Abstract: The invention relates to a survey system SS comprising a survey system input SSI for input of call descriptive data CDD from a local switch LS, interviewing means IN providing feedback from calling parties CPF routed through said local switch LS, correlation means CM producing correlation results CR on the basis of correlating said call descriptive data CDD and said calling party feedback CPF. According to the invention, a survey system is provided which may be applied for obtaining feedback from users of a service provider via a local switch.