SIP Trunking For Dummies®, Sonus Special Edition - Sonus Networks

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SIP Trunking For Dummies®, Sonus Special Edition - Sonus Networks

These materials are the copyright of John Wiley & Sons, Inc. and anydissemination, distribution, or unauthorized use is strictly prohibited.


These materials are the copyright of John Wiley & Sons, Inc. and anydissemination, distribution, or unauthorized use is strictly prohibited.SIP TrunkingFOR‰DUMmIESSONUS SPECIAL EDITIONby Pat Hurley


These materials are the copyright of John Wiley & Sons, Inc. and anydissemination, distribution, or unauthorized use is strictly prohibited.SIP Trunking For Dummies ® , Sonus Special EditionPublished byJohn Wiley & Sons, Inc.111 River StreetHoboken, NJ 07030-5774www.wiley.comCopyright © 2012 by John Wiley & Sons, Inc., Hoboken, New JerseyPublished by John Wiley & Sons, Inc., Hoboken, New JerseyNo part of this publication may be reproduced, stored in a retrieval system or transmitted in anyform 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 theprior written permission of the Publisher. Requests to the Publisher for permission should beaddressed to the Permissions Department, John Wiley & Sons, Inc., 111 River Street, Hoboken, NJ07030, (201) 748-6011, fax (201) 748-6008, or online at http://www.wiley.com/go/permissions.Trademarks: Wiley, the Wiley logo, For Dummies, the Dummies Man logo, A Reference for the Restof Us!, The Dummies Way, Dummies.com, Making Everything Easier, and related trade dress aretrademarks or registered trademarks of John Wiley & Sons, Inc. and/or its affiliates in the UnitedStates and other countries, and may not be used without written permission. Sonus and the Sonuslogo are registered trademarks of Sonus. All other trademarks are the property of their respectiveowners. John Wiley & Sons, Inc., is not associated with any product or vendor mentioned in thisbook.LIMIT OF LIABILITY/DISCLAIMER OF WARRANTY: THE PUBLISHER AND THE AUTHOR MAKENO REPRESENTATIONS OR WARRANTIES WITH RESPECT TO THE ACCURACY ORCOMPLETENESS OF THE CONTENTS OF THIS WORK AND SPECIFICALLY DISCLAIM ALLWARRANTIES, INCLUDING WITHOUT LIMITATION WARRANTIES OF FITNESS FOR APARTICULAR PURPOSE. NO WARRANTY MAY BE CREATED OR EXTENDED BY SALES ORPROMOTIONAL MATERIALS. THE ADVICE AND STRATEGIES CONTAINED HEREIN MAY NOT BESUITABLE FOR EVERY SITUATION. THIS WORK IS SOLD WITH THE UNDERSTANDING THATTHE PUBLISHER IS NOT ENGAGED IN RENDERING LEGAL, ACCOUNTING, OR OTHERPROFESSIONAL SERVICES. IF PROFESSIONAL ASSISTANCE IS REQUIRED, THE SERVICES OF ACOMPETENT PROFESSIONAL PERSON SHOULD BE SOUGHT. NEITHER THE PUBLISHER NORTHE AUTHOR SHALL BE LIABLE FOR DAMAGES ARISING HEREFROM. THE FACT THAT ANORGANIZATION OR WEBSITE IS REFERRED TO IN THIS WORK AS A CITATION AND/OR APOTENTIAL SOURCE OF FURTHER INFORMATION DOES NOT MEAN THAT THE AUTHOR ORTHE PUBLISHER ENDORSES THE INFORMATION THE ORGANIZATION OR WEBSITE MAYPROVIDE OR RECOMMENDATIONS IT MAY MAKE. FURTHER, READERS SHOULD BE AWARETHAT INTERNET WEBSITES LISTED IN THIS WORK MAY HAVE CHANGED OR DISAPPEAREDBETWEEN WHEN THIS WORK WAS WRITTEN AND WHEN IT IS READ.For general information on our other products and services, please contact ourBusiness Development Department in the U.S. at 317-572-3205. For details on how tocreate a custom For Dummies book for your business or organization, contact info@dummies.biz. For information about licensing the For Dummies brand for products orservices, contact BrandedRights&Licenses@Wiley.com.ISBN: 978-1-118-48767-9 (pbk)ISBN: 978-1-118-48824-9 (ebk)Manufactured in the United States of America10 9 8 7 6 5 4 3 2 1


These materials are the copyright of John Wiley & Sons, Inc. and anydissemination, distribution, or unauthorized use is strictly prohibited.Contents at a GlanceIntroduction................................................................................................ 1Chapter 1: Getting Acquainted with SIP Trunking................................. 5Chapter 2: Seeing the Benefits of SIP Trunking.................................... 13Chapter 3: Reaping the ROI Benefits of SIP Trunking.......................... 21Chapter 4: Taking a Peek at SIP Trunking Considerations.................. 31Chapter 5: Ten Reasons to Choose Sonus SBCs for SIP Trunking..... 39


These materials are the copyright of John Wiley & Sons, Inc. and anydissemination, distribution, or unauthorized use is strictly prohibited.Table of ContentsIntroduction ...................................... 1About This Book......................................................................... 1How This Book Is Organized..................................................... 2Icons Used in This Book............................................................. 3Chapter 1: Getting Acquainted with SIP Trunking. .... 5Introducing Enterprise PBX Trunking...................................... 6Understanding the Types of Enterprise PBX Trunking.......... 6Going Digital with PRI....................................................... 7Entering the SIP world..................................................... 7Understanding How SIP Trunking Works................................. 7Introducing the Components of SIP Trunking......................... 9IP PBX................................................................................. 9Session border controllers.............................................. 9Session Management System........................................ 11ITSP /SIP service provider............................................. 11Chapter 2: Seeing the Benefits of SIP Trunking ...... 13Unifying Your Access Network................................................ 13Making management easier........................................... 15Simplifying growth.......................................................... 15Deploying SIP Services More Easily........................................ 16Enabling Cloud-Based Services............................................... 17Making Your Network More Reliable and Resilient.............. 18Going Local and Eliminating 800............................................. 19Chapter 3: Reaping the ROI Benefits of SIP Trunking..... 21Making the Case for Migrating to SIP Trunking..................... 21Aggregation of trunks..................................................... 22Aggregation of access.................................................... 24On-Net calling.................................................................. 24Other cost savings.......................................................... 25Looking at Case Studies........................................................... 26Case Study #1: The global company............................ 26Case Study #2: The bank................................................ 27Case Study #3: The airline............................................. 28


These materials are the copyright of John Wiley & Sons, Inc. and anydissemination, distribution, or unauthorized use is strictly prohibited.Table of ContentsvChapter 4: Taking a Peek at SIP TrunkingConsiderations ................................ 31Considering Your ITSP............................................................. 31Pricing and pricing structure........................................ 32Dealing with DID and local calls.................................... 33Dispersing aggregation points...................................... 33Quality of service............................................................ 34Blocking................................................................. 34Codecs................................................................... 34Agreements........................................................... 35Considering Your SBC.............................................................. 35Chapter 5: Ten Reasons to Choose Sonus SBCsfor SIP Trunking ............................... 39A Leader in SIP Communications............................................ 39Networked Policy Management for SBCs............................... 39Highest Performance................................................................ 40Better Transcoding Support.................................................... 40Scalability................................................................................... 41Support for Future Apps through Media Support................ 41Ironclad Security....................................................................... 41Guaranteed Interoperability.................................................... 42Robust Session Management................................................... 42A Complete Package................................................................. 42


These materials are the copyright of John Wiley & Sons, Inc. and anydissemination, distribution, or unauthorized use is strictly prohibited.Publisher’s AcknowledgmentsWe’re proud of this book and of the people who worked on it. For details on how tocreate a custom For Dummies book for your business or organization, contact info@dummies.biz. For details on licensing the For Dummies brand for products orservices, contact BrandedRights&Licenses@Wiley.com.Some of the people who helped bring this book to market include the following:Acquisitions, Editorial, and VerticalWebsitesProject Editor: Carrie A. BurchfieldEditorial Manager: Rev MengleAcquisitions Editor: Katie MohrBusiness Development Representative:Sue BlessingCustom Publishing Project Specialist:Michael SullivanComposition ServicesSr. Project Coordinator: Kristie ReesLayout and Graphics: Christin SwinfordProofreaders: Melissa Cossell,John GreenoughPublishing and Editorial for Technology DummiesRichard Swadley, Vice President and Executive Group PublisherAndy Cummings, Vice President and PublisherMary Bednarek, Executive Director, AcquisitionsMary C. Corder, Editorial DirectorPublishing and Editorial for Consumer DummiesKathleen Nebenhaus, Vice President and Executive PublisherComposition ServicesDebbie Stailey, Director of Composition ServicesBusiness DevelopmentLisa Coleman, Director, New Market and Brand Development


These materials are the copyright of John Wiley & Sons, Inc. and anydissemination, distribution, or unauthorized use is strictly prohibited.IntroductionMost enterprises are familiar with VoIP (Voice overIP) and probably have begun at least thinking aboutimplementing Unified Communications (UC) — a suite ofintegrated voice, video, data, and text communicationsdelivered via the VoIP protocol known as Session InitiationProtocol (SIP). In fact, many enterprises have begun to deploythese services but are still connecting their primary voicecommunications systems called Private Branch Exchanges(PBX) by using legacy Time Division Multiplexing (TDM) T1lines. This approach adds cost and complexity and makesyour network less ready for taking the next step in UC.A better way to connect PBXs is to move past those expensiveT1s and on to an integrated Internet Protocol (IP) networkusing SIP trunking. SIP Trunking For Dummies, Sonus SpecialEdition, is here to help you understand this transition withsome timely information about SIP trunking, the serviceproviders and equipment that enable it, and the benefitsyou gain when you make your move to SIP trunking.About This BookSIP Trunking For Dummies, Sonus Special Edition, is notwritten as a technical manual for telecom engineers lookingfor deep techie knowledge or tips for planning SIP trunkingdeployment — there are plenty of 600-page technical booksfor those purposes. Instead, you’ll find that this book is designedfor the non-technical folks — marketers, sales professionals,finance wizards, and so on — in mid- and large-sized enterpriseswho want to save money and enable new UC services byadopting a SIP trunking solution. If you know a little bit aboutSIP trunking today, I think you’ll know more when you’vefinished reading, and if you know nothing, don’t worry; I walkyou through all you need to know before you take that salescall or put out your Request for Proposal (RFP).


These materials are the copyright of John Wiley & Sons, Inc. and anydissemination, distribution, or unauthorized use is strictly prohibited.2SIP Trunking For Dummies, Sonus Special EditionHow This Book Is OrganizedThis book is organized into five chapters. As is the case in anyFor Dummies book, each of these chapters is self-contained,so you don’t need to read the entire book from start to finish.If you see a chapter that you already know everything about,feel free to skip it. Whenever a complex topic from anotherchapter is raised, you see a reference to that chapter — noneed to spend your time digging around in the table of contents.Chapter 1: Getting Acquaintedwith SIP TrunkingChapter 1 introduces you to SIP trunking and trunking ingeneral. In this chapter, you discover enterprise PBX trunkingand how SIP trunking fits in with traditional methods like TDMtrunking over T1s. Then you learn how SIP trunking actuallyworks and what components you need to implement it.Chapter 2: Seeing the Benefitsof SIP TrunkingChapter 2 is where you find the (many) benefits of adoptingSIP trunking, with a focus on operational rather than monetarybenefits. SIP trunking can simplify the management of yournetwork and enable the deployment of new UC services. SIPtrunking can also help you adopt cloud-based services.Chapter 3: Reaping the ROIBenefits of SIP TrunkingSIP trunking is a huge money saver for many enterprises —saving many as much as 50 percent on their recurring telecomcosts. In this chapter, you discover what these Return onInvestment (ROI) benefits are all about. You’ll also see somereal-world case study examples from three enterprises thatsuccessfully implemented SIP trunking. If you’re in finance orhave a budget to worry about, you’ll enjoy this chapter.


These materials are the copyright of John Wiley & Sons, Inc. and anydissemination, distribution, or unauthorized use is strictly prohibited.Introduction 3Chapter 4: Taking a Peek at SIPTrunking ConsiderationsIn Chapter 4, you find out the questions to ask and the thingsto consider before you commit to a SIP trunking deploymentand when you choose an Internet Telephony Service Provider(ITSP) to provide your SIP trunking service. You also see theimportant considerations to keep in mind when selecting aSession Border Controller (SBC).Chapter 5: Ten Reasons to ChooseSonus SBCs for SIP TrunkingIf you read Chapters 1 through 4, I hope you’re sold on SIPtrunking and also have a good idea about what makes a goodSIP trunking solution. But even if you haven’t, Chapter 5 iswhere you look at some of the attributes of the SBCs offeredby Sonus and understand how Sonus SBCs may match up wellwith your SIP trunking needs.Icons Used in This BookThis book calls out important bits of information with iconson the left margins of the page. You’ll find three such icons inthe book.The Tip icon points out bits of information that aid in yourunderstanding of SIP trunking or provides a trick of the tradeto help save you time, money, and much more.The Remember icon points out textual tidbits that you shouldlock away in your memory for future use.I try to keep the technical jargon and discussion to a minimum.You won’t need to know these factoids to get the most out ofthe book, but you may find them interesting.


These materials are the copyright of John Wiley & Sons, Inc. and anydissemination, distribution, or unauthorized use is strictly prohibited.4SIP Trunking For Dummies, Sonus Special Edition

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