Administrator’s Guide for Polycom HDX Systems
2–20 Polycom, Inc.
For more information about Polycom support for the TIP protocol, refer to the
Polycom Unified Communications Deployment Guide for Cisco Environments.
RTV and Lync-Hosted Conference Support
To use RTV in a Lync-hosted conference, you must have the RTV option key
enabled on one of the following HDX systems:
• Polycom HDX 9006
• Polycom HDX 8000 with Hardware Version B
• Polycom HDX 7000 with Hardware Version C or D
• Polycom HDX 6000
• Polycom HDX 4500
• Polycom HDX 4000 with Hardware Version C
For more information about configuring your Lync Server video settings for
RTV, refer to the Polycom Unified Communications Deployment Guide for
Microsoft Environments.
Specifying Quality of Service
Set the Quality of Service options for the way your network handles IP packets
during video calls.
Polycom Video Error Concealment and Dynamic Bandwidth
You can handle video quality issues by enabling the PVEC (Polycom Video
Error Concealment) setting, the Dynamic Bandwidth setting, or both settings.
If both settings are enabled, Dynamic Bandwidth adjusts the Video Rate in
order to reduce packet loss to 3% or less. When the Packet Loss drops to 3% or
less, PVEC cleans up the video image on your monitor. The additional
processing power required might cause the Video Rate to drop while the
system is using PVEC. If this happens, the Call Statistics screen shows the
Video Rate Used as lower than the Video Rate. If Packet Loss is 0 for at least 10
minutes, PVEC stops operating and the Video Rate Used increases to match
the Video Rate.
If only PVEC is enabled and the system detects Packet Loss, PVEC attempts to
clean the image but the Video Rate is not adjusted. If only Dynamic Bandwidth
is enabled and the system detects Packet Loss of 3% or more, the Video Rate is
adjusted but PVEC does not clean the image.
You can view % Packet Loss, Video Rate, and Video Rate Used on the Call
Statistics screen. Press Info on the remote control during a call to get to the Call
Statistics screen.
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