What is Enterprise-Class Emergency Notification? Business continuity, disaster recovery, and crisis management professionals understand the many reasons for an effective emergency and incident notification solution. There are many names for an Emergency Notification System (ENS) such as - Crisis Communication System, Incident Notification, Alert Notification, and sometimes Mass Notification. And there are many different vendors to choose from, but not all stand up to the rigorous requirement of large organizations. Regardless of what it's called, what makes an ENS solution enterprise-class - versus simple mass outbound messaging? Enterprise-class solutions are comprehensive, flexible, resilient, private, secure and provided by service-oriented vendors.