Abstract: Apparatus for frequency multiplexed radio links between a control transceiver and at least two operator transceivers, said apparatus being of the type in which the control transceiver comprises on the one hand a transmitter receiving a low frequency signal from a microphone and transmitting a high frequency wave Fe and on the other the same number of receivers as there are operator transceivers, each receiver being adjusted to a particular high frequency Fi which differs from Fe, each receiver supplying a low frequency signal which is directed to a loudspeaker and in which each operator transceiver comprises on the one hand a receiver adjusted to the said frequency Fe and supplying a loudspeaker and on the other a transmitter connected to a microphone and operating on one of the said frequencies Fi, wherein it also comprises means located in the control transceiver for reinjecting part of the low frequency signals supplied by each of the receivers of the control transceiver into the transmitter of said transc