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Scalable VoIP Mobility by Joseph Epstein

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Chapter 8. Securing Voice
8.0. Introduction
Security is the most important aspect for voice mobility networks. Of course, quality of service must be there, or the network will not be used for long or with any sense of appreciation. And the devices must be simple, and the network must be run well enough that users do not notice when things are changed or the network is grown. However, no one would use a phone if they thought that others were listening in on their calls. Enterprises would abandon their networks left and right if strangers, criminals, or their competition could listen in on the goings on in the network.
Voice mobility means no wires, and no wires means that there are signals. These signals do not know the difference between a friendly ...

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