Manager's Guide to Telecommunications (eBook)

Front Cover 1
A Manager's Guide to Telecommunications 4
Copyright Page 5
Table of Contents 6
List of illustrations 8
Preface 12
Chapter 1. Communication and computers 14
The development of voice and data transmission 14
A review of data processing 16
A classification of software 22
Chapter 2. Transmission technology and techniques 32
Introduction 32
Communication concepts and techniques 33
Types of conversation 35
Transmission modes 36
Voice and data transmission 37
Line speeds, bandwidth and modulation 38
Baseband and broadband 43
Matching unequal speeds 43
Modems and other data transmission hardware 44
Data transmission media 50
Error detection and correction 54
Chapter 3. Networks and exchanges 57
British Telecom, Mercury and liberalisation 57
The telephone system 58
Switch technologies 62
The PABX 63
Packet switching 68
BT Packet Switchstream facilities 72
Other X-Stream facilities 73
Multistream 74
Integrated services 74
Chapter 4. Telephone and telephone-linked facilities 78
Telephone user facilities 78
Featurephones, telephone systems and exchanges 81
Linkline 0800/0345 85
Voice messaging 86
Call management/logging 87
Tonto/Qwertyphone/Displayphone 90
Cellular telephone 95
Trunked radio 101
Telephone data entry, voice response 102
Chapter 5. Text and document transmission 106
The techniques 106
Data and text 106
Telex 107
Electronic mail 114
Télétex 107
MHS 120
Facsimile transmission (fax) 120
Error indication and auto-disconnect 124
Chapter 6. On-line data base access and viewdata 129
What is viewdata? 129
Types of dialogue 130
Viewdata features 133
Prestel 134
VDU display techniques 136
Viewdata services 139
Private viewdata or Prestel? 141
Corporate viewdata systems 141
Datastream 143
Effem Management Services 144
The Philips HCS 110 148
Chapter 7 Local Area Networks (LANs) 149
What is a Local Area Network (LAN)? 149
Media and transmission techniques 154
Network topologies 154
Access techniques 159
Ethernet, Omninet and Novele 160
Selecting an LAN 162
Appendix 1: Mercury 166
Appendix 2: Northern Telecom 170
Appendix 3: Value-added Networks 172
Appendix 4: Protocols and standards 175
Appendix 5: The ISO 7-layer model 178
Appendix 6: Glossary of useful terms 181
Index 188