On Distributed Communications

VII. Tentative Engineering Specifications and Preliminary Design for a High-Data-Rate Distributed Network Switching Node

by Paul Baran


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One in a series of eleven memoranda detailing the Distributed Adaptive Message Block Network, a proposed digital data communications system based on a distributed network concept. It considers the engineering specifications of the proposed system's switching node. It is felt that a small, unmanned switching node (yet having higher throughput rates than current large installations occupying thousands of square feet and requiring many people to maintain operations) can be built. The network proposal revolves around the feasibility of using this small, unmanned switching node.

Table of Contents

  • Preface

  • Summary

  • Acknowledgments

  • Figures

  • Tables

  • Part One

    General Specifications

  • Chapter A


  • Chapter B


  • Chapter C

    Number of Connecting Links

  • Chapter D

    Major Elements

  • Chapter E

    Failure Propagation

  • Chapter F

    Cryptographic Provisions

  • Chapter G


  • Chapter H

    Servicing Provisions

  • Chapter I

    Error Rate

  • Chapter J

    Link and Link Unit Specification

  • Part Two

    Implementation Proposal

  • Chapter One

    Detailed Flow Charts

  • Chapter Two

    Central Processor Description

  • Chapter Three

    Internode Timing Considerations

  • Chapter Four


  • List of Publications in the Series

This research is sponsored by the United States Air Force under Project RAND-Contract No. AF 49(638) .700 monitored by the Directorate of Development Plans. Deputy Chief of Staff. Research and Development. Hq USAF.

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