Method of controlling a real-time conference session, the method comprising: - connecting a first communication terminal of a first user and a second communication terminal (5A, 5B, 5C) of a second user to a media processing unit for transmitting of audio and/or video data between the first user and the second user, wherein the conference session comprises: - a passive mode of the first user, wherein the data is received and transmitted by the first communication terminal as passive data but not received by the second terminal (5A, 5B, 5C), and - an active mode (33, 35) of the first user, wherein the data is received and transmitted by the first communication terminal and received by the second terminal (5A, 5B, 5C) as active data of the first user, the method being characterized in that: - during a first duration of the first user being in the passive mode, recording (S22, S43) of the passive data of the first user, wherein the first duration starts prior to a switching point-in-time and ends at the switching-point-in-time, - at the switching point-in-time (13A, 32), switching from the passive mode of the first user to the active mode (33, 35) of the first user, wherein at the switching point-in-time the passive data of the first user recorded during the first duration is left to be transmitted to the second user, - after the switching and starting at the switching point-in-time, recording of the active data of the first user during a second duration, - after the switching and simultaneously with starting the recording (S22, S43) of the active data of the first user at the switching point-in-time, starting hastened replaying to the second user, at a speed faster than the recording speed, of the recorded first duration of the passive data of the first user followed by the recorded second duration of the active data of the first user, and, when a synchronization delay, between a first end of the second duration of the active data of the first user during recording (S22, S43) and a second end of the replayed second duration of the active data of the first user after recording, is equal or smaller than a predetermined duration, switching-off (17, S29, 34) of the recording (S22, S43) and the hastened replaying and starting to transmit active data of the first user in real-time to the second user. - connecting a first communication terminal of a first user and a second communication terminal (5A, 5B, 5C) of a second user to a media processing unit for transmitting of audio and/or video data between the first user and the second user, wherein the conference session comprises: - a passive mode of the first user, wherein the data is received and transmitted by the first communication terminal as passive data but not received by the second terminal (5A, 5B, 5C), and - an active mode (33, 35) of the first user, wherein the data is received and transmitted by the first communication terminal and received by the second terminal (5A, 5B, 5C) as active data of the first user, the method being characterized in that: - during a first duration of the first user being in the passive mode, recording (S22, S43) of the passive data of the first user, wherein the first duration starts prior to a switching point-in-time and ends at the switching-point-in-time, - at the switching point-in-time (13A, 32), switching from the passive mode of the first user to the active mode (33, 35) of the first user, wherein at the switching point-in-time the passive data of the first user recorded during the first duration is left to be transmitted to the second user, - after the switching and starting at the switching point-in-time, recording of the active data of the first user during a second duration, - after the switching and simultaneously with starting the recording (S22, S43) of the active data of the first user at the switching point-in-time, starting hastened replaying to the second user, at a speed faster than the recording speed, of the recorded first duration of the passive data of the first user followed by the recorded second duration of the active data of the first user, and, - a passive mode of the first user, wherein the data is received and transmitted by the first communication terminal as passive data but not received by the second terminal (5A, 5B, 5C), and - an active mode (33, 35) of the first user, wherein the data is received and transmitted by the first communication terminal and received by the second terminal (5A, 5B, 5C) as active data of the first user, - during a first duration of the first user being in the passive mode, recording (S22, S43) of the passive data of the first user, wherein the first duration starts prior to a switching point-in-time and ends at the switching-point-in-time, - at the switching point-in-time (13A, 32), switching from the passive mode of the first user to the active mode (33, 35) of the first user, wherein at the switching point-in-time the passive data of the first user recorded during the first duration is left to be transmitted to the second user, - after the switching and starting at the switching point-in-time, recording of the active data of the first user during a second duration, - after the switching and simultaneously with starting the recording (S22, S43) of the active data of the first user at the switching point-in-time, starting hastened replaying to the second user, at a speed faster than the recording speed, of the recorded first duration of the passive data of the first user followed by the recorded second duration of the active data of the first user, and,