Abstract: A Hybrid Fiber-Coax [HFC] telecommunication system including several modulation devices (MC1-MCn) and a combiner device (CSN) coupled thereto. The modulation devices provide modulated telecommunication signals under the form of output currents that are applied to the combiner device that is further connected to a coaxial cable (COAX) for transmitting thereon these modulated signals in predetermined frequency channels according to the Frequency Division Multiple Access [FDMA] structure. The invention comprises in operating the combiner device as a current-mode summing node instead as of a voltage-mode summing node. As a result, the implementation is relatively easy, because a current summing node may be just a single junction point, and its linearity is thus obviously high.