VoIP Vocaltec proposed in 1995, because the QoS (Quality of service) not be desired, Internet phone Quality is a big question, make its development of the former, two years is considered to be a toy, but starting in 1997, VoIP turnaround, began to be regarded as a new (industry), from toys to industry, is the largest watershed in the industry have been through the control of the Quality of the network environment to control the Internet phone, though the cheapest is the most attractive feature of VoIP, but traditional phone price cut space is big, the price will be more and more small, so the biggest attraction is on the application of VoIP future develops,
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