The advance of communication technology has changed medical practice. The concept of medical telemedicine centers receiving, assessing and managing calls from patients or their carers on a 24 hour, 7 days a week basis is spreading in the US as well as in European countries. Usually specially trained nurses using dedicated decision support software provide the service. One aspect is the so-called triage, i.e. the decision on urgency and optimal treatment path of a stated medical problem, which has the potential to contain overall treatment costs.