Polycom ViewStation EX Api Manual page 12

API Guide for ViewStation EX, ViewStation FX, and VS4000
4
listen
pip
screen
New "off" parameter adds the ability to
unregister the listen <phone|video|sleep>
command.
New "swap" parameter adds ability to toggle
the content of PIP and main display between
near-site and far-site view.
New "phone" parameter takes you to the
Telephone screen where you can dial or
disconnect a telephone call.
The screen enableui and screen disableui
commands are now retained after a system
restart.
www.polycom.com/videodocumentation