User's Manual

Polycom® RealPresence Collaboration Server (RMX) 1500/2000/4000 Administrator’s Guide
2-44 Polycom, Inc.
Audio Clarity When selected, improves received audio from participants connected
via low audio bandwidth connections, by stretching the fidelity of the
narrowband telephone connection to improve call clarity.
• The enhancement is applied to the following low bandwidth (8kHz)
audio algorithms:
• G.729a
• G.7 11
• Audio Clarity is supported with MPM+ and MPMx cards only.
• Audio Clarity is selected by default.
• Audio Clarity cannot be selected and deselected during an
ongoing conference.
Note: From Version 8.1, the MPM+ media card is not supported.
Speaker Change
Threshold
Select the amount of time a participant must speak continuously
before becoming the speaker. The possible values are:
• Auto (Default, 3 seconds)
• 1.5 seconds
• 3 seconds
• 5 seconds
Note: This option can only be changed in MPMx Card Configuration
Mode. in MPM+ Card Configuration Mode this value is always Auto.
Mute participant
except lecturer
When the Mute Participants Except Lecturer option is enabled, the
audio of all participants in the conference except for the lecturer can
be automatically muted upon connection to the conference. This
prevents other conference participants from accidentally interrupting
the lecture, or from a noisy participant affecting the audio quality of the
entire conference. Muted participants cannot unmute themselves
unless they are unmuted from the Collaboration Server Web Client/
RMX Manager.
You can enable or disable this option during the ongoing conference.
Notes:
• When enabled, the mute indicator on the participant endpoints are
not visible because the mute participants was initiated by the
MCU. Therefore, it is recommended to inform the participants that
their audio is muted by using the Closed Caption or Message
Overlay functions.
In the Collaboration Server Web Client/RMX Manager the mute by
MCU indicator is listed for each muted participant in the Audio
column in the Participants pane.
• The Mute Participants Except Lecturer option can be disabled
during an ongoing conference, thereby unmuting all the
participants in the conference.
• 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 replace a lecturer, the MCU automatically mutes the
previous lecturer and unmutes the new lecturer.
Table 2-19 New AVC CP Profile - Audio Settings Parameters (Continued)
Field/Option Description