Next Generation Network Services Next Generation Network Services Neill Wilkinson Copyright q 2002 John Wiley & Sons, Ltd ISBNs: 0-471-48667-1 (Hardback); 0-470-84603-8 (Electronic) Neill Wilkinson Quortex Consultants Ltd., UK JOHN WILEY & SONS, LTD Next Generation Network Services Technologies and Strategies Next Generation Network Services Neill Wilkinson Copyright q 2002 John Wiley & Sons, Ltd ISBNs: 0-471-48667-1 (Hardback); 0-470-84603-8 (Electronic) Copyright q2002 by John Wiley & Sons, Ltd. Baffins Lane, Chichester, West Sussex, PO19 1UD, England National 01243 779777 International (+44) 1243 779777 e-mail (for orders and customer service enquiries): cs-books@wiley.co.uk Visit our Home Page on http://www.wiley.co.uk or http://www.wiley.com All Rights Reserved. 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Next Generation Network Services Neill Wilkinson Copyright q 2002 John Wiley & Sons, Ltd ISBNs: 0-471-48667-1 (Hardback); 0-470-84603-8 (Electronic) Dedications I dedicate this book to my deceased parents, Irene and Bill, who unfortu- nately will not see it published, but supported me throughout my child- hood and through to the early part of my degree. They always told me I would do something valuable and I’d like to think this is it! I’d also like to dedicate the book to my wife, Catherine, and son, Thomas, for supporting me in this project. They have both given me motivation to complete this task. And finally to my cat Callie who spent many a fond hour on my lap asleep when I couldn’t sleep because of the work involved in compiling the book. Next Generation Network Services Neill Wilkinson Copyright q 2002 John Wiley & Sons, Ltd ISBNs: 0-471-48667-1 (Hardback); 0-470-84603-8 (Electronic) Contents Preface xi Part I Technology 1 Introduction 1 1 Circuit Switched Technologies 3 1.1 The evolution of circuit switching 3 1.2 Signalling communicating between switching points 10 2 The Transmission Infrastructure 19 2.1 Introduction 19 2.2 Voice Digitisation 20 2.3 Plesiochronous Digital Hierarchy 25 2.4 Synchronous Digital Hierarchy & Synchronous Optical Networks 27 2.5 Dynamic Synchronous Transfer Mode (DTM) 29 2.6 Wave Division Multiplex 30 3 Intelligent Networks 33 3.1 Introduction 33 3.2 Functional components 35 4 Mobile Networks 41 4.1 Introduction 41 4.2 Mobile network architecture and components 44 4.3 Beyond GSM, the path to UMTS 48 5 Packet Switched Technologies 53 5.1 Introduction 53 5.2 Basic Internet Protocol 56 Next Generation Network Services Neill Wilkinson Copyright q 2002 John Wiley & Sons, Ltd ISBNs: 0-471-48667-1 (Hardback); 0-470-84603-8 (Electronic) 5.3 Mobile IP 62 5.4 Transmission Control Protocol 63 5.5 User Datagram Protocol 64 5.6 Multimedia Transport 65 5.7 IP Application signalling protocols 68 6 Access Technologies 85 6.1 Introduction 85 6.2 Integrated Services Digital access 86 6.3 Digital Subscriber Line 88 6.4 Leased Lines and other fixed line services 91 7 Voice and Data Convergence 93 7.1 Introduction 93 7.2 Asynchronous Transfer Mode 94 8 Representing Information 99 8.1 Introduction 99 8.2 (X)HTML 100 8.3 XML 101 8.4 VoiceXML 105 8.5 SOAP, UDDI and WSDL 106 8.6 IPDR 110 8.7 Call Processing Language (CPL) 111 9 Directories - More Than Just Information Storage 115 9.1 Introduction 115 9.2 Domain Name System (DNS) 116 9.3 X.500 and LDAP 118 9.4 The Meta-Directory 119 9.5 Other directory technologies and ideas 119 Part II Services, Architectures and Applications 121 Introduction 121 10 Intelligent Network Services 123 10.1 Introduction 123 10.2 Example existing services and how they work 124 10.3 Softswitches and application servers 126 10.4 The future of IN 128 10.5 Voice based services 135 CONTENTSviii 11 Call Centres 145 11.1 Introduction 145 11.2 Computer Telephony Integration (CTI) 146 11.3 The future for CTI 151 12 Internet Based Services 155 12.1 Introduction - the move to hosted services 155 12.2 Presence 157 12.3 Application Frameworks 159 13 Bringing it all Together - the New Network Architecture 167 13.1 Introduction 167 13.2 The next-generation network architecture 168 13.3 A service example 170 Part III Implications 173 Introduction 173 14 Expectation and Realisation 175 14.1 Too much too soon? 175 14.2 Where to now? 176 14.3 Strategies for making it happen 179 14.4 How long and How much? 182 References and Further Reading 187 Glossary 189 Index 193 CONTENTS ix [...]... see the importance of this in Chapter 3, on intelligent networks We are going to take a brief interlude from switching and signalling to cover transmission systems, and then we will pick up advance telephony services in the form of intelligent networks in Chapter 3 and explore the use of SS#7 for more advanced services Next Generation Network Services Neill Wilkinson Copyright q 2002 John Wiley & Sons,... capacity with more and more powerful processors Most recently, the use of standard computing hardware and the influence of the Internet have lead to the so-called next- generation networks It is these nextgeneration networks and the new capabilities and services that this book is about Motivation for the book My aim for the book was to bring together all the technologies that at first glance seem unconnected... overview of packet networks, and describes the salient information relating to how they have evolved, together with their use for transporting information in the nextgeneration networks The first part of the book concludes with how information will be represented and stored in the form of XML and network directories The combination of all of this technology will lead to the application of voice services as... can work with web style tools rather than the IN services creation environments of the 1990s This section explores the technologies and techniques that have lead to the next- generation network services that will emerge over the coming years It also gives an overview of the technologies that will allow the telecommunications service providers to create new services In telecommunications, voice has always... switched telephone network and other private networks The key point about the move from analogue signalling at the edge of the network to digital signalling is the increase in services and facilities that can be supported, and for example the ability for end devices to communicate with each other, using the public switched telephone network as a packet data network for carrying those messages One facility... discussed in Chapters 3 and 4, respectively INAP stands for intelligent network application protocol and provides the functionality to support enhanced services in fixed networks CAP stands for Customised Applications for Mobile Networks Enhanced Logic (CAMEL) Application Part and MAP for Mobile Application Part, both protocols for mobile networks that provide enhanced application functionality specifically... and have been influential in delivering the new world of telecommunications Next Generation Network Services Neill Wilkinson Copyright q 2002 John Wiley & Sons, Ltd ISBNs: 0-471-48667-1 (Hardback); 0-470-84603-8 (Electronic) 1 Circuit Switched Technologies 1.1 THE EVOLUTION OF CIRCUIT SWITCHING The current circuit switched network concept has remained essentially unchanged from the original electromechanical... spend! So I wanted to avoid the problem that I face, by putting a reference together that would cover at a reasonable level all the areas that influence and will influence telecommunications services and networks of the next generation What I cannot achieve is a complete reference, nor would that be appropriate I would have loved to be able to include all the technical specifications, standards and other references... circuit-switched networks and are looking to see how the technologies they are working with will change over the next five to ten years Equally, engineers who are now facing the new data to carry (voice) should find this book a useful reference to show where the voice networks have come from and are going, and how this influences their role How to read this book The book is split into three main parts: technology, services. .. desire to increase the number of services that, the network could offer, whilst reducing the need for increasingly complex software on the SPC was achieved This was realised by the introduction of the intelligent network architecture (see Chapter 3) So routing is the process of interpreting the digits from this call plan into a meaningful path through the circuit switched network Routing is a distributed . Next Generation Network Services Next Generation Network Services Neill Wilkinson Copyright q 2002 John. Ltd., UK JOHN WILEY & SONS, LTD Next Generation Network Services Technologies and Strategies Next Generation Network Services Neill Wilkinson Copyright