VoIP (Voice over Internet Protocol) in short is digital, analog Voice signal (Voice) in the form of a Data Packet (Data Packet) on IP Data Network (IP Network) real-time transmission, the biggest advantage of VoIP is that can widely use the Internet and global IP interconnection environment, provide more than the traditional business, better service, VoIP can transmit Voice cheap on IP Network, fax, video, and Data and other business, such as unified message, virtual telephone, virtual Voice/fax mail, directory service, Internet call center, Internet call management, video conferencing, electronic commerce, fax store-and-forward and all kinds of information store and forward,
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