509
SonicOS Enhanced 4.0 Administrator Guide
CHAPTER 47
Chapter 47: Configuring VoIP Support
VoIP
This chapter contains the following sections:
• “VoIP Overview” on page 509
• “SonicWALL’s VoIP Capabilities” on page 512
• “Configuring SonicWALL VoIP Features” on page 520
• “VoIP Deployment Scenarios” on page 531
VoIP Overview
This section provides an overview of VoIP. It contains the following sections:
• “What is VoIP?” on page 509
• “VoIP Security” on page 510
• “VoIP Protocols” on page 511
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.
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