J. R. Brewster

ISDN Technology

• Gebundenes Buch

Produktbeschreibung

The Integrated Services Digital Network (ISDN) represents the current position in about a hundred years of evolutionary growth of the worldwide telecommunications infrastructure. This evolution is by no means complete and the next few years will see the emergence of a "Broad-band" ISDN as the next stage of evolutionary development. It is important to appreciate the evolutionary nature of the telecommunications infrastructure if one is to properly understand much of the thinking that lies behind the current ISDN proposals. This book therefore begins with a number of chapters devoted to a study of the various developments which have eventually led to the concept of an integrated digital network. These include the development of digital transmission of speech using PCM and the development of digital switching techniques based on stored program control. The book then turns to a consideration of those features of the existing telecommunications network which need to be modified in order to make ISDN a realizable practicality. Of particular importance is the digitization of transmission over the links between the user and the local exchange. Next we look at the current practice and proposals for ISDN based on the technology presently in use in the telephone network. Finally, we look at the proposals for a broadband ISDN likely to become widely available by the turn of the century.

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Produktdetails

• Verlag: Springer / Springer Netherlands
• Artikelnr. des Verlages: 978-0-412-43180-7
• Repr. d. Ausg. v. 1992
• Seitenzahl: 144
• Erscheinungstermin: 31. Dezember 1992
• Englisch
• Abmessung: 241mm x 160mm x 13mm
• Gewicht: 381g
• ISBN-13: 9780412431807
• ISBN-10: 0412431807
• Artikelnr.: 23080521

Inhaltsangabe

1 Introduction.- 1.1 Preamble.- 2 Pulse code modulation.- 2.1 Introduction.- 2.2 Sampling.- 2.3 Quantization.- 2.4 Companding.- 2.5 PCM frame structures.- 2.6 Signalling and synchronization.- 2.7 Choice of line code.- 2.8 PCM digital multiplexing hierarchy.- 3 Digital switching.- 3.1 Introduction.- 3.2 The cross-point switching matrix.- 3.3 Two-stage switching networks.- 3.4 Three-stage and non-blocking switching networks.- 3.5 Digital switching.- 4 Packet switched networks.- 4.1 Introduction.- 4.2 OSI protocol model.- 4.3 X25 and HDLC.- 5 Integrated Digital Network.- 5.1 Introduction.- 5.2 Signalling system No.7.- 6 Digital Local Access.- 6.1 Introduction.- 6.2 Burst mode.- 6.3 Hybrid multiplex with echo cancellation.- 6.4 The need for scrambling.- 6.5 Pseudo-random binary sequences.- 6.6 Self-synchronizing scramblers/descramblers.- 6.7 The 2B1Q scrambler descrambler.- 7 ISDN services and protocols.- 7.1 ISDN standards.- 7.2 The user-network interface.- 7.3 Basic rate access.- 7.4 LAP-D.- 7.5 Network (layer 3) protocol.- 7.6 Primary rate access.- 7.7 Supplementary services.- 8 Broadband ISDN.- 8.1 Introduction.- 8.2 Synchronous digital hierarchy.- 8.3 User access to broadband ISDN.- 9 ATM.- 9.1 Frame relay.- 9.2 Fast packet switching and ATD.- 9.3 ATM.- 9.4 Adaptation layer.- 9.5 Quality of Service.- 9.6 Call acceptance control.- 9.7 Admission control.- 9.8 Source policing.- 9.9 Congestion control.- 9.10 ATM network resource allocation.- 9.11 ATM transmission over SDH.- 10 Integrated network services.- 10.1 Introduction.- 10.2 Services over narrowband ISDN.- 10.3 Services over broadband ISDN.- Appendix A CCITT Recommendations for ISDN.- Appendix B Glossary of acronyms.- Further reading.