Feature Limitations - Polycom PVX Release Note

Feature Limitations

The following types of feature limitations are described in this section:
• Audio Issues
• Calling Issues
• Microsoft Windows Issues
• NAT/Firewall Traversal
• Network Issues
• Session Initiation Protocol (SIP) Issues
• User Interface
• ViaVideo and ViaVideo II Hardware Issues
• Video Issues
• VideoMail Issues
• Webcam Hardware Issues
Audio Issues
• When you upgrade from 6.0.2 to 8.0.2, the Echo Cancellation setting will
change from Off to Internal. Internal is the default setting for 8.0.2 and is
roughly equivalent to the Off setting in 6.0.2.
If you experience lip-sync and CPU usage problems when using PVX with a new
Logitech camera (such as the QuickCam Fusion and the QuickCam Pro 5000),
check if the camera has built-in AEC. If it does, disable AEC using the camera's
configuration software. You may also want to disable all other Logitech features,
such as face tracking. For more information, refer to the Selecting Audio and Video
Devices for Use with Polycom PVX document, available at
http://www.polycom.com/common/pw_item_show_doc/1,1276,4556,00.pdf.
• For optimum audio performance, connect an external microphone to the
same device as the external speaker set. Once connected, be sure to select the
device in the PVX audio options under Setup > Audio > Audio Input Device.
• You may experience audio anomalies using USB audio with your ViaVideo
or ViaVideo II cameras. Polycom recommends using analog audio instead.
• To minimize the echo that might be returned to the person at the far site, do
the following:
— Verify that Automatic Gain Control is enabled on the Setup > Audio
page.
— Reduce the volume of the local speakers.
— Separate the microphone and speakers as far as possible.
• You may notice loss of far-site audio when you speak at the same time as the
far site when using a ViaVideo or ViaVideo II camera.
• Many Bluetooth® headsets only support telephone quality audio and
degrade the wideband audio feature in PVX. Consider the frequency
response and convenience tradeoff when using a Bluetooth headset.
Release Notes
Polycom PVX Version 8.0.2
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