Digital Switching Control Architectures

By: Giuseppe Fantauzzi

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Hardcover | 1 September 1990

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Hardcover
224 Pages

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24.77 x 16.51 x 1.91

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An introduction to telephone exchange software, its functions and architectures. With continuous reference to the problems and realities of existing systems, this book analyzes hardware and software architectures adopted for the control of telecommunication switching exchanges.

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Non-Fiction Engineering & Technology Electronics & Communications Engineering Communications Engineering & Telecommunications Computing & I.T.Computer Science Computer Architecture & Logic Design Technology in General

Preface	p. xi
Functional Structure of Digital Switching Exchanges	p. 1
Introduction	p. 1
Switching Exchanges and Computers	p. 1
A Canonical Functional Model for the Switching Exchanges	p. 7
Exchange Terminations for Analog Subscriber Lines (B.O.R.S.C.H.T.)	p. 13
Basic Rate Interface Exchange Terminations for ISDN Subscribers	p. 16
Exchange Terminations for Analog Trunks	p. 18
PCM Line Exchange Terminations	p. 20
Exchange Terminations for Common Signaling Channels	p. 25
Exchange Terminations for Data Channels	p. 28
ISDN Primary Rate Interface	p. 28
Circuit-Switching Matrix	p. 29
Packet Switching	p. 31
Testing Devices	p. 32
Intelligent Networks and Additional Subscriber Services	p. 34
Conclusions	p. 35
An Example of Switching Matrices	p. 36
References	p. 40
Application Software for Telephone Switching Exchanges	p. 41
Introduction	p. 41
Signaling Preprocessing and Postprocessing	p. 44
Subscriber Line Signaling	p. 46
Register Signaling	p. 49
Common Channel Signaling	p. 50
Data Links	p. 55
Signaling for ISDN Lines and for X. 75 Packet-Switching Lines	p. 58
Switching Matrix	p. 61
Data Processing Peripherals	p. 62
Testing Devices	p. 63
Circuit-Switched Automatic Calls	p. 64
Main Processes	p. 64
Routing	p. 68
Interworking	p. 73
Charging	p. 76
Semiautomatic Circuit-Switched Calls	p. 78
Tickets and Files	p. 79
Incoming Call Queues	p. 80
Operator Services	p. 82
Ticket Files	p. 84
Application Activities for Semiautomatic Traffic	p. 86
Packet Switching	p. 89
Packet-Switching Functions	p. 89
Packet-Switching Application Software	p. 104
Operation and Maintenance	p. 108
Operation Functions	p. 109
Maintenance Functions	p. 111
Person-Machine Interactions	p. 113
Operation Software	p. 115
Maintenance Software	p. 119
Person-Machine Interaction Software	p. 121
Measuring Procedures	p. 123
Conclusions	p. 126
Alternative Architectures of Digital Switching Systems	p. 129
Introduction	p. 129
Architectures Using Monolithic and Centralized Common Control	p. 130
Regionalized Common Controls	p. 133
Service Computers	p. 137
Segmentation of the Central Control	p. 140
Exploded Architecture for Common Controls: The Case of System 12	p. 145
Modular Exchanges Implemented as Complete, Lossless Networks of Autonomous Switches	p. 148
Networks of Elementary Exchanges Connected by Structures Operating in Circuit and Message Mode	p. 152
Conclusions	p. 156
References	p. 157
Redundant Architectures and Software Quality	p. 159
Introduction	p. 159
Tightly Coupled, Microsynchronized, Central Controls	p. 161
An SDL Architecture for the Software of Switching Exchanges	p. 168
Loosely Coupled Macrosynchronous Controls	p. 175
Central Control with Common Memory	p. 181
Regional Processors	p. 188
Service Computers	p. 189
Software Quality	p. 192
Conclusions	p. 197
References	p. 199
Index	p. 201
The Author	p. 207
Table of Contents provided by Syndetics. All Rights Reserved.

Digital Switching Control Architectures

At a Glance

Hardcover

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