Polycom realpresence 1800 Administrator's Manual page 220

 View Participant Sent Video - To display the video sent from the participant to the conference.
 View Participant Received Video - To display the video sent from the conference to the
participant.
The Video Preview window opens.
If the video card installed in the PC does not support DirectDraw Acceleration, a black window may
be viewed.
Polycom®, Inc.
Additional Conferencing Information
189