| Using Yealink Meeting Server | 34Blocking/Unblocking the AudioThe moderator can block/unblock the audio of any participant to control whether the participant can hearthe voice in the meeting.Procedure1. In the Conference Control page, tap Participant.2. Tap beside the desired participant, select Block Audio/Unblock Audio.Muting or Unmuting All ParticipantsIn a YMS video conference, the organizer or the moderator can mute or unmute all conference participantsexcept themselves. In the Training mode conference, the participants muted by the organizer ormoderator cannot unmute themselves.Procedure1. In the Conference Control page, tap Participant.All participants are displayed on the touch screen.2. Tap Mute All or Unmute All to mute/unmute all participants.Muting/Unmuting a ParticipantIf you are the organizer/moderator of a YMS video conference, you can mute or unmute a singleparticipant. In the Training mode conference, the muted participants cannot unmute themselves.Procedure1. In the Conference Control page, tap Participant.All participants are displayed on the touch screen.2.Tap beside the desired participant.The icon becomes to . The participant is muted and other participants cannot hear his voice.3. Tap beside the participant that you want to unmute.The icon becomes to . The participant is unmuted and other participants can hear his voice.Controlling the Participant CamerasThe moderator can control the participant cameras, including moving up and down, moving left and right,and zooming in/out.Before you beginMake sure that the camera you want to control is not turned off and the Far Control Near Camera feature isenabled.Procedure1. In the Conference Control page, tap Participant.2. Tap after the desired participant, select Camera Control.3. Tap the navigation keys to adjust the camera angle.