Abstract: The invention relates to a subscriber (1) for using in a communication system, and to a communication system (5) which, at least in a partial section, has redundant communication for increasing the fault tolerance, the communication system being simultaneously highly dynamic. Said communication system comprises, at least in one section, at least two communication paths (10, 20) which are preferably arranged according to a double ring topology. The inventive subscriber comprises one processing unit (11, 21) per communication path, for processing the information signals obtained by means of the respective communication path and/or for producing and sending information signals via the respective communication path.