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Securing Cisco IP Telephony Networks by Akhil Behl

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Chapter 1. What Is IP Telephony Security and Why Do You Need It?

In last few decades, communication systems have evolved, and one such major evolution is in the field of telecommunications in which increasingly, there has been adoption of Internet Protocol-based communications or in other words, Internet Protocol Telephony. Internet Protocol Telephony (IP Telephony) leverages the power of a converged network that is, a network where data and voice can co-exist, thereby helping organizations to reduce the Total Cost of Ownership (TCO) and increase the Return On Investment (ROI).

IP Telephony is a real-time technology that virtually encompasses an organization’s communication channels and dependent lines of business and processes. This fact makes ...

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