(WASHINGTON) -- On Wednesday the Department of Homeland Security and the Federal Communications Commission will hold the first nationwide test of the Emergency Alert System.
The test will occur at 2 p.m. ET and will be carried on all broadcast television, radio stations and cable and satellite television systems in the U.S. and U.S. territories.
The national public warning system has been used by state and local authorities for tests and notifications such as Amber Alerts and weather warnings but there has never been a nationwide test.
The Emergency Alert System was designed in the 1950s and is run by the Federal Emergency Management Administration and the FCC. President Bush signed an executive order in 2006 to mandate the nationwide system and national alert capability.
Because the national system has never been tested, homeland security officials say this is an important trial to see how it works. It is expected to last 30 seconds.
FEMA and the FCC want to ensure that the deaf and those hard of hearing, people with cognitive or mental health concerns, senior citizens, and people not proficient in English are aware of it.
Officials say the system could be used to ensure that the president and officials can address the nation during a significant emergency such as a natural disaster, terrorist attack or cyber-incident.
DHS and FEMA are currently working on expanding the Emergency Alert System by developing the Integrated Public Alert and Warning System, which will allow nationwide alerts to be sent to wireless mobile devices and phones.
Working with the FCC, the two agencies are also working on the Commercial Mobile Alert System and the Personalized Local Alert Network, which would allow local alerts to be sent via wireless technology and devices.
Copyright 2011 ABC News Radio