Polycom V500 Release Note page 17

Release Notes
V500 and VSX systems, version 8.5
Feature Limitation
Cameras There is no way for a user to get camera control for a camera
(VSX systems) that is set to the content channel.
The Camera Calibration screen will always be displayed for
the VSX 7000e and VSX 8000, even though automatic
camera tracking only works with a PowerCam Plus camera.
To avoid a "keystone effect" in which the video image
appears tilted, make sure that the VSX 5000 camera is
pointed perpendicular to the subject.
Chair Control VSX 3000 systems may lose chair control ability, especially
in multipoint calls with all ISDN endpoints.
Selecting Acquire Chair on a VSX 7000 MCU may disable
Discussion mode view.
Closed Captions Closed captions cannot be sent through a gateway.
Conference on Conference on Demand calls to ISDN endpoints may fail
Demand when dialed from an H.323-only system. To work around this
issue, provide the full international number, including country
code, for ISDN endpoints.
Configuration Do not change the VSX system monitor setting while sending
content.
VSX 5000 factory camera presets do not work.
Contact List If you enable the contact list home screen and want to install
a system software version earlier than 8.5, disable the
contact list before doing so. Either disable it in the user
interface before you run Softupdate, or disable the option to
save system settings when you run Softupdate.
Directory System names with Chinese hieroglyphs cannot be edited in
the directory using the system's embedded interface.
New directory entries created in a new local category may
not be visible when you try to view them the first time, until
you move around in the screen.
Pressing Select on the remote control twice when selecting a
directory entry may lead to connection errors.
Far End Camera Far End Camera Control does not work reliably with
Control non-VSX system endpoints.
Gateway Calls In calls through a gateway, selecting a far-site camera source
that is not being used shows frozen video from the previous
camera source, instead of a blue screen.
Global Directory When dialing calls from the global directory, VSX systems set
the call speed based on the local call quality setting, rather
than the directory's setting.
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