Setting Audio Quality Preference - Polycom ViewStation FX4000 User Manual

ViewStation FX/VS4000 User Guide

Setting Audio Quality Preference

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For most cases, the default value of 0 is correct. Always use the
value 0 when connected to a PBX. A non-zero value should not
be required in Europe. Values greater than 31 are reserved for
internal use and must not be used.
In most cases, the default setting identified during the initial system
setup will be adequate for quality audio. However, the settings can
be changed based on specific bandwidth requirement in the Audio
Quality Preference screen.
The Audio Quality Preference screen lets you set the call speed
threshold that determines which audio protocol is used. At the
selected speed or lower, the system uses the G.728 audio protocol.
Above the selected speed, the system uses the G.722 audio protocol.
G.722 audio delivers higher quality audio, but uses 48 Kbps of the
video bandwidth. G.728 delivers telephone quality audio and uses
only 16 Kbps of the video bandwidth.
For more information about the G.728, G.722, and G.722.1 audio
protocols, refer to the Polycom Office Integrators' Reference Manual.
To access the Audio Quality Preference screen:
Select System Admin > Admin Setup > Video Network > IMUX >
Audio Quality.
To set your Audio Quality Preference:
Use the + and - buttons on the remote control to move the slider.
Changing the audio bars has no effect during an H.320 call. Note
that this screen is not accessible during an IP (H.323) call.
Note
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