VoIP prospect is good, but want to really achieve its goal is unable to avoid a problem is the security of VoIP application period of relatively small, security problem has not obvious, but when the volume reaches is almost the same with the traditional phone, due to the IP to the end, in the past been avoided some of the IP network problems emerge, such as QoS, security, user management, etc., especially the security problem, can be said to be the Achilles' heel of VoIP technology, aiming at this situation, a deal, symantec, Siemens and other industry heavyweight industry manufacturers to set up the VoIP security alliance recently, in order to create a more solid foundation for the development of VoIP,
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