A system for customized prediction of a menstruation period or a fertility period is provided. In further aspects the invention concerns methods for using the high frequency optical processor. The supervision method obtains an item of information relating to setting up the call between the first and third terminals and sends a command to resume the call between the first and second terminals as a function of whether at least one non-set up criterion is true. Third, the string message is automatically converted into a call on the specified object. Lastly, the tetrahedron modulator outputs a constant envelope waveform, which may be subjected to non-linear devices and channels without fear of negative effects due to amplitude distortion. Accordingly, any residual offset voltage, for example that due to changes in voltage across parasitic capacitances on the output of the input stage, can be eliminated.