To provide a method for reducing a time required to initialize and set up communication between a read/write terminal for electromagnetic transponders and the one transponder entering a field of the terminal or more, that is, to provide a method for decreasing consecutive times required for the read/write terminal, in order to decide and identify all the transponders present in the terminal field at a specific time.

This invention provides the method for establishing communication between devices that include the terminal, which is adapted so as to cooperate with the transponder, when at least the one transponder enters the terminal field and uses an oscillation circuit to generate a high-frequency electromagnetic field, a circuit that adjusts a signal phase of the oscillation circuit with respect to a reference value, and a circuit that evaluates a minimum number of the transponders present in the field, on the basis of the measurement of a current of the oscillation circuit.