"Common channel signalling" (5) is a signalling method in which a single channel between exchanges conveys, by means of labelled messages, signalling information relating to a multiplicity of circuits or calls and other information such as that used for network management.
"Broche basculante" (2): broche porte-outil qui modifie, au cours du processus d'usinage, la position angulaire de son axe de référence par rapport à tout autre axe.