There are several components within the Integrated Public Alert and Warning System (IPAWS). The IPAWS Architecture Diagram shows how standards based alert message protocols, authenticated alert message senders, and shared access and distribution networks work together to deliver alerts and warnings to public interface devices.
To read more on the individual components within IPAWS visit the following pages:
Common Alerting Protocol (CAP): the digital format for exchanging emergency alerts that allows a consistent alert message to be disseminated simultaneously over many different communications systems.
Primary Entry Point Stations (PEP): private or commercial radio broadcast stations that cooperatively participate with FEMA to provide emergency alert and warning information to the public before, during, and after incidents and disasters.
IPAWS Open Platform for Emergency Networks (IPAWS-OPEN): the Federal alert aggregator that receives and authenticates messages transmitted by alerting authorities and routes them to existing and emerging public alerting systems.
Emergency Alert System (EAS): the message dissemination pathway that sends warnings via broadcast, cable, satellite, and wireline services.
Wireless Emergency Alert (WEA): the message dissemination pathway that broadcasts alerts and warnings via cell phones and other mobile devices.
Return to the FEMA IPAWS Home Page.