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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:
• “What is VoIP?” on page 805
• “VoIP Security” on page 805
• “VoIP Protocols” on page 806
• “SonicWALL’s VoIP Capabilities” on page 808
The remainder of the chapter describes how
to configure and use SonicWALL VoIP:
• “VoIP Settings” on page 815
• “VoIP Deployment Scenarios” on page 825
• “VoIP Call Status” on page 828
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.