but...). How hard is it to setup? It's actually very easy. Assuming you have the company send you a modem or you buy a kit at the store, you simply... [What Is Voip]