An Overview of IP Voice

Learn the basic networking concepts of IP voice for business and home

The ability to place and receive phone calls over the Internet Protocol is commonly called IP voice. It’s also identified by the underlying protocol known as VOIP (voice over the Internet Protocol) or its signaling protocol – SIP (session initiation protocol). Often the terms SIP and VOIP are combined as SIP VOIP to represent IP voice. IP voice technology leverages the versatility and global presence of the Internet. Though IP voice has been around for over a decade, it has undergone several evolutions since its inception. Despite the excellence of early-day core and edge technology by the likes of Cisco, Nortel and Avaya, the Internet of ten years ago was not quite ready to transmit voice because it was engineered mainly for computers, not people, to talk to each other. Since then, the Internet has been reconfigured for voice, and technology has been refined to the extent that the user experience of VOIP is as good as traditional business phone lines. Moreover, the inherent flexibility, mobility, scalability, and economies of VOIP technology have made it the technology of choice for millions of businesses and consumers worldwide.

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