In its infancy, it took a lot of money and technological wizardry to make voice calls over the internet work efficiently. Cost effectiveness was largely dependent on a substantial phone bill. (For more details see the FAQs at the end of this article.) That meant VoIP was only financially viable for large businesses. But VoIP technology has developed rapidly and these days it makes sense for businesses that want to cut their phone bills or that want to get more from their phone technology.