Maintenance Manual

Video
to use
by
default
Allows you to replace a participant's
video with that of another participant.
<self> tells the MCU to display the
participant's own video during
conferences.
If you select another preconfigured
endpoint from the dropdown, the
MCU will display the video stream
from the selected endpoint in place of
the participant's own video.
This feature can be useful in scenarios like translation, where you
want to see the original speaker while you hear the translator.
You do not need to alter any settings on the viewed participant,
so in a translation scenario you would only change this setting on
the translators' endpoints.
This link is active whenever both participants are in the
conference. The selected participant's video is always shown in
place of the original participant's video; the original participant's
video does not show in the conference, unless you explicitly
show it using the pane placement feature.
Related Topics
■ Customizing a participant's layout display
■ Managing participant's audio signals
■ Selecting a custom participant layout
■ Displaying statistics for a participant
■ Sending messages to individual participants
■ Using an auto attendant
Viewing and Adjusting a Participant's Audio Levels
1. Go to Conferences.
2. Click a Conference name and then click on a participant's name.
3. Click the Audio tab.
Waveforms and Statistics
■ The Participant audio and Conference audio waveforms give a visual indicator of the current audio levels
from the participant and from the conference. If the participant is the active speaker at the time when you
click the audio tab, the waveforms should be similar. If a waveform is flat, it means the source is silent or
muted.
■ AGC (Adaptive Gain Control): indicates the status of AGC for this endpoint. AGC can be set by the
conference, or by the participant's configuration, or manually on this page. The manual setting for an active
participant - on this page - always takes precedence over conference or participant configuration.
■ Current voice gain applied: indicates how much amplification is applied to the voice signal at the time you
access the page; the gain could have been applied manually or by AGC.
■ Audio energy (post gain stage): is the average of the whole audio signal, including manual or AGC gain, from
this participant over time, compared with the maximum that the MCU can tolerate. The number is always
negative as it represented by a fraction of the maximum using a logarithmic scale. A mostly quiet signal will
have larger negative numbers, while a very loud participant will be closer to 0.
■ Average voice level (pre gain stage): is an average of the audio signal's high points over time, measured
against the maximum that the MCU can tolerate. The average voice level is useful when compared to the
average background level; a large difference between the two means the voice is easily discernible from the
background noise. If it is too close to the average background level, the audio may be improved by applying
AGC or manual gain.
■ Average background level (pre gain stage): is an average of the signal's low points over time, measured
against the maximum that the MCU can accept. It is always negative and a larger negative number means a
lower background noise. If the average background level is too high, the conference may experience
undesirable effects such as switching to this participant when the participant is not the active speaker.
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