How to Secure VOIP

The time to secure VOIP traffic is now, before the threats outweigh the benefits of this cost-saving communications technology.The technology offers a host of benefits, from lower calling costs and greater mobility to advanced functions like unified messaging and collaborative whiteboarding. But as VOIP matures, and as hackers become more familiar with its intricacies, the threats may someday equal the benefits — unless companies prepare now.Today, the biggest VOIP-related security threats are inside a company’s firewall. That’s because, for the most part, most systems still rely on a combination of an IP network and the PSTN (Public Switched Telephone Network) land-line network. Each time a device engages in a VOIP call, the VOIP phone number’s IP address is translated into a standard phone number, which is passed through the PSTN network.
http://www.midmarket.eweek.com/c/a/News/How-to-Secure-VOIP/

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