Chapter 13
VoIP Architecture
Abstract
This chapter presents concepts you will need to keep in mind as you deploy voice service on your network. The emphasis is on the SIP (session initiation protocol), as it is the dominant protocol at the time of writing. We describe how it works, and present some cases in which you may encounter difficulties, suggesting how to avoid them.
Keywords
CALEA; Compression; Fax transmission; Ground loops; Lawful intercept; Packet size; Powering; Quality of service; Ringing issues; SIP; VoIP
Introduction
There are many ways to send voice over the Internet. Collectively they are called, very creatively, voice over internet protocol (VoIP). While each of the standards is different (and incompatible), they have this in common: ...
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