With these long-term requirements in mind, Cemagref opted for remote monitoring facilities and selected SOFREL S50 RTUs with remote I/O modules, which offer the ability to collect field data distributed across an area of more than one hectare. Data are transmitted over the dial-up phone network. This remote monitoring system becomes crucial in case of system failure because of the short response times required: 1 hour for the hatchery and 4 hours for the rearing basins. In particular, users appreciate the flexible setup of the Alarm Reporting feature that allows performing different processing tasks according to the failure severity (sequences, schedules, priority levels, etc).