The present disclosure generally relates to methods of forming barrier assemblies. Accordingly, the length for the trust converting quantity can be shortened in proportion to the ratio of the stroke. A first transmission path is used to interchange basic control data and the user data on the basis of a first transmission standard between the primary control unit and the communications installation, and a second transmission path based on a second transmission standard is used to interchange extended control data between an auxiliary control unit and the communications installation. A radio receiver receives processed video signals from the base station or another camera device.