The information that passes through the networks must be flawless. By guaranteeing our interventions 24/7, our maintenance department makes BVS a major player in the preventive and curative maintenance of communication networks and safety – security systems. In order to respond accurately and without delay, our Hotline tool centralises and schedules all requests with immediate support and then forwards our digital intervention reports in real time. Thanks to our experience, we have developed real expertise in common and rarer problems and incidents. Our advisory role can be essential for the sustainability and effectiveness of systems. To this end, we carry out audits of existing installations.