Practical Telecommunications and Wireless Communications (eBook)

Cover 1
Contents 5
Preface 9
1 Introduction to telecommunications 11
1.1 Telecommunications 11
1.2 Principles of telecommunications services 11
1.3 Chapter overview 12
1.4 Telecommunications standards 13
2 Telecommunication basics 15
Objectives 15
2.1 Concepts 15
2.2 Simplex, half-duplex and full-duplex 17
2.3 Modulation techniques 18
2.4 Baseband vs broadband 20
2.5 Narrowband vs wideband 21
2.6 Analog vs digital transmission 22
2.7 Dial-up vs leased access 23
2.8 Multiplexing techniques 24
2.9 Connection orientated vs connectionless communication 26
2.10 Types of transmission 26
2.11 Local vs wide area networks 28
2.12 The PSTN vs the Internet 30
2.13 The open systems interconnection model 30
3 Transmission media 37
Objectives 37
3.1 Introduction 37
3.2 Basic cable transmission parameters 37
3.3 Twisted-pair copper cables 40
3.4 Coaxial cable 47
3.5 Fiber-optic cable 52
3.6 Power system carrier 58
3.7 Microwave radio 59
3.8 Satellite 65
3.9 Infra-red 72
4 The public switched telephone network (PSTN) 73
Objectives 73
4.1 Introduction 73
4.2 Local network 74
4.3 Subscriber plant 74
4.4 Telephone switching infrastructure 77
4.5 Local switches 82
4.6 Subscriber line circuit 83
4.7 Trunk switching 86
4.8 CCITT Signaling System No. 7 90
5 Private switched telephone services 94
Objectives 94
5.1 Private branch exchange 94
5.2 Centrex 97
5.3 Key systems 98
5.4 Computer telephony integration 99
5.5 Other services 103
6 Public transport network technologies 110
Objectives 110
6.1 Overview 110
6.2 Switched analog services 111
6.3 Leased analog data services 117
6.4 Digital transmission hierarchies 119
6.5 Switched digital services 122
6.6 Switched 56 122
6.7 Integrated services digital network (ISDN-BRI) 124
6.8 Frame relay 130
6.9 Switched multi-megabit data services 134
6.10 Asynchronous transfer mode 135
6.11 Digital dedicated circuit (leased) alternatives 138
6.12 Integrated services data network (ISDN-PRI) 140
6.13 Broadband ISDN 142
6.14 X.25 packet switch 143
6.15 Synchronous digital hierarchy (SDH/SONET) 144
7 Broadband customer access technologies 147
Objectives 147
7.1 Overview 147
7.2 Asymmetric digital subscriber line 147
7.3 High-data-rate digital subscriber line 150
7.4 Symmetric digital subscriber line 150
7.5 Very-high-speed digital subscriber line 151
7.6 G.lite (ITU-T G.992.2) 152
7.7 EtherLoop 153
7.8 Hybrid fiber coax 154
7.9 Fiber to the curb 158
7.10 Fiber to the home 159
7.11 Multi-channel multipoint distribution system 161
7.12 Local multipoint distribution system 161
7.13 Bluetooth 162
8 Local and wide area networks 164
Objectives 164
8.1 Introduction 164
8.2 LAN topologies 164
8.3 Media access 170
8.4 LAN standards 173
8.5 LAN extension and interconnecting devices 176
8.6 VLANs 186
8.7 MANs 187
8.8 WANs 187
8.9 VPNs 188
9 Converged networks 190
Objectives 190
9.1 Introduction 190
9.2 Applications 190
9.3 Protocols 191
9.4 Summary 219
9.5 Hardware 219
9.6 Implementation considerations: quality of service 229
10 Cellular wireless communications 232
Objectives 232
10.1 Basic concepts 232
10.2 Cellular analog systems 237
10.3 Digital systems 239
10.4 Wireless data systems 247
10.5 PCS 250
10.6 WAP 252
10.7 3G systems 254
10.8 Terrestrial trunked radio (TETRA) 254
11 Wireless LANs 258
11.1 Introduction 258
11.2 Specifications IEEE 802.11, 802.11b, 802.11a 259
11.3 IEEE 802.11 protocol layer implementation 260
11.4 802.11 Medium access control (MAC) 263
11.5 System components 271
11.6 Basic service set (BSS), extended service set (ESS) 273
11.7 IEEE 802.11 architecture 276
11.8 IP roaming 277
11.9 Security issues 277
11.10 WLANs (wireless local area networks) vs WPANs (wireless personal area networks) 280
11.11 Wireless PANs: Bluetooth/IEEE 802.15 281
11.12 Protocol stack 282
11.13 Piconets and scatternets 283
11.14 Medium access control 284
11.16 Security issues 287
11.17 Using Bluetooth 288
Appendix A: Practical session data 291
Appendix B: Glossary 296
Index 313