These materials are © 2015 John Wiley & Sons, Inc. Any dissemination, distribution, or unauthorized use is strictly prohibited. WebRTC 2nd Sonus Special Edition By Justin Hart These materials are © 2015 John Wiley & Sons, Inc. Any dissemination, distribution, or unauthorized use is strictly prohibited. WebRTC For Dummies®, 2nd Sonus Special Edition Published by John Wiley & Sons, Inc. 111 River St. Hoboken, NJ 07030‐5774 www.wiley.com Copyright © 2015 by John Wiley & Sons, Inc. No part of this publication may be reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, scanning or otherwise, except as permitted under Sections 107 or 108 of the 1976 United States Copyright Act, without the prior written permission of the Publisher. 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ISBN: 978‐1‐119‐09878‐2 (pbk); ISBN: 978‐1‐119‐09885‐0 (ebk) Manufactured in the United States of America 10 9 8 7 6 5 4 3 2 1 Publisher’s Acknowledgments Some of the people who helped bring this book to market include the following: Project Editor: Carrie A. Johnson Business Development Representative: Editorial Manager: Rev Mengle Sue Blessing Acquisitions Editor: Katie Mohr Production Editor: Vinitha Vikraman These materials are © 2015 John Wiley & Sons, Inc. Any dissemination, distribution, or unauthorized use is strictly prohibited. Table of Contents Foreword ......................................... v Introduction ...................................... 1 About This Book ........................................................................ 1 Icons Used In This Book ............................................................ 2 Chapter 1: Getting Acquainted with WebRTC ......... 3 Who Supports WebRTC Today? ............................................... 4 How Does WebRTC Work? ........................................................ 5 Why is WebRTC Important? ..................................................... 6 Understanding the Elements that Make Up WebRTC ............ 7 Browsers ........................................................................... 7 Web browser APIs ........................................................... 8 Web servers ...................................................................... 9 Codecs ............................................................................... 9 Web applications ............................................................. 9 Gateways ......................................................................... 10 Session Border Controller ............................................ 10 Understanding the Data Channel ........................................... 12 Chapter 2: Integrating WebRTC into Other Networks .................................. 13 Learning Where WebRTC Can Fit into Your Network ......... 14 Understanding the Need for an SBC ...................................... 15 Interworking for interoperability ................................. 16 Securing the SIP network .............................................. 17 Navigating the firewall .................................................. 17 Managing policies .......................................................... 18 Figuring Out the Role of WebRTC Gateways ........................ 19 Chapter 3: What Can WebRTC Do for Me? ........... 21 Calling All Enterprise Connect Centers! ................................ 21 Facing the Future with Videoconferencing ........................... 22 Bringing a Carrier’s IMS Network to the Web ...................... 23 Extending Over‐the‐Top Services .......................................... 24 Games, Games, Games! ............................................................ 25 These materials are © 2015 John Wiley & Sons, Inc. Any dissemination, distribution, or unauthorized use is strictly prohibited. iv WebRTC For Dummies, 2nd Sonus Special Edition _____________ Chapter 4: Where’s the Money in WebRTC? ......... 27 Tapping into Licensing Revenues .......................................... 27 Selling Tools for Apps ............................................................. 28 Making Money for Telcos and Other Service Providers ..... 28 Building the Infrastructure ..................................................... 29 Benefiting Enterprise Users .................................................... 29 Chapter 5: Ten Things to Think About before You Deploy WebRTC .............................. 31 The Business Case ................................................................... 31 The Sound and Vision ............................................................. 32 The Web Browser .................................................................... 32 JavaScript .................................................................................. 33 The Web Server ........................................................................ 33 Authentication .......................................................................... 34 Turn, Turn, Turn ...................................................................... 35 The WebRTC Gateway ............................................................. 35 Media Transcoding .................................................................. 36 SIP Trunks ................................................................................. 36 These materials are © 2015 John Wiley & Sons, Inc. Any dissemination, distribution, or unauthorized use is strictly prohibited. Foreword elcome to the 2nd Edition of WebRTC For Dummies. WAs a long‐time observer and analyst of the technol- ogy, I believe it has the potential to become truly transforma- tive. There could be as many as 6 billion devices supporting WebRTC by 2019, and as many as 2 billion people using it — over half the world’s Internet population. Books such as this, which introduce key ideas to new audiences, are important in helping it follow that trajectory. WebRTC is a major step toward what is called “contextual communications,” moving voice and video from generic, standalone “calls” to events that are embedded into websites and mobile apps. While it is good to have the ubiquitous phone or a videoconference system as a “jack‐of‐all‐trades,” there are many instances where we could benefit from combining a conversation with the web. For example, imagine directly conducting a recruitment video‐ interview “inside” an HR application, with recordings made securely‐available for everyone in the hiring process to view later. Perhaps a remote telemedicine call could allow a doctor to both speak to the patient and simultaneously browse a website showing health and nutrition advice. An existing contact center might wish to add a special “video concierge” service for its premier customers, starting with just a few agents but perhaps expanding over time. It is the diversity of use‐cases that makes WebRTC so power- ful — it can enhance or extend current systems owned by businesses or telcos, or allow entirely new services and plat- forms to be created. It has uses in B2B, B2C, C2C, and maybe even M2M worlds. It might appear in an oilfield video‐main- tenance application or enhance a new form of mobile social‐