Enterprises are showing a strong interest on wireless voice technology over the standard WiFi networks for its attractive features such as lower phone bills, centralized management, or fast deployments. However these wireless voice networks are susceptible to usual attacks like viruses, spam, phishing, hacking, stolen data, denial of service (DoS), voice injections, man in the middle attacks, call hijacking, eavesdropping etc. The security of these networks become a major concern for enterprises because IT managers have no or very little knowledge how to protect voice networks.