Alarm data concentration and gathering system

摘要

A system is disclosed enabling bidirectional communications between a central station and a plurality of satellite stations over a switched data transmission network in which each satellite station initiates all communications between that satellite station and the central station such that priority data generated within a given satellite station is immediately transmitted to the central station, while routine data generated within each satellite station is stored for delayed transmission to the central station at different times previously set by the central station but monitored by local clocks within each of the satellite stations.