Conference systems are often installed in plenary halls or meeting rooms, whereby such conference systems typically consist of a central equipment and equipment for the participants of the discussion. The central equipment is usually used to control the conference system and supply power to the participant equipment. A conference system 1 comprising a plurality of delegate units 2,10, whereby the delegate units 2, 10 comprise a microphone 22 for receiving a speech signal from a speaker, a control device 4 for providing the delegate units 2,10 with power, a network connection 6 for connecting the plurality of delegate units 2,10 with the control device 4, whereby the network connection 6 is operable to transmit the power from the control device 4 to the delegate units 2,10, whereby at least one of the delegate units 2,10 is a control delegate unit 10, whereby the control delegate unit 10 comprises a wake-up interface 11, whereby the conference system 1 is operable to activate the control device 4 and/or the other delegate units 2 from an un-activated state into an activated state as a reaction to the use of the wake-up interface 11.