Circuit arrangement for exchanging information between decentrally disposed control devices and/or individual devices in telecommunications switching systems, in particular telephone switching systems

摘要

The interfaces provided for the interconnection of decentrally disposed control devices and/or individual devices contain logic arrangements which are connected upstream of a transmission line. With the logic arrangements, pause pulses whose polarity differs from the idle condition are inserted into the data stream with the aid of a centrally generated clock signal when consecutive bits occur whose polarity corresponds to the idle condition. These thus-defined potential changes on the respective transmission line are identified by the activity identifier assigned in each case to an interface. The outputs of all activity identifiers are connected to the inputs of a collision identifier which signals an identified collision to all interfaces via a common collision signalling line. Reception identifiers which generate a reception signal when a data transmission is effected on the reception line are furthermore provided in the interfaces. Network controllers are provided in the interfaces so that the entire circuit arrangement can be operated using a standardised data transmission method.