Profile: There is a need in emergency warning plans and systems for an indoor alerting system that does not depend on commercial radio or television, telephone lines, or even electrical service for effective operation.Warning Systems Inc. (WSI) has developed a system to meet this need.The field-proven ONALERT® message system provides a secure, reliable and effective infrastructure for transmitting warning alerts and messages - targeting specific receivers or predefined groups and geographic zones, as well as all-call broadcasts.