The present invention relates to a method for establishing telecommunication between at least a first and a second users within a telecommunication network comprising the following steps: receiving a request from said first user to set up a telecommunication with said second user, monitoring telecommunication activity in accordance with said request to detect a telecommunication activity of said second user with a third user different from said first user, and, in case of detection of said telecommunication activity of said second user, setting up a telecommunication between said first and second users after the end of said telecommunication activity of said second user with a third user different from said first user. The invention also relates to devices for performing the method.