Voice over Internet Protocol (VOIP) is a methodology, which uses various data and voice transfer technologies such as IP telephony, voice over broadband and Internet telephony to provide communication services over a packet-switched network. VoIP services require conversion of voice signals into digital signals, which are then carried over the IP-based network. Calls can be made from regular telephones, VoIP phones, computersand mobile phones. VoIP services are implemented using various protocols such as H
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