Iowa State University Capstones, Theses and Retrospective Theses and Dissertations Dissertations 1991 Design of an ISDN central office, U-interface Timothy N. Toillion Iowa State University Follow this and additional works at: https://lib.dr.iastate.edu/rtd Part of the Digital Circuits Commons, Digital Communications and Networking Commons, and the Signal Processing Commons Recommended Citation Toillion, Timothy N., "Design of an ISDN central office, U-interface" (1991). Retrospective Theses and Dissertations. 16968. https://lib.dr.iastate.edu/rtd/16968 This Thesis is brought to you for free and open access by the Iowa State University Capstones, Theses and Dissertations at Iowa State University Digital Repository. It has been accepted for inclusion in Retrospective Theses and Dissertations by an authorized administrator of Iowa State University Digital Repository. For more information, please contact
[email protected]. Design of an ISDN central office, U-interface by Timothy N. Toillion A Thesis Submitted to the Graduate Faculty in Partial Fulfillment of the Requirements for the Degree of MASTER OF SCIENCE Department: Electrical Engineering and Computer Engineering Major: Computer Engineering Signatures have been redacted for privacy Signatures have been redacted for privacy Iowa State University Ames, Iowa 1991 Copyright @ Timothy N. Toillion, 1991. All rights reserved. 11 TABLE OF CONTENTS INTRODUCTION. .. 1 CHAPTER 1. THE EVOLUTION OF TELECOMMUNICATIONS 4 Telephone Communications .. 4 Inventions Spawn Growth 4 Modern Telecommunication Networks. 8 Telecommunications ......... 11 Definition of Telecommunication. 11 Other Forms of Telecommunication 11 Integration of Services . 12 Evolution of the Concept . 12 The Evolution of ISDN .. 15 CCITT's Standards . 15 Major Set back. 16 Evolution of Products and Services 16 CHAPTER 2.