The term VoIP refers to Voice over Internet Protocol, a digital communication technology used to make telephone calls via the Internet. VoIP users can call from PC to PC, from PC to Telephone, from phone to PC and from phone to phone using the Internet connection lines. The VoIP user can get better call service in lesser prices especially in making international calls.
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In the VoIP technology, the analog voice is converted into digital format and transmitted onto the Internet in the form of data packets and at the end point the process is reversed. VoIP systems make use of session control protocols to control the set-up and tear-down of calls. The audio codecs encode speech that allows transmission over an IP network as digital audio via an audio stream.
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