Communications technology guide for business:
Gespeichert in:
| Hauptverfasser: | , , |
|---|---|
| Format: | Buch |
| Sprache: | English |
| Veröffentlicht: |
Boston [u.a.]
Artech House
1998
|
| Schriftenreihe: | Artech House telecommunications library
|
| Schlagworte: | |
| Online-Zugang: | Inhaltsverzeichnis |
| Beschreibung: | XXVI, 408 S. Ill., graph. Darst. |
| ISBN: | 0890068275 |
Internformat
MARC
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| 084 | |a ST 200 |0 (DE-625)143611: |2 rvk | ||
| 100 | 1 | |a Downey, Richard |e Verfasser |4 aut | |
| 245 | 1 | 0 | |a Communications technology guide for business |c Richard Downey ; Seán Boland ; Philip Walsh |
| 264 | 1 | |a Boston [u.a.] |b Artech House |c 1998 | |
| 300 | |a XXVI, 408 S. |b Ill., graph. Darst. | ||
| 336 | |b txt |2 rdacontent | ||
| 337 | |b n |2 rdamedia | ||
| 338 | |b nc |2 rdacarrier | ||
| 490 | 0 | |a Artech House telecommunications library | |
| 650 | 4 | |a telekomunikacijska tehnika - telekomunikacijske storitve - telekomunikacijska omrežja - omrežja LAN - omrežja WAN - Internet - mobilne telekomunikacije - cene storitev | |
| 650 | 4 | |a Wirtschaft | |
| 650 | 4 | |a Business -- Communication systems | |
| 650 | 4 | |a Information technology -- Equipment and supplies | |
| 650 | 4 | |a Internet | |
| 700 | 1 | |a Boland, Seán |e Verfasser |4 aut | |
| 700 | 1 | |a Walsh, Philip |e Verfasser |4 aut | |
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| 999 | |a oai:aleph.bib-bvb.de:BVB01-008275339 | ||
Datensatz im Suchindex
| _version_ | 1804126829041156096 |
|---|---|
| adam_text | Contents
Preface xxi
Acknowledgments xxv
Part I: Technology
1 Communication Services and Networks 1
1.1 Introduction 1
1.2 Function of Communications Technology 2
1.2.1 Types of Connectivity 2
1.2.2 Cost of Connectivity 2
1.2.3 Scope of Connectivity 3
1.3 Communications Technology and Business 4
1.3.1 Some Communication Enabled Companies 5
1.4 Developing Communication Solutions 8
References 9
2 Communication Principles 11
2.1 Introduction 11
2.2 Analog and Digital 11
2.2.1 Bandwidth 12
2.2.2 Conversion of Information Into Digital Format 12
v
vi Communications Technology Guide for Business
2.2.3 Bandwidth Requirements 15
2.2.4 Digital and Analog Compared 15
2.3 Networks 17
2.3.1 Communication Links 17
2.3.2 Communication Media 18
2.3.3 Switches, Routers, and Nodes 22
2.3.4 Network Topology 23
2.4 Public Networks 25
2.4.1 Examples of Public Networks 25
2.4.2 Characteristics of Switched Public Networks 26
2.4.3 Access to Public Networks 27
2.5 Standards 28
References 29
3 PBXs 31
3.1 Introduction 31
3.1.1 A Key Component in any Communications
Strategy 32
3.1.2 PBXs, Key Systems, and Hybrids 32
3.1.3 PBXs Versus the PSTN 32
3.2 PBX Structure 33
3.2.1 Analog Versus Digital 33
3.2.2 Telephones (Stations) 34
3.2.3 Cabling 35
3.2.4 Switching 35
3.2.5 Processor 36
3.2.6 Trunks 36
3.3 PBX Networking 38
3.3.1 Break In and Break Out 38
3.3.2 Mixed Networks 39
3.3.3 Signaling Between PBXs 40
3.4 General PBX Features 41
3.4.1 User Features 41
3.4.2 System Features 41
Contents vii
3.4.3 PSTN Facilities 43
3.5 Advanced Features 44
3.5.1 Automatic Call Distribution 44
3.5.2 Wireless Capability 44
3.5.3 Voice Messaging 45
3.5.4 Voice Mail 45
3.5.5 Direct Inward System Access 46
3.5.6 Data Communications Over PBX 46
3.5.7 Computer Telephony Integration 47
3.5.8 ISDN Capability 48
3.6 Network Management 49
3.6.1 Feature Administration 49
3.7 PBX Security 49
3.8 PBX Dimensioning 51
3.8.1 Number of Extensions 51
3.8.2 Number of Trunks 51
3.8.3 Traffic (Erlangs and CCS) 52
3.8.4 Processor Capacity 53
3.8.5 Power Supply Requirements 53
Reference 54
4 Local Area Networks 55
4.1 Introduction 55
4.2 Benefits of a LAN 55
4.2.1 Connectivity 55
4.2.2 Resource Sharing 56
4.2.3 Information Sharing—The Key Benefit 56
4.2.4 File and Record Locking 57
4.3 LAN Types 57
4.3.1 Ethernet and Token Ring 57
4.3.2 Radio LANs 58
4.4 Parts of a LAN 59
4.4.1 Cabling 59
viii Communications Technology Guide for Business
4.4.2 Structured Cabling 62
4.4.3 Repeaters 62
4.4.4 Workstations 63
4.4.5 Network Interface Cards 64
4.4.6 Terminal Server 64
4.4.7 Servers 64
4.5 Software 66
4.5.1 Network Operating System 66
4.5.2 The LAN Requester 67
4.5.3 Application Software 68
4.5.4 The Development of Client/Server Computing 68
4.6 Hierarchical Versus Peer to Peer 70
4.7 Network Management 70
4.7.1 The Functions of the Network Manager 70
4.7.2 Simple Network Management Protocol 71
4.8 Shared Resources 71
4.9 Increasing LAN Capacity 72
4.9.1 Local Bridges 72
4.9.2 Switching 73
4.9.3 High Speed LANs 73
References 75
Further Reading 76
5 The Telephone Network 77
5.1 Introduction 77
5.2 Transmission 78
5.2.1 Time Division Multiplexing 79
5.2.2 European Transmission Systems 80
5.2.3 Other Transmission Systems 81
5.2.4 Synchronous Digital Hierarchy 81
5.2.5 Transmission Media 82
5.3 The Switching Network 83
5.3.1 Introduction 83
Contents ix
5.3.2 Exchange Layout 83
5.3.3 Analog Exchanges 86
5.3.4 Digital Exchanges 87
5.3.5 Switching Hierarchy 89
5.3.6 Signaling 90
5.4 The Local Access Network 94
5.4.1 Traditional Layout 94
5.4.2 Radio in the Access Network 97
5.4.3 Optical Fiber in the Local Network 99
5.4.4 Cable Television 100
References 101
Further Reading 101
6 ISDN 103
6.1 Introduction 103
6.2 Definition 104
6.2.1 Interpretation of Definition 104
6.3 Access to the ISDN 106
6.3.1 Channel Types 106
6.3.2 Basic Rate Access 107
6.3.3 Primary Rate Access 108
6.4 Terms and Explanations 109
6.4.1 Reference Configuration 109
6.4.2 Network Termination Type 1 109
6.4.3 Network Termination Type 2 110
6.4.4 Terminal Adapter 110
6.4.5 Terminal Equipment 111
6.4.6 S Bus 112
6.4.7 Power for NTs and TAs 113
6.5 ISDN Services 113
6.5.1 Bearer Services 113
6.5.2 Teleservices 115
6.5.3 Supplementary Services 115
x Communications Technology Guide for Business
6.6 Applications 119
6.6.1 Introduction 119
6.6.2 Speech and Audio Applications 119
6.6.3 Remote Access and Internet Access 121
6.6.4 LAN Interconnection 123
6.6.5 Video telephony 124
6.6.6 File Transfer 124
6.6.7 Group 4 Facsimile 125
6.6.8 Database Indexing 125
6.7 Interworking 126
6.7.1 ISDN PSTN Interworking 126
6.7.2 ISDN X.25 Interworking 127
6.7.3 International ISDN Interworking 129
6.8 ISDN Development and Deployment 130
6.8.1 Development of an ISDN Network 130
6.8.2 Functionality 133
References 134
7 Public Data Networks 137
7.1 Introduction 137
7.1.1 Uses of Data Networks 137
7.1.2 Data Over the PSTN 139
7.2 Leased Lines 139
7.2.1 Digital Leased Line Speeds 140
7.2.2 Leased Line Reliability 140
7.3 Data Networks in General 141
7.3.1 Variety of Data Network Types 141
7.3.2 Nature of Data Traffic 141
7.3.3 Packet , Frame , and Cell Switched Networks 142
7.3.4 Circuit Switched Networks 143
7.4 Understanding Data Networks 143
7.4.1 Logical Channels 143
7.4.2 Virtual Circuits 144
Contents xi
7.4.3 Communication Protocols 145
7.4.4 Connection Oriented and Connectionless
Services 148
7.5 X.25 Packet Switched Networks 149
7.5.1 Background 149
7.5.2 Direct Connections 149
7.5.3 Connecting a LAN to an X.25 Network 151
7.5.4 Connecting Mainframes to X.25 Networks 152
7.5.5 Charging 152
7.5.6 Typical Uses of X.25 Networks 153
7.5.7 Other Features and Facilities of X.25 Networks 153
7.6 Frame Relay 154
7.6.1 Background 154
7.6.2 Basic Concepts 154
7.6.3 Typical Setup 157
7.6.4 Sample Application and Cost Calculation 158
7.7 Switched Multimegabit Digital Service 159
7.7.1 Background 159
7.7.2 Applications 160
7.7.3 Connection to an SMDS Network 161
7.7.4 SMDS Versus Frame Relay 161
7.8 Asynchronous Transfer Mode 162
7.8.1 Background 162
7.8.2 Network Operation 163
7.9 VSAT Networks 166
7.9.1 Types of VSAT Networks 166
7.10 Security of Public Data Networks 167
References 168
Further Reading 168
8 The Internet 169
8.1 Background 169
8.2 Connecting to the Internet 170
8.2.1 The Single User Connection 170
xii Communications Technology Guide for Business
8.2.2 Corporate Connections to the Internet 171
8.3 Network Operation 173
8.3.1 A Network of Networks 173
8.3.2 ISPs and Backbones 173
8.3.3 Bandwidth 174
8.3.4 Other IP Networks 174
8.4 Internet Applications 174
8.4.1 World Wide Web 174
8.4.2 Email 178
8.4.3 Telnet 178
8.4.4 News Groups 178
8.4.5 Voice and Video 179
8.4.6 Fax 179
8.4.7 Internet VPNs 180
8.4.8 Intranets 180
8.5 Addresses and Domain Names 181
8.6 Security 182
8.6.1 Firewalls 182
8.6.2 Access Control 183
8.6.3 Encryption 183
References 185
Further Reading 185
9 Mobile Communication 187
9.1 Introduction 187
9.1.1 Mobile Phones and Cordless Phones 187
9.1.2 Mobile Versus Wire Lines 188
9.1.3 History 188
9.1.4 Developing Countries 189
9.2 Principles 190
9.2.1 Radio Communication Jargon 190
9.2.2 The Cellular Concept 193
Contents xiii
9.2.3 Analog Versus Digital 196
9.2.4 Speech Quality 197
9.2.5 Charging 198
9.2.6 Coverage 199
9.2.7 Security 199
9.3 Network Services 200
9.3.1 Roaming 200
9.3.2 Data and Fax 203
9.3.3 Short Message Service 204
9.3.4 Video 205
9.3.5 Vehicle Tracking 205
9.4 Handset Technologies 205
9.4.1 Handset Features 205
9.4.2 Hands Free Operation 206
9.4.3 Power Class 206
9.4.4 Batteries 206
9.5 Networks Technologies 207
9.5.1 Europe 207
9.5.2 United States 209
9.5.3 Japan 211
9.5.4 Cordless Telephony 212
9.5.5 Mobile Data Networks 214
9.5.6 Satellite Based Mobile Communications 217
9.6 Paging 218
9.6.1 European Radio Messaging Service 219
9.6.2 Satellite Based Paging Systems 219
References 219
10 Value Added Services 221
10.1 Value Added Services 221
10.2 Information Access Services 221
10.2.1 Freephone 221
xiv Communications Technology Guide for Business
10.2.2 Videotex! 223
10.2.3 Premium Rate Services 223
10.2.4 Online Databases 224
10.3 Messaging and Transactional Services 224
10.3.1 Electronic Mail 224
10.3.2 Electronic Data Interchange 227
10.3.3 Electronic Funds Transfer 229
10.3.4 Electronic Funds Transfer at Point of Sale 229
10.3.5 Voice Mail 229
10.3.6 Fax Store and Forward 230
10.4 Virtual Private Networks 230
10.4.1 Benefits of VPNs 231
10.4.2 Centrex 232
10.5 Intelligent Network 233
10.5.1 Operation of an IN 234
10.5.2 Advantages of IN 235
References 235
11 Communication Equipment 237
11.1 Introduction 237
11.2 Modems 237
11.2.1 Fax Modems 238
11.2.2 Modem Standards 239
11.2.3 Modem Speeds 240
11.2.4 Data Compression 242
11.2.5 Error Correcting Modems 243
11.2.6 Selecting a Modem 243
11.3 Multiplexers 248
11.3.1 Time Division Multiplexers 248
11.3.2 Statistical Multiplexers 250
11.3.3 Dynamic Bandwidth Allocation to Voice 251
11.3.4 Speech Quality Issues 251
11.4 Network Terminating Unit 253
Contents xv
11.4.1 Ownership 254
11.4.2 Tl CSU/DSUs and El NTUs 254
11.5 Communication Equipment for Mainframe
Computers 255
11.6 Compression Equipment 256
11.7 Video Communication 258
11.7.2 Standards 259
11.7.3 Multiparty Conferences 261
11.7.4 Leasing of Videoconferencing Facilities 261
11.8 Type Approval 262
References 262
12 LAN Interconnect 265
12.1 Introduction 265
12.1.1 Internetwork 265
12.1.2 LAN Interconnect Equipment 265
12.2 Combating the Deficiencies of WAN Links 267
12.2.1 Spoofing 267
12.2.2 Configuring Applications for the WAN 268
12.2.3 Choosing Between Communication Services 269
12.3 Addressing 269
12.3.1 Internet Packet Exchange Addressing 271
12.3.2 IP Addressing 272
12.3.3 IP Version 6 (IPv6) 274
12.3.4 Domain Name System and Network Information
System 274
12.4 Bridges 274
12.4.1 Transparent Bridges 275
12.4.2 Transit Bridges 276
12.4.3 Source Route Bridges 276
12.4.4 Bridging Ethernet and Token Ring 276
12.4.5 Bridges and Network Resilience 277
12.5 Routers 278
12.5.1 Routing Protocols 279
xvi Communications Technology Guide for Business
12.5.2 Default Gateways 281
12.5.3 Brouters 282
12.5.4 To Bridge or To Route? 283
12.6 Gateways 284
12.6.1 SNA Gateway 285
12.6.2 Email Gateway 285
12.7 Network Management Systems 286
12.7.1 SNMP 287
12.7.2 MIB I and MIB II 287
References 287
Part II: Managing Business Solutions 13 A Business Approach to Communication 289
13.1 Introduction 289
13.1.1 The Expanding Role of Communications
Technology 289
13.1.2 Communication Is a Business Issue 290
13.1.3 A Communication Strategy 291
13.1.4 Communication as Part of a Strategic Review
Process 293
13.2 Enabling Role of Communications Technology 293
13.2.1 Time, Place, and Language Independence 294
13.2.2 New Workforce Profile 294
13.2.3 New Working Methods 295
13.3 Identifying Options To Maximize Business
Advantage 296
13.3.1 Forming a Team 296
13.3.2 Studying the Business 297
13.3.3 Sources of Information 300
13.4 Review 302
13.5 Scope 303
13.6 The Business Case 305
13.6.1 Time Span 306
Contents xvii
13.6.2 Typical Business Case 307
References 310
Further Reading 310
14 Developing a Communication Solution 311
14.1 Introduction 311
14.2 Communications Technology as a Service 311
14.2.1 Service Levels 312
14.2.2 Service Availability 314
14.2.3 Charging for Services 315
14.3 Specifying Communication Requirements 316
14.3.1 Writing a Business Specification 316
14.3.2 Optimal Business Solution 317
14.3.3 Advantages of Standardization 318
14.4 Specifying Technical Requirements 319
14.4.1 Network Performance Criteria 319
14.4.2 Impact of Technology 320
14.4.3 Future Proofing 323
14.4.4 Availability Considerations 325
14.4.5 Flexible Access Systems 326
14.4.6 Technical Specification 328
14.5 Communication Outsourcing 330
14.5.1 Why Outsource? 330
14.5.2 Arguments Against Outsourcing 331
14.5.3 Reaching a Decision 332
References 332
Further Reading 333
15 Supplier Selection and Management 335
15.1 How Many Suppliers? 335
15.1.1 Contract Duration 336
15.2 External SLAs 337
15.2.1 Typical Structure 337
15.2.2 Service Definition 338
xviii Communications Technology Guide for Business
15.2.3 Performance Criteria 338
15.2.4 Service Support 339
15.3 Going to Tender 340
15.3.1 Executive Overview 341
15.3.2 Introduction 341
15.3.3 Tendering Procedure 342
15.3.4 Requirements Specification 343
15.3.5 Implementation and Testing 343
15.3.6 Charges 344
15.3.7 Appendixes 344
15.4 Selecting Suppliers 346
15.4.1 Generating a Short List 347
15.4.2 Supplier s Business Strategy 347
15.4.3 Product Support Facilities 348
15.4.4 Reference Customers 351
15.5 Contractual Issues 352
15.5.1 General Provisions 352
15.5.2 Pricing Policy 353
15.5.3 Confidentiality Clause 354
15.5.4 Liability for Fraud 354
15.5.5 Software Licenses 355
15.5.6 Multiple Suppliers 355
15.5.7 Exit Mechanism 355
15.5.8 Attachments to the Contract 356
15.5.9 Outsourcing Contracts 357
15.6 Ongoing Supplier Management 358
15.6.1 Managing Diverse Suppliers 359
References 359
16 Tariffs 361
16.1 Introduction 361
16.2 Comparison of Options 362
16.3 Components of a Tariff 363
Contents xix
16.3.1 PSTN Tariffs 364
16.3.2 Cellular 367
16.3.3 Paging 368
16.3.4 ISDN 368
16.3.5 Leased Lines 369
16.3.6 Packet Switching 372
16.3.7 Frame Relay 374
16.3.8 Internet 374
16.3.9 SMDS 375
16.3.10 ATM 375
16.4 Detailed Billing 376
16.5 Tariff Comparisons 376
16.5.1 Basket of Calls 376
16.5.2 Break Even Analysis 377
16.6 Tariff Trends 379
16.7 Sources of Tariff Information 382
References 382
Glossary 383
About the Authors 391
Index 393
|
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| record_format | marc |
| series2 | Artech House telecommunications library |
| spelling | Downey, Richard Verfasser aut Communications technology guide for business Richard Downey ; Seán Boland ; Philip Walsh Boston [u.a.] Artech House 1998 XXVI, 408 S. Ill., graph. Darst. txt rdacontent n rdamedia nc rdacarrier Artech House telecommunications library telekomunikacijska tehnika - telekomunikacijske storitve - telekomunikacijska omrežja - omrežja LAN - omrežja WAN - Internet - mobilne telekomunikacije - cene storitev Wirtschaft Business -- Communication systems Information technology -- Equipment and supplies Internet Boland, Seán Verfasser aut Walsh, Philip Verfasser aut HBZ Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=008275339&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Downey, Richard Boland, Seán Walsh, Philip Communications technology guide for business telekomunikacijska tehnika - telekomunikacijske storitve - telekomunikacijska omrežja - omrežja LAN - omrežja WAN - Internet - mobilne telekomunikacije - cene storitev Wirtschaft Business -- Communication systems Information technology -- Equipment and supplies Internet |
| title | Communications technology guide for business |
| title_auth | Communications technology guide for business |
| title_exact_search | Communications technology guide for business |
| title_full | Communications technology guide for business Richard Downey ; Seán Boland ; Philip Walsh |
| title_fullStr | Communications technology guide for business Richard Downey ; Seán Boland ; Philip Walsh |
| title_full_unstemmed | Communications technology guide for business Richard Downey ; Seán Boland ; Philip Walsh |
| title_short | Communications technology guide for business |
| title_sort | communications technology guide for business |
| topic | telekomunikacijska tehnika - telekomunikacijske storitve - telekomunikacijska omrežja - omrežja LAN - omrežja WAN - Internet - mobilne telekomunikacije - cene storitev Wirtschaft Business -- Communication systems Information technology -- Equipment and supplies Internet |
| topic_facet | telekomunikacijska tehnika - telekomunikacijske storitve - telekomunikacijska omrežja - omrežja LAN - omrežja WAN - Internet - mobilne telekomunikacije - cene storitev Wirtschaft Business -- Communication systems Information technology -- Equipment and supplies Internet |
| url | http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=008275339&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
| work_keys_str_mv | AT downeyrichard communicationstechnologyguideforbusiness AT bolandsean communicationstechnologyguideforbusiness AT walshphilip communicationstechnologyguideforbusiness |