Introduction
Internet Telephony is name given to the service that allows the users to make international calls over the Internet to fixed and mobile phones at a fraction of the cost of ISD calls. You make low cost calls from PC-PC, PC to phone, IP based easy to use devices to normal phones (abroad only) as well as to other similar devices. There is no need of revamping your existing set-up you can choose from a variety of devices available to help experience the benefits of Internet Telephony. Internet Telephony is not to be confused with VOIP, which is defined by the government as the technology that is used to carry Voice over the IP network. Customers make international calls freely and are charged depending on the location called on a per minute basis.

How does it work?
The user initiates the call from his PC or an IP Phone (Even Analog Phones can be used with a VoIP Gateway) connecting to his ISP and entering the Account Id and PIN required for Internet Telephony. Once connected simply dial the number you wish to speak to and your ISP will carry the voice over its IP based Network to the Internet Telephony servers in U.S. From there, the Internet Telephony partner of your ISP will carry the voice over its managed IP based network to the PSTN or Mobile cloud to the destination to land the call.

Traditionally, phone calls have been made over a dedicated voice (TDM) network. These calls are circuit switched, which means when a call is placed; a dedicated circuit is opened to transmit voice. On the other hand, a data network is one that is packet switched. For example, when a call is placed, a source address sends data packets to a destination address. Internet Telephony utilizes a data network with VOIP as the underlying Technology. VOIP (Voice over Internet Protocol) is the technology that enables transmission of voice using Internet Protocol. Voice is broken into pieces, encoded into individual data packets and then sent over a data network. These data packets are then converted back from digital data to analog sound waves at the terminating end.