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Informationen zum Autor JOHN G. NELLIST led the development and implementation of fiber optic technology into the British Columbia telephone network as General Transmission Engineering Manager at Telus (formerly BC Telecom). He was appointed overall coordinator for the first field trial of a fiber optic transmission system in 1978 and presented one of the first papers on an operating fiber optic system in 1979 at the International Fiber Optic Conference. With more than forty years of telecommunications experience, John Nellist has published and presented numerous technical papers and articles on the subject. Currently a consultant at Sarita Enterprises, Ltd., Nellist has also coauthored two books with Elliott M. Gilbert, Telecommunications Wiring for Commercial Buildings and Understanding Modern Telecommunications and the Information Superhighway. Klappentext Wer hat noch nicht von den Fortschritten der Telekommunikation profitiert? Die Entwicklungen im Detail richtig zu verstehen, ist aber keineswegs einfach. Auf einem auch für Fachfremde geeigneten Niveau zeigt die aktualisierte 3. Auflage dieses Bestsellers, wie Sprach-, Video- und Multimediainformationen gleichzeitig über die Datenautobahn geleitet und verteilt werden. Aufschlussreich sind auch die historischen Ausführungen und Ausblicke in die Zukunft. Schwerpunkte bilden drahtlose Technologien, Satellitenkommunikation, digitale Netze, Video- und Bildübertragungen sowie ATM, SONET, Breitband-ISDN, UMTS, Glasfasernetze und mehr. Zusammenfassung A guide to the basics of telecommunications and digital technology. It presents a nontechnical treatment of how voice, video, and multimedia can simultaneously travel over the various telecommunications systems. Inhaltsverzeichnis Introduction 1 1 The Evolution of Telecommunications 3 The Telegraph 3 The Telephone 3 Wireless Communications 4 AT&T Monopoly 4 Trans-Canada System 4 Semiconductors 5 Digital Communications 5 Satellite Communications 6 Fiber Optics 6 AT&T Break-Up 6 Telecommunications Act of 1996 8 The Meltdown 10 Conclusion 10 2 Analog Transmission 12 Conclusion 15 Review Questions for Chapter 2 15 3 Digital Transmission 17 Conclusion 19 Review Questions for Chapter 3 20 4 Basic Multiplexing Techniques 21 Brief History 21 FDM 21 TDM 22 Pulse-Code Modulation 22 Conclusion 27 Review Questions for Chapter 4 27 5 Switching Hierarchy 28 Brief History '. 28 Divestiture 30 Conclusion 32 Review Questions for Chapter 5 32 6 North American Digital Hierarchies 34 Conclusion 37 Review Questions for Chapter 6 37 7 Transmission 38 Transmission Level 39 Via Net Loss (VNL) 40 All-Digital Network 40 Echo Suppressors and Echo Cancellers 43 Split Echo Suppressor 44 Full Echo Suppressor 45 Digital Echo Canceller 45 Conclusion 46 Review Questions for Chapter 7 47 8 The Local Subscriber Loop 48 Brief History 48 The Local Loop 48 Digital Subscriber Carrier Systems 50 Asymmetric Digital Subscriber Lines 52 Conclusion 54 Review Questions for Chapter 8 55 9 Microwave Radio 56 Brief History 56 Digital Radio 56 Design Considerations 58 SONET Radio 60 Conclusion 61 Review Questions for Chapter 9 61 10 Satellite Communications 63 Brief History 63 Geostationary (GEO) Satellites 65 Parking Slots 66 Transponders 67 The Footprint 68 Time Delay 68 Global Positioning System 70 MEO and LEO Satellites 71 Direct-to-Home Satellite System 75 Satellite Oper...
Inhaltsverzeichnis
Introduction.
The Evolution of Telecommunications.
Analog Transmission.
Digital Transmission.
Basic Multiplexing Techniques.
Switching Hierarchy.
North American Digital Hierarchies.
Transmission.
The Local Subscriber Loop.
Microwave Radio.
Satellite Communications.
Switching Systems.
Private Branch Exchange.
Traffic Considerations.
Video Transmission.
Wireless.
The Computer.
The Internet.
Lightwave Systems.
Telecommunications Glossary.
Bibliography.
Index.
Answers to Review Questions.
About the Author.
Bericht
"...provides a non-technical overview of contemporary telecommunications systems." ( SciTech Book News , Vol. 26, No. 2, June 2002)
