Abstract: The screw tensioning device comprises a support tube (12), a cylinder member (15) and a piston section (17). The piston section serves for moving a tensioning bolt (20) screwed onto the thread of a threaded bolt (31). Provided according to the invention is a depth measuring device (35), which presents an externally visible indication of the screw-in depth (ET) of the threaded bolt (31). This ensures that, when the threaded bolt (31) undergoes extension under strain, there is a threaded engagement with the tensioning bolt (20) along a sufficiently long distance. This avoids the hazard that the screw tensioning device might break off from the threaded bolt.

Abstract: Proceeding from a communication terminal equipment (EGD) whereat performance feature names (LMB) 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. To that end, a respective performance feature name (LMB) is only communicated to the communication terminal equipment (EGD) for display thereat when the appertaining performance feature is noted as available in an authorization table (GWBP) allocated to the user.