Polycom ViewStation - Manual (Page 58)

Chapter 2 Optional Configurations
ViewStation User Guide 42 www.polycom.com
Note If this process is canceled, the ViewStation reboots and the
entire setup procedure must be redone.
Figure 2-10. Auto Detect SPIDs Screen
Audio Quality
The Audio Quality Preference screen (System Info > Admin
Setup > Video Network > IMUX > Audio Quality) allows the
selection of an audio protocol. G.722 audio delivers a higher quality
of audio than G.728 and uses 48 Kbps of the call bandwidth. G.728
delivers telephone quality audio and only uses 16 Kbps of the call
bandwidth. G.728 is generally used for lower data rates.
To set the audio protocol, use the + and - zoom buttons on the
remote control to move the slider.
Note Changing the audio quality preferences during a call can be
done only while in an H.320 call. No changes can be made
while in an H.323 call.