Some embodiments provide a computer network, a computing device coupled to the computer network, and a telephone coupled to the computer network and to a telephone line. Influencing and control quantities are determined at a real paper winding device and are stored dependent on time. The arrhythmia episode is classified as a monomorphic tachyarrhythmia or polymorphic tachyarrhythmia based on the one or more templates. A computer system is configured to calculate the total cost of the scanned shopping items using the determined identity of the shopping items. The cage may be produced by forming a closed base body, cutting out a plurality of cutouts, fully hardening the cage by heating and subsequently quenching the cage, and tempering the cage.