Introduction and Use of Internet Phone
Internet phone service (VoIP) is a strikingly different kind of technology as compared with the traditional telephon. Earlier, landline phone relied on copper wires and analog signals for voice communication. Since then, there have been tremendous advancements in telecommunication technology and the present day phones use the latest internet technology for both incoming and outgoing [...]Source: http://www.miscreviews2011.com/introduction-and-use-of-internet-phone/