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Understanding Telecommunications and Lightwave Systems
An Entry-Level Guide
John G. Nellist (Author)
9780471150329, Wiley
Paperback / softback, published 24 October 2001
284 pages
23.7 x 15.9 x 1.6 cm, 0.408 kg
"...provides a non-technical overview of contemporary telecommunications systems." (SciTech Book News, Vol. 26, No. 2, June 2002)
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.
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 Operators 75 Conclusion 76 Review Questions for Chapter 10 76 11 Switching Systems 78 The Strowger Switch 78 Panel Switching Syste 79 Crossbar Switch 79 The First Electronic Switch 80 The Digital Switch 81 The Optical Switch 84 Optical Switches with Electrical Cores 85 All-Optical Switches 85 Conclusion 90 Review Questions for Chapter 11 90 12 Private Branch Exchange 92 Brief History 92 Analog PBX 92 Digital PBX 93 Conclusion 95 Review Questions for Chapter 12 96 13 Traffic Considerations 97 Brief History 97 CCS 97 Grade of Service 98 Internet Congestion 99 Conclusion 101 Review Questions for Chapter 13 101 14 Video Transmission 102 Brief History 102 Video Compression 102 Switched Data Services 103 Video Codecs 103 Videophone 104 Multimedia 105 Conclusion 107 Review Questions for Chapter 14 108 15 Wireless 109 Brief History 109 Cellular Telephone Service 109 The Mobile Unit 111 Personal Communications Services (PCS) 113 The Standards 114 The Future 115 Conclusion 117 Review Questions for Chapter 15 119 16 The Computer 120 Brief History 120 Digital Computers 120 Microprocessors 123 Hard Drive 123 End of an Era 125 Internet Appliances 125 The Evolution of the Silicon Chip 127 Bluetooth 127 Conclusion 128 Review Questions for Chapter 16 130 17 The Internet 131 Brief History 131 Internet Access 132 Asymmetric Digital Subscriber Line 133 Very High Speed Digital Subscriber Line 134 Integrated Services Digital Network 134 Cable Modems 136 Satellite 137 Local Multipoint Distribution System 138 Circuit Switched vs. Packet Switched 139 Internet Telephony 142 Conclusion 143 Review Questions for Chapter 17 144 18 Lightwave Systems 145 Brief History 145 New Transcontinental Carriers 149 Lightwave Undersea Systems 150 Evolution of Lightwave Systems 150 Optical Fiber Cable 154 Optical Fiber Transmission Parameters 157 Fiber Connectors 163 Optical Emitters 165 Optical Detectors 167 Tunable Lasers 168 All-Optical Networks 169 Dense Wavelength-Division Multiplexing 169 Optical Amplifiers 171 Optical Cross-Connects 173 System Design Considerations 175 Synchronous Optical Network 178 Asynchronous Transfer Mode 186 SONET Ring Networks 190 System Availability 192 Cable Placement Choices 193 Cable Placement Techniques 195 Placement of Underground Cable 196 Placement of Aerial Cable 197 Placement of Direct Buried Cable 199 Field Splicing 203 Mechanical Splicing 205 Field Testing Using an Optical Time Domain Reflectometer 205 Fiber-to-the-Home 209 Video-on-Demand (VOD) 209 Fiber-to-the-Curb 210 Local Area Network 213 Ethernet 214 IBM Token Ring 215 LAN Topology 216 Wireless LANs 218 Fiber Optic LANs 218 Conclusion 224 Review Questions for Chapter 18 225 Telecommunications Glossary 228 Bibliography 250 Index 251 Answers to Review Questions 259 About the Author 269
Subject Areas: Electronics & communications engineering [TJ]
