December 2005
Beginner
336 pages
5h 28m
English
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Introduction
Ever since Alexander Graham Bell invented the telephone in 1876, telephony systems have been a part of our life. More recently, with the advent of the Internet, much of our day-to-day communication (for example, e-mail) crosses an IP network (for example, the Internet). Today, these two worlds are merging, and companies can place phone calls over their existing data network infrastructures using a technology called Voice over IP (VoIP).
The topic of VoIP attracts people of diverse backgrounds, from the private branch exchange (PBX) technician, to the network engineer, to the home user wanting to reduce his or her monthly phone bill. This book gets all readers on the same page by reviewing legacy telephony systems, and then it proceeds ...
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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.