Advising patients seeking medical guidance while communicating with them via telephone is a highly relevant skill in clinical daily life. However, telephone consultations differ from face-to-face interactions: clinical examination is nearly impossible and visual signals cannot be observed. Thus, telephone consultations require specific skills training. This article describes the development, implementation and evaluation of a course, "Telephone Consultation for Medical Emergencies", for 5 year medical students at the University of Bern, Switzerland. Following the evidence in the literature for telephone consultations, we developed guidelines for effective communication via telephone. After self-study of preparatory material, learners engaged in telephone consultations with simulated patients (SP) at the simulation center. They received multi-dimensional feedback regarding the encounter. The course was successfully implemented in 2012. Evaluations showed the course to be well-received by students. In a survey, students agreed that they had learned many new skills and that they considered this learning as being important in their future employment. They felt that the SP feedback was helpful and that being observed by peer-students during the encounter or filling in a checklist while observing peer-students in other encounters added to their learning. During the debriefing of the simulation with a clinical expert, students judged the scenarios as realistic and relevant, praised the SP performances and identified that the most instructive aspect of the training was the opportunity to practice and to get feedback. Telephone consultations require specific skills that should be trained. The current Covid-19 pandemic and the recommendations of government institutions for patients to contact healthcare professionals primarily via telephone stress the importance of adequately training these skills. In this publication we describe a feasible and viable format for implementing this process.