Polycom 1500 Getting Started Manual page 167

RealPresence Collaboration Server (RMX) 1500/1800/2000/4000 Getting Started Guide
 If the endpoint of the designated lecturer is muted when the lecturer connects to the conference,
the lecturer remains muted until the endpoint has been unmuted.
 When you disconnect a lecturer from the conference or the lecturer leaves the conference, all
participants remain muted but are able to view participants in regular video layout until you disable
the Mute Participants Except Lecturer option. When you replace a lecturer, the MCU automatically
mutes the previous lecturer and unmutes the new lecturer.
● When The Mute Participants Except Lecturer option is disabled during the ongoing conference, all
the participants in the conference are unmuted.
● A participant can override the Mute Participants Except Lecturer option by activating the Mute All
Except Me option using the appropriate DTMF code, provided the participant has authorization for
this operation in the IVR Services properties. The lecturer audio is muted and the participant audio is
unmuted. You can reactivate the Mute Participants Except Lecturer option after a participant has
previously activated the Mute All Except Me option. The participant is muted and the lecturer, if
designated, is unmuted.
● In cascaded conferences, all participants (including the link participants) except the lecturer are
muted. Only the lecturer is not muted.
To enable or disable the Mute Participants Except the Lecturer option:
The Mute Participants Except Lecturer option is enabled or disabled in the Conference Properties - Audio
Settings dialog box:
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