Development, supply, installation, and commissioning of two Computerized Interlocking Control Systems (CIPoM) for the renewal and modernization of signalling posts in Bourg-la-Reine and creation of a new local control post in Arcueil-Cachan, including functionalities for train traffic management, maintenance information display, alarm management, traction display, data archiving, and system integration, with a framework agreement for a duration of 24 months encompassing system supply, maintenance, documentation, and personnel training.