Chances are that you have already made a VoIP call without even realizing it. The major phone companies already use VoIP to route thousands of long distance calls through a circuit switch and into an IP gateway. This is then received by a gateway at the other end and then routed to another local circuit switch. More and more companies are installing VoIP phone systems, and the technology will grow and grow until it finds its way into every business and household across the globe.