Proceeding from a communication terminal equipment whereat performance feature names can be displayed menu-controlled in order to provide the user with an offering of the available performance features for a potential selection or, respectively, activation of one of these, a check of the authorization of the user for the individual performance features is provided. The rotor core includes a plurality of bar apertures, a plurality of elongated flux barriers separate from the bar apertures and positioned radially inward of the bar apertures, and a plurality of magnet slots separate from the bar slots and positioned radially inward of a portion of the bar apertures. Other embodiments are described and claimed. An MD5 hash authenticates the data for court use.