Abstract: The invention relates among other things to a method for operating a secondary computer (22), in which a memory unit in an originating computer (12) initially stores a first data volume (112) and a second data volume (114). During transmission of copies of the data volumes (112, 114), change reports (150, 154) are processed in the originating computer (12) and in a secondary computer (22) irrespective of whether the associated data volume has already been transmitted.

Abstract: A circuit is provided for synchronizing a transmitting/receiving station to the data network of a digital communications system having a correlation receiver in the relevant receiving device which supplies a correlation signal serving for synchronization purposes. The function of the correlation receiver is to implement the bit synchronization and block synchronization for the most favorable radio range from an asynchronous state, in the synchronous state to supply the adjustment criteria for the current radio range and, in the event of rebooking, to supply those of all the other possible radio ranges (indirect access to the adjusting elements via a computer). For this purpose, in the receiving device, the incoming non-generated items of received data are fed, on the one hand, to the correlation receiver and, on the other hand, to a regenerating device which can be set up by the signals of the correlation receiver.