System for setting up data transmission circuits between a plurality of stations
First Claim
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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Abstract
A system for setting up circuits for the transmission of data with a constant data flow rate between a plurality of use equipment stations. A plurality of switching units are series-connected to form a loop by way of duplex point-to-point transmission connections. Each switching unit is connected to a corresponding use equipment station by way of at least a duplex transmission connection. A remote control receiving unit is incorporated in each switching unit for controlling the switching of data signals received by way of one of the transmission connections in response to predetermined control signals received. This switching function can be used to set up data circuits between any pair of use equipment stations.
12 Citations
5 Claims
- 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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4. 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 further comprises clocking means for producing clock pulses, said clocking means being connected to said remote control receiving means such that the data transmission speed of each of said switching units is determined by the frequency of the clock pulses generated by the corresponding clocking means, said frequency being selected from a group of predetermined values.
Specification