SonicWALL 5.8.1 Manuale Utente

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SonicOS 5.8.1 Administrator Guide
CHAPTER 58 
Chapter 58: 
Configuring VoIP Support
VoIP Overview
This section provides an overview of VoIP. It contains the following sections:
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The remainder of the chapter describes how to configure and use SonicWALL VoIP:
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What is VoIP?
Voice over IP (VoIP) is an umbrella term for a set of technologies that allow voice traffic to be 
carried over Internet Protocol (IP) networks. VoIP transfers the voice streams of audio calls into 
data packets as opposed to traditional, analog circuit-switched voice communications used by 
the public switched telephone network (PSTN).
VoIP is the major driving force behind the convergence of networking and telecommunications 
by combining voice telephony and data into a single integrated IP network system. VoIP is all 
about saving cost for companies through eliminating costly redundant infrastructures and 
telecommunication usage charges while also delivering enhanced management features and 
calling services features.
VoIP Security
Companies implementing VoIP technologies in an effort to cut communication costs and extend 
corporate voice services to a distributed workforce face security risks associated with the 
convergence of voice and data networks. VoIP security and network integrity are an essential 
part of any VoIP deployment.