Future of VoIP
If we are to considered ourselves as the business aiming at profit increase and progressing growth , thus delivering better quality services to our customers, we have to think about our operational cost and the ways of reducing it. One such way is the implementation of Voice over Internet Protocol ( VOIP ), also known as the internet telephony. VOIP has become more popular in recent years as companies need to cut costs and improve communication between increasingly mobile employees and increasingly global customers.
The first Voice over Internet Protocol (VoIP) call was made back in 1995 between two PCs. Initially, this was just a technological novelty. However, by 1998, VoIP had already begun
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There are a number of ways to compress audio, the algorithm for which is referred to as a "compressor/de-compressor", or simply CODEC. Many CODECs exist for a variety of applications (e.g., movies and sound recordings) and, for VoIP, the CODECs are optimized for compressing voice, which significantly reduce the bandwidth used compared to an uncompressed audio stream. Speech CODECs are optimized to improve spoken words at the expense of sounds outside the frequency range of human speech. Recorded music and other sounds do not generally sound very good when passed through a speech CODEC, but that is perfectly OK for the task at hand. Once the sound is recorded by the computer and compressed into very small samples, the samples are collected together into larger chunks and placed into data packets for transmission over the IP network. This process is referred to packetization. Generally, a single IP packet will contain 10 or more milliseconds of audio. Vint Cerf, who is often called the Father of the Internet, once explained packets in a way that is very easy to understand. Paraphrasing his description, he suggested to think of a packet as a postcards sent via postal mail. A postcard contains just a limited amount of information. To deliver a very long message, one must send a lot of postcards. Of course, the post office might