Proceedings

An experimental switching system has been built using commercially available integrated semiconductors to switch data. Data messages to be handled by the system may vary in bit rate (100 bits/sec - 4 × 10⁶ bits/sec), message length, and rate of message ...

Data and encoded voice signals differ in certain characteristics which require, if switching is the goal, slightly different approaches. Some of the characteristics of digitized speech and data are compared

This paper describes an operating experimental ...

Design considerations for statistical multiplexors with Poisson message arrivals and the following three types of messages are considered: 1) constant length messages, 2) random length messages, and 3) segmented random length messages with fixed-size ...

There are more than one hundred troposcatter systems of various sizes in existence all over the world.¹ As the transmission of computer data becomes more and more in common and popular demand, such systems are certain to be involved in these services.

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The development of rapid algorithms for computation of the discrete Fourier transform has encouraged the use of this transform in the design of communication systems. Here we describe and analyze a data transmission system in which the transmitted ...

A model is given for selection of optimum bit speed for private line data communications applications based on the tradeoff between the cost of delay and the cost of equipment. Costs of delay are those costs incurred by the communications user which ...

A general purpose store-and-forward data communication network is under development at NPL. The background to this work is described in companion papers⁽¹⁾⁽²⁾ which also detail the hardware environment in which the software of the central message ...

This paper, together with its companions⁽¹⁾⁽²⁾ describes the experimental data communication network being implemented at the National Physical Laboratory. The purpose of the work is two-fold.

Firstly, it will act as a model of the 'local area' network ...

A study of multiaccess computer communications has characterized the distributions underlying an elementary model of the user-computer interactive process. The model used is elementary in the sense that many of the random variables that generally are of ...

The purpose of this paper is to analyze some of the legal problems faced by the computer industry in the area of assuring privacy and security of data both during transmission and storage and to propose a solution. The focus of the paper is upon recent ...

The new British Standard Specification⁽¹⁾ 4421 entitled “A Digital Input/Output Interface for Data Collection Systems” is gaining wide recognition in the United Kingdom and has been submitted to the International Standards Organisation for International ...

Realizing the need for a highly adaptable transmission control unit to interface varied terminal equipment to the Michigan Timesharing System (MTS), the University of Michigan initiated in 1965 the development of a special control unit to be used in ...

The effectiveness of word stuffing for synchronization depends upon the ability to distinguish the stuff words from the data words at the destination and, thus, delete correctly the stuff words. If all input sequences are permitted, the data words must ...

In data transmission systems with transversal filter equalization, the adjustment of the demodulating carrier phase, the receiver sampling time, and the equalizer tap gains are critical to the system's performance. These parameters cannot be set ...

The Graf/Pen is a digitizing or data gathering device in which the operator simply holds a pen to point or to create graphical input for digital systems. Previous attempts to provide a natural graphical input have suffered from one or more ...

This paper contains information on the general characteristics of the Control Data Corporation, MDM Communications Division M1000 Communications Message Switching System.

It is the intent of this paper to discuss the analytic systems approach to the ...