ISDN - digital networks integrated in service

The book discusses the methods of computer data transmission as well as the structure and functioning of ISDN (digital telecommunications networks). The individual elements of such networks are described and examples of subscriber subnetwork structures are given, multi-access mechanisms to the common signaling channel as well as the ST-BUS standard and examples of solutions of basic ISDN network devices are given.

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Table of Contents:
Introduction 8
Introduction 10
1. DIGITAL TELEPHONE NETWORKS 13
1.1. Pulse-code modulation PCM 14
1.2. Time multiplexing 30
1.3. Spatial switching 33
1.4. Time commutation 36
1.5. Transmission in isochrone mode 39
2. TELECOMMUNICATIONS NETWORKS WITH THE COMMUNICATION OF PACKAGES 41
2.1. Statistical multiplexing 41
2.2. Route selection 47
2.3. Datagram and virtual connection mode 56
2.4. Flow control in a packet network 60
2.4.1. Interwater control 62
2.4.1.1. Buffer management methods 62
2.4.1.2. The classification of packets according to the distance traveled 67
2.4.1.3. Packet classification by virtual connection 68
2.4.2. Flow control in relation to the source pole-target pole 69
2.4.3. Controlling access to the network 70
2.5. Summary of transmission properties in packet mode 71
3. BASIC FEATURES AND LOGICAL STRUCTURE OF THE ISDN NETWORK 73
3.1. Bandwidth allocated to the subscriber of the lSDN network 74
3.1.1. Basic access to the lSDN network 74
3.1.2. Primary access 76
3.3.2. Tasks implemented by individual layers 87
3.3.3. Reference model for the ISDN network 94
4. STRUCTURE OF ISDN NETWORK USER EQUIPMENT 96
4.1. Terminals and their types 99
4.2. Subscriber equipment configurations 103
4.3. Logical user contact with the network 107
5. CHARACTERISTIC OF CONTACT U 110
5.1. Echo cancellation technique 111
5.2. Transmission code 117
5.3. The frame structure at the U 118 interface
5.4. Activation and deactivation of U 120 contact
5.5. Contact U '123
6. STRUCTURE OF CONTACT S and T 125
6.1. Transmission code and information framing on contacts S and T 127
6.2. Activation of contacts S and T 134
7. PROTOCOL OF THE LAYER OF THE SECOND SIGNAL CHANNEL 139
7.1. Transmission protocol of the second layer 139
7.2. Multi-access to signaling channel 141
7.2.1. Priority system for access to channel D 144
7.2.2. Conflict detection 147
7.3. Secondary communication protocol 149
7.3.1. Frame format LAP D 150
7.3.2. Principles of cooperation between the second and third layers 162
8. CONTACT R ACCESSIBLE ACCESS 165
8.1. Digital data transmission in the ISDN network 165
8.1.1. Types of TA 167 blocks
8.1.2. Tasks of computer terminal adapters 169
8.1.3. The methods used to transcode information 172
8.2. Bitwise stuffing coding 172
8.2.1. Adaptation of speed 172
8.2.2. Frame structure 174
8.2.3. Multiplexing of connections in the foundation channel 179
8.2.4. Listing of coding properties by bitwise 180
8.3. Transmission via channel B in packet mode 181
8.3.1. Packet data transmission modes in channel B 181
8.3.2. Statistical multiplexing 181
8.3.3. Layer model of adapter 184
8.3.4. Sub-terminal adaptation 187
8.3.4.1. Operation in asynchronous mode 190
8.3.4.2. Work in synchronous mode HDLC 193
8.3.4.3. Work in bit transparent 196
8.3.5. The process of making a call 197
8.3.5.1. Identification of logical channels 197
8.3.5.2. The process of setting up logical connection 198
8.3.6. Synchronization of terminal clocks 200
8.3.7. List of transmission properties in packet mode 202
8.4. TEM 203 modulation
8.4.1. The use of TEM modulation to encode the data stream from connector V.24 204
8.4.2. Transferring the control signals of the R 210 contact
8.4.3. List of digital data transmission properties using TEM 214 modulation
9. SS7 SIGNALING SYSTEM 216
9.1. The logical structure of the SS7 218 system
9.2. Signaling link 221
9.3. Signal arch 222
9.4. Network part 227
9.5. The part of control signaling connections 230
9.6. Supporting transactions 231
9.7. Some ISDN 232 users
10. ST-BOUS - STANDARD CONNECTION OF ITEMS IN ISDN NETWORK BLOCKS 239
10.1. The basic format of the ST -BUS 240 frame
10.2. Switching matrix 245
10.3. Control of actuators 249
10.4. Interprocessor communication 252
Literature 254