The PPI warning signals

Warning signal to the population in case of major risk

The PPI warning signals

Alert in case of major risk

Specific Responsive Plan (PPI) valid in France only

Specific Responsive Plan (PPI) is an emergency rescue procedure in case of a major risk for the protection of the public and the environment. The triggering of this plan begin with a national warning signal and ending with the end warning signal. Monthly signal test is done every 1st Wednesday of the month.

National warning signal

A rising and falling sound 3 times 1 minute 41s separated by a short silence


End warning signal

30 seconds continuous sound (On the Prefectoral order)


Monthly signal test

A rising and falling sound 1 time 1 minute 41s (1st cycle of the NATIONAL WARNING SIGNAL only)


Test the PPI warning signals

Contact an expert of PPI warning signals

+33 (0)1 40 20 07 39

ORSON France

Global Solutions Consulting, engineering, commissioning and maintenance

Engineering, study, consulting and installation of acoustic solutions
PPI/POI Emergency Population Warning Sirens, sound and air cleaning systems.

+33 (0)1 40 20 07 39