The evacuation request is sent to the Control Modules of all BA wearers.
When the Control Modules receive the evacuation request, an acoustic
alarm is triggered. The status on the ECB then changes from “sent” to
“received”.
When the BA wearers have noticed the evacuation request, it has to be
confirmed. The risk area must be left to get back to the ECP.
When a BA wearer has confirmed the evacuation request, that status on
the ECB changes from "received" to "confirmed".
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