METHODE DE SECURISATION D'UN RESEAU DE TELECOMMUNICATION OPTIQUE EN ANNEAU AINSI QUE NOEUD DE COMMUNICATION, NOEUD DE COMMUNICATION A AMPLIFICATION ET CONCENTRATEUR DE TRAFIC D'UN RESEAU SECURISE DE TELECOMMUNICATION OPTIQUE EN ANNEAU

摘要

The secure optical telecommunications traffic method has a traffic concentrator (1) and a communications node (N3) connected by an optical fibre (2). The concentrator transmits optical signals. The concentrator uses the same fibre in one direction whilst the network is in a state of normal transmission and in the opposite direction whilst in the emergency state.