Internet phone is a well recognized technology. Increasing number of DSL internet connection subscribers has also increased the number of people using business phone service. VoIP is a special technology that uses a specific protocol named voice over internet protocol for sending and receiving voice communications over the internet. Most of the times traditional PSTN (Public Switched Telephone Network) struggles to provide better phone service to the subscribers. There are many terms that are used to describe the internet phone service including broadband phone, hosted IP, voice over broadband, internet telephony and IP telephony.