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Patent

Data processor for a loop data communications system

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TLDR
In this paper, a plurality of data processors are connected in series in a loop configuration, each having a data terminal associated therewith, for establishing a connection between data processors in a time division multiplexed channel.
Abstract: 
A data processor for a time division multiplexed communications system. A plurality of such data processors are connected in series in a loop configuration, each having a data terminal associated therewith, for establishing a connection between data processors in a time division multiplexed channel. Each data processor demodulates the signal on the loop, extracts timing information from the loop signal and locates the channel to be used for establishing the connection between itself and another data processor. Each data processor in addition, regenerates and passes on data not intended for that data processor. Data found in the correct or selected channel is provided to the data terminal which may be a synchronous or an asynchronous device. Data from the terminal is inserted into the selected channel, modulated in accordance with a particular rule and transmitted onto the loop to another data processor operating in the selected channel.

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References
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Patent

Expandable computer processor and communication system

A Collins
TL;DR: In this article, the authors describe a communication and computation system where the processors communicate with each other and with other devices via a loop of continuously circulating data, which is comprised of channels which are time multiplexed on a bit basis in a repeating sequence.
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Central address distributor

Abramson C, +1 more
TL;DR: In this paper, a central address distributor is provided which distributes available identifying address codes on the transmission medium in a manner which makes such address codes available to communicating stations for the duration of a link.
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Loop switching teleprocessing method and system using switching interface

TL;DR: In this article, a method and system for handling digital information in the form of addressed messages is described, which includes a master communication loop such as a transmission cable and a plurality of sub-loops as well as devices are connected to the master loop through suitable interface units and sub-loop control units.
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Use equalization on closed loop message block transmission systems

TL;DR: In this article, a closed loop transmission system is described in which a plurality of stations have access to the loop to write messages into and read messages from standard-sized message blocks transmitted around the loop.
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Multiplex communication system

Blahut D E, +1 more
TL;DR: In this paper, a time division multiplex (TDM) communication system is described, which includes a master timing station and a plurality of station sets serially interconnected forming a closed unidirectional transmission loop.