What is Session Initiation Protocol (SIP)

Voice over IP (VoIP) is the convergence of Internet technology and mobile telephones that offers low-cost voice communication services. It is still in its infancy but has a potential to be adopted by masses in the future, as the technology matures. VoIP is a technology that is used to make telephone calls using a broadband internet connection instead of a regular phone line. There are some services that allow the users to make calls to other people with the same service; other services allow the user to make calls to any number (FCC Web site). VoIP traffic can be deployed on any IP network. It also includes the ones not having connection with the rest of the Internet such as local area network (LAN) (Wikepedia.org).