Polycom realpresence 1800 Administrator's Manual page 171

Content sharing Options
Field
Content Resolution
Send Content to
Legacy Endpoints
H.264 High Profile
(RMX 1800 /
MPMRx only)
Polycom®, Inc.
Description
Select a Content Resolution from the pull-down menu.
The Content Resolutions available for selection are dependent on the content
sharing mode (Highest Common or Multiple Content Resolutions), Line Rate and
Content Settings selected for the conference.
For a full list of Content Resolutions see
(non-TIP) Conferences.
Note: This field is displayed only when H.264 Cascade Optimized is selected.
When enabled (default), content is sent to H.323/SIP/ISDN endpoints not supporting
current MCU content control protocol (legacy endpoints) over the people video layout
(see Sending Content to Legacy
This field is displayed only when conferencing mode is VSW (Video Switching), or
the selected Content Protocol is H.264 Cascade Optimized.
In scenarios where endpoints not supporting high profile (such as HDX) are
connected to the conference, it is recommended to clear this check-box to enable
them to share content.
Sharing Content During Conferences
H.264 Supported Resolutions for AVC
Endpoints).
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