Let's say you've decided to switch to a phone system that uses Voice-over-Internet Protocol technology. Whether you opt for a hosted service or operate the technology inside your company, don't neglect security. You still need to monitor the traffic that's sailing through your networks, keeping an eye out for viruses, denial-of-service attacks and unauthorized use.

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To see the details behind this VoIP security calculator and fill in your own estimates, click on the "Get the Tool" icon above and download the interactive worksheet.