Introduction to VoIP Protocols
Chapter 1
- VoIP: Do You See What I’m Saying? eBook
By NetQoS
Published 2007, Posted February 2008
Abstract:
VoIP has a unique set of performance requirements that make it a challenge for any data network. Understanding the operation of core VoIP protocols is a first step in understanding the performance requirements that VoIP places on your network.
A VoIP phone call occurs in two stages:
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Call setup. This stage is required to set up everything needed to make the telephone connection between the person making the call (the caller) and the person receiving the call (the called party). |
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The call itself. The audio conversation needs to be encoded and transmitted across the network. |
The hardware required to make a VoIP phone call varies by vendor, but there are several common components that you will see on your network. Let’s discuss some of these devices and terminology before diving into the protocols that they use to communicate.
Do you know this already? Many of you may have already deployed VoIP and are working with it every day. If you already have a good grasp on the basic components and protocols, you may want to skip to ahead to VoIP and Network Performance on page 13.
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