the signal to identify the mood or temperament of the individual associated with presentity if the mood of the individual associated with the presentity is detected as being bad the subscriber may then decide to delay calling the individual associated with the presentity 3 such mood related data can be further processed by the presence service system 2 in a processing module 18 to determine the interest level of the individual associated with the presentity during a conversation since it has been found that such information can be determined by analysing a person 39 s speech patterns a noise level analyser can be used to determine for example the environment in which the presentity 3 is located further a background noise level analyser determines where the presentity is located for example if the presentity is located in a car outside in a meeting etc the location can be determined by analysis of the background noise if it is determined that the presentity 3 is in a meeting the subscriber may wish to delay calling the individual associated with the presentity 3 until the meeting is over depending on the analysis to be carried out a bandwidth limiter may be provided the analysis may include a simple over all loudness detection analysis to determine the loudness of background noise a single spectral analysis and correlation check of the recorded spectrum and some reference spectra may be carried out to identify the type of background noise for example a car train etc further several spectral analyses may be combined over a short period of time to identify more presence information with respect.