Abstract: To solve problems of congestion of processing caused by the simultaneous occurrence of a very large number of alarms, the alarms are processed off-line or at least as not particularly urgent tasks. In practice, assessing the severity of an alarm is not treated in itself as an urgent event, even if the assessed severity indicates that the alarm is associated with a very serious event. It is shown that by operating in this way it is possible to retain control over a system for managing a transmission network and to avoid being unable to react if the network is subject to a major disruption, in particular if a very high rate link fails.