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System for setting up data transmission circuits between a plurality of stations

  • US 4,670,873 A
  • Filed: 08/28/1985
  • Issued: 06/02/1987
  • Est. Priority Date: 10/15/1982
  • Status: Expired due to Fees
First Claim
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1. A system for setting up circuits for the transmission of data with a constant data flow rate between a plurality of use equipment stations, comprising a plurality of switching units connected to form a loop, each pair of adjacent switching units being connected by duplex point-to-point transmission connections, each of said switching units being connected to a corresponding one of said plurality of use equipment stations by way of at least a duplex transmission connection, and each of said switching units comprising a remote control receiving means for controlling the switching of data signals received by way of one of said transmission connections in response to predetermined control signals received, whereby a data circuit can be set up between a pair of use equipment stations such that data is exchanged between said pair of stations by way of the respective duplex transmission connections which connect two of said switching units to said pair of stations and by way of a part of said loop connecting said two switching units, wherein each of said switching units comprises a first encoding means operatively connected to transmit composite signals combining clock pulses and data with a predetermined timing to said corresponding use equipment station, and a second decoding means operatively connected to separate and regenerate clock pulses and data from composite signals received from said corresponding use equipment station.

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