Patent ID: 7551936

Claim:
A method of radiotransmission of a message consisting of a preamble and a data telegram to a plurality of receivers in a danger alarm system having a plurality of participants each having a transmitter and a receiver, wherein each receiver has a predefined address, comprising the steps of: cyclically switching-on the receivers at preassigned time intervals, sending the preamble including a plurality of addresses for said plurality of receivers by a transmission-ready participant for at least the duration of an interval, wherein only receivers to which one of said plurality of address is assigned in the event of receiving the preamble, remaining switched-on until the preamble is completed, and in the event that no address is received, being switched-off, wherein the start time of the data telegram is transmitted in the preamble, the plurality of receivers, after receiving the start time, are switched-off, and switched-on again at that start time, and the transmission-ready participant sends out a telegram over his transmitter at the start time which is received by the plurality of receivers.