A gateway system of a remote-reading apparatus comprising a plurality of metering devices each comprising a metering module and a short-range radiofrequency module; the gateway system comprising: - a short-range radiofrequency emitter/receiver device; each radiofrequency module of each metering device being adapted to communicate with this radiofrequency emitter/receiver device, and - a hub device communicating, on the one hand, with said radiofrequency emitter/receiver device and, on the other hand, with at least one external telecommunications network (1, SAT); the radiofrequency emitter/receiver device comprising: - reception means for receiving from the hub device a gateway downlink signal, built from a network synchronisation signal (S sync) originating from a clock of the telecommunications network, and - processing means (21, 22, 23) for adapting the radiofrequency emissions to the metering device and/or the radiofrequency receptions coming from the metering device, from this received gateway downlink signal, so that these radiofrequency emissions and/or receptions are phase- and/or frequency-synchronised according to the network synchronisation signal (S sync); the radiofrequency emissions being adapted to emit to the metering device, following the reception of metering data originating from the metering device, a radiofrequency downlink signal to phase- and/or frequency-synchronise the radiofrequency emissions and/or receptions of the radiofrequency module of the metering device according to the network synchronisation signal (S sync); and the hub device comprising: - reception means for receiving from said telecommunications network (1, SAT) a network synchronisation signal (S sync) originating from a clock of this network, - processing means (5, 6, 7, 8, 9) for building the gateway downlink signal from the network synchronisation signal, and - transmission means for transmitting the gateway downlink signal to the radiofrequency emitter/receiver device, the processing means (5, 6, 7, 8, 9) being adapted to build the gateway downlink signal so that the radiofrequency emissions and/or receptions of the radiofrequency emitter/receiver device are adapted from this gateway downlink signal and phase- and/or frequency-synchronised according to the network synchronisation signal. - a short-range radiofrequency emitter/receiver device; each radiofrequency module of each metering device being adapted to communicate with this radiofrequency emitter/receiver device, and - a hub device communicating, on the one hand, with said radiofrequency emitter/receiver device and, on the other hand, with at least one external telecommunications network (1, SAT); - reception means for receiving from the hub device a gateway downlink signal, built from a network synchronisation signal (S sync) originating from a clock of the telecommunications network, and - processing means (21, 22, 23) for adapting the radiofrequency emissions to the metering device and/or the radiofrequency receptions coming from the metering device, from this received gateway downlink signal, so that these radiofrequency emissions and/or receptions are phase- and/or frequency-synchronised according to the network synchronisation signal (S sync); - reception means for receiving from said telecommunications network (1, SAT) a network synchronisation signal (S sync) originating from a clock of this network, - processing means (5, 6, 7, 8, 9) for building the gateway downlink signal from the network synchronisation signal, and - transmission means for transmitting the gateway downlink signal to the radiofrequency emitter/receiver device,