The missions of the emergency medical communication centers (EMCC) are to provide a response to calls related to emergencies (emergency medical dispatch) or to on-call medicine. The medical dispatch process is complex. The dispatch process tends to become fragmented and specialized for the different dispatch tasks, medical and non-medical, involving the collaboration of several health and non-health professionals in the same centre. A real chain of competences inside the EMCC has thus been created, within the pre-hospital emergency chain itself. Cross-disciplinary training based on simulated situations can be used to strengthen inter-professional collaboration within the EMCC.