Method of communicating between at least two devices, comprising in particular the following steps: • a step of hooking up a first device and at least one second device, • the first device being connected to a first communication network, • the said at least one second device being connected to a second communication network, • the said first device or the said first communication network or the said second communication network being adapted for the production or the transfer of a multimedia stream comprising N channels, • the said at least one second device comprising means for processing a multimedia stream comprising P channels, with N less than P, and • a step of transferring a first multimedia stream from the first device to said at least one second device, characterized in that it also comprises the following steps: • a step of determining, on the basis of information received during the step of hooking up, whether or not a trunking of a second multimedia stream, comprising up to P - N complementary multimedia data, is possible, and • if it is determined that the trunking is possible, a step of trunking the second multimedia stream to the said at least one second device, the said step of trunking being carried out in parallel with the step of transferring the first multimedia stream, the said second multimedia stream originating from a multimedia resources server for the transmission of multimedia data. • a step of hooking up a first device and at least one second device, • the first device being connected to a first communication network, • the said at least one second device being connected to a second communication network, • the said first device or the said first communication network or the said second communication network being adapted for the production or the transfer of a multimedia stream comprising N channels, • the said at least one second device comprising means for processing a multimedia stream comprising P channels, with N less than P, and • a step of transferring a first multimedia stream from the first device to said at least one second device, characterized in that it also comprises the following steps: • a step of determining, on the basis of information received during the step of hooking up, whether or not a trunking of a second multimedia stream, comprising up to P - N complementary multimedia data, is possible, and • if it is determined that the trunking is possible, a step of trunking the second multimedia stream to the said at least one second device, the said step of trunking being carried out in parallel with the step of transferring the first multimedia stream, the said second multimedia stream originating from a multimedia resources server for the transmission of multimedia data. • a step of determining, on the basis of information received during the step of hooking up, whether or not a trunking of a second multimedia stream, comprising up to P - N complementary multimedia data, is possible, and • if it is determined that the trunking is possible, a step of trunking the second multimedia stream to the said at least one second device, the said step of trunking being carried out in parallel with the step of transferring the first multimedia stream, the said second multimedia stream originating from a multimedia resources server for the transmission of multimedia data.