222 research outputs found

    NASA and the challenge of ISDN: The role of satellites in an ISDN world

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    To understand what role satellites may play in Integrated Services Digital Network (ISDN), it is necessary to understand the concept of ISDN, including key organizations involved, the current status of key standards recommendations, and domestic and international progress implementation of ISDN. Each of these areas are explained. A summary of the technical performance criteria for ISDN, current standards for satellites in ISDN, key players in the ISDN environment, and what steps can be taken to encourage application of satellites in ISDN are also covered

    Economic analysis of the cost of inconsistencies in the implementation of ISDN network layer standards

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    Case studies depicting ISDN network layer interoperability and standards nonconformance were evaluated, and categorized by type. In each case study the root cause of the interoperability problem was identified, and validated with reference to the applicable ISDN standard. Corrective measures were proposed, and where implemented, the results of the correction were documented. Relative costs associated with the interoperability issue were identified, and recommendation\u27s outlining the best method for avoiding these inconsistencies going forward were presented

    From diversity to convergence : British computer networks and the Internet, 1970-1995

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    The Internet's success in the 21st century has encouraged analysts to investigate the origin of this network. Much of this literature adopts a teleological approach. Works often begin by discussing the invention of packet switching, describe the design and development of the ARPANET, and then examine how this network evolved into the Internet. Although the ARPANET was a seminal computer network, these accounts usually only briefly consider the many other diverse networks that existed. In addition, apart from momentary asides to alternative internetworking solutions, such as the Open Systems Interconnection (OSI) seven-layer reference model, this literature concentrates exclusively on the ARPANET, the Internet, and the World Wide Web. While focusing on these subjects is important and therefore justified, it can leave the reader with the impression that the world of networking started with the ARPANET and ended with the Internet. This thesis is an attempt to help correct this misconception. This thesis analyses the evolution of British computer networks and the Internet between the years 1970 and 1995. After an introduction in Chapter 1, the thesis analyses several networks. In Chapters 2 and 3, the focus is on academic networks, especially JANET and SuperJANET. Attention moves to videotex networks in Chapter 4, specifically Prestel, and in Chapter 5, the dissertation examines electronic mail networks such as Telecom Gold and Cable & Wireless Easylink. Chapter 6 considers online services, including CompuServe, American Online, and the Microsoft Network, and the thesis ends with a conclusion in Chapter 7. All of the networks discussed used protocols that were incompatible with each other which limited the utility of the networks for their users. Although it was possible that OSI or another solution could have solved this problem, the Internet's protocols achieved this objective. This thesis shows how the networks converged around TCP/IP

    Cooperative Standard Setting: The Road to Compatibility or Deadlock? The NAFTA\u27s Transformation of the Telecommunications Industry

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    In an effort to reduce nontariff barriers, the North American Free Trade Agreement (NAFTA) directs its three member nations to utilize product standards set by international standard-setting organizations. What were once considered permissible standards are now mandatory standards as Articles 904-906 of the NAFTA mandate the telecommunications industry to adopt cooperative standard-setting by these organizations as the sole method to achieve standardization. Currently, the International Telecommunications Organization and the International Organization for Standardization are the two principal cooperative standardization organizations in the telecommunications industry. This Note argues that the NAFTA should allow members to opt out of the requirement for reliance on the standards developed by international standard-setting organizations. Delays in the standardization process increase costs. In addition, the political battles waged within these organizations do no always create the best standardization result. This Note argues for a two-year reliance period on international standardization organizations to achieve a result. If, at the end of that period, no standard emerges, then the NAFTA members could rely on regional standards. In addition, there must be structural reform within the international standard-setting organizations to reduce the costly delays and political problems
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