The method for establishing a coordination link (40) between a first and second control center (10, 12) for carrying out services, including a stage in which one of the centers (10) transmits its address to the other center (12) by inserting the address in a call control signal transmitted to the other center (12), and a stage in which the center (12) which has received the address inserted into a call control signal establishes the coordination link (40) in order to transport the call control signal used in order to transmit the address of one of the centers to the other center.