The invention relates to a multi port router device capable of carrying a number P, which is greater than or equal to three, of frequency channels, from a number M of input ports to a number N of output ports, at least one of the two numbers M and N being greater than or equal to two, characterized in that it includes at least two filters (12, 14, 16, 18), each filter comprising at least two coupled resonators, at least one resonator (Rs1, Rs2) being common to two different filters, and each input port and each output port being connected directly to at least one resonator. The router device is capable of appropriately performing routing in which it is possible to supply on at least one output port an output multiplex having at least a first and a second frequency channel, among which: the first frequency channel has originated from a first input multiplex, supplied on a first input port and comprising said first frequency channel, and at least one further frequency channel forwarded to a second output port of the device; and the second frequency channel is either forwarded from a second input port, or, when the first input multiplex comprises at least three different multiplexed frequency channels, the second frequency channel originates from the first input multiplex, the first second frequency channels, being frequentially disposed on both sides of a third frequency channel, with the said third frequency channel being routed to a different output port.