Interconnecting buidlings with data and communication lines exposes all sites to a single surge event. It is crucial to reinforce the level of reliability for these systems. The user can achieve this by using a cascaded surge protection strategy for these sensitive networks. CITEL Surge protector for LAN can be adapted to the different configurations. They are equipped with the network connection (RJ45) and available either in an individual box for the protection of an isolated terminal, or in a 19’’ Rack version for multi-line protection at hub or server level.