The Issue:

When it comes to VOIP security, most IT leaders have worried more about threats to the underlying data network than about potential attacks against VOIP systems themselves. Many IT managers see their VOIP networks as closed systems, protected from the outside world by the PSTN (public switched telephone network). So long as there was no way to reach their IP-PBXs via the public Internet or other outside networks, there is little threat of attack or compromise that could lead to data loss or service disruption. And by and large their views have been reinforced by the lack of attacks against VOIP servers,phones, gateways, and management systems. Less than 2% of enterprises had experienced a security incident directly involving their VOIP systems, while 96%had no known attacks.

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Clients: VOIP Security [1]

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