February 2013
Intermediate to advanced
242 pages
6h 19m
English
Content preview from Packet Guide to Voice over IPBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 1. Introduction to Voice over the Internet Protocol
Enter the expansion of Voice over IP with its disruptive transition of voice from the old circuit switched networks to new IP-based networks
—Mark Spencer in the foreword for Asterisk: The
Future of Telephony
Several years ago, most of the writing about Voice over IP (VoIP) was about how important it was going to be, what protocols were going to dominate, the need for higher education to adopt VoIP course work, and the impact on the industry. VoIP and its companion, Unified Communications, are now here to stay. The decision facing most companies is not if they will deploy VoIP but when. There is a need for graduates of communication programs and network professionals to have an in-depth understanding of IP-based voice topologies and protocols. If you read the introductory portion of this book, then you know it offers a comprehensive look into the architecture and standards used in VoIP deployments. For those not intimately familiar with the concepts and issues associated with this increasingly ubiquitous technology, I present this chapter.
This first look into VoIP will cover most of the issues associated with typical deployment and is designed to give you enough information to have an intelligent conversation. As you read, you will discover that VoIP represents a complete change to the methods used to communicate. This chapter starts with a quote regarding the open source product Asterisk and its start into VoIP. I would ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.