The subject matter of the present invention concerns a process for the isolation of the alkaloid galanthamine; the galanthamine itself which has been produced according to this process; the use of the galanthamine thus produced in galenic preparations; and the galanthamine thus produced for treating narrow-angle glaucoma, Alzheimer’s disease, as well as alcohol and nicotine dependence. For example, as described herein, an operator assigns a group identity to a plurality of wireless devices that attach to a mobile network. The performance model is learned during the fitting process.