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.