Switzerland. Geneva. Two police cars with flashing lights travel at full speed towards Versoix on the Rue de Lausanne in the middle of the night. The policemen are answering a request on 117 which is the emergency telephone number. The public telephone network has a single emergency telephone number (sometimes known as the universal emergency telephone number or occasionally the emergency services number) that allows a caller to contact local emergency services for assistance. 19.03.12 © 2012 Didier Ruef