Abstract

Compared with the digital telephone network in which analog signals are transmitted to the user equipment, the essential technical innovation of ISDN is the digitization of the subscriber line (see Fig. 3.4). The majority of the internationally agreed ISDN specifications (see list of CCITT Recommendations of the I Series in the Annex to this book) on which the following remarks are based therefore deal with subscriber access.

Keywords

Attenuation Assure Expense Dial Adapter 

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Copyright information

© Springer-Verlag Berlin Heidelberg 1992

Authors and Affiliations

  • Peter Bocker
    • 1
  1. 1.Siemens AG, Public Communication Networks GroupCentral LaboratoriesMünchen 70Federal Republic of Germany

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