Polycom RMX 1500 Administrator's Manual page 41

The RMX supports the VUI addition to the H.264 protocol for endpoints that transmit wide video
(16:9) in standard 4SIF resolution.
12 To select the Video Layout for the conference, click the required number of windows
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Table 1-3 Auto Layout – Default Layouts
Number of Video Participants
0–2
3
4–5
6–7
8-10
11
12+
In layout 2+8, the two central windows display the last two speakers in the conference:
the current speaker and the "previous" speaker. To minimize the changes in the layout,
when a new speaker is identified the "previous" speaker is replaced by the new speaker
while the current speaker remains in his/her window.
from the layouts bar and then select the windows array. The selected layout is
displayed in the Video Layout pane.
Table 1-4 Video Layout Options
Number of Video Windows
1
2
3
4
5+
9
Auto Layout Default Settings
Available Video Layouts
Chapter 1-Conference Profiles
1-19