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User’s Guide for Polycom HDX Desktop Systems
8 Polycom, Inc.
Participating in an Encrypted Call
If encryption is enabled on the system, a locked padlock icon appears on the
monitor when a call is encrypted. If a call is unencrypted, an unlocked padlock
appears on the monitor.
• If you are in a point-to-point call or a multipoint call hosted by another
system, the padlock icon displays the state of your individual connection.
• If you are hosting a multipoint call, the padlock icon displays the
combined state of all connections: encrypted if all connections in the call
are encrypted, unencrypted if one or more connections in the call are not
encrypted.
In one call, some connections might be encrypted while others are not. The
padlock icon might not accurately indicate whether the call is encrypted if the
call is cascaded or includes an audio-only endpoint. To avoid security risks,
Polycom recommends that all participants communicate the state of their
padlock icons verbally at the beginning of a call.
Using Your Polycom HDX 4000 Series as a Computer
Monitor
You can save space in your office or conference room by also using the
Polycom HDX 4000 series display as your computer monitor.
Check that the computer video is configured to use one of these supported
resolutions and refresh rates:
Resolution Refresh Rates (Hz)
VGA (640 x 480) 60, 72, 75, 85
SVGA (800 x 600) 60, 72, 75
XGA (1024 x 768) 60, 70, 75
HD 720p (1280 x 720) 50, 60
SXGA (1280 x 960) 60
SXGA (1280 x 1024) 60, 75
WSXGA+ (1680 x 1050) –
Recommended for HDX 4000 systems
with Hardware Version A
60
WSXGA+ (1600 x 900) – Recommended
for HDX 4000 systems with Hardware
Version C and HDX 4000 systems with
Hardware Version A that have been
upgraded to Monitor Hardware Version B
60