Polycom ViewStation EX4000 - Manual (Page 27)

Chapter 2 - Technical Information
© Polycom, Inc. 17
The following table gives information about audio features.
The following table gives information about the microphone pods
supplied with the ViewStation EX, ViewStation FX, and VS4000
systems.
Table 2-9. Audio Features
Parameter Value/format
Audio codecs a
a. The protocol used depends on the protocols supported by the
opposite endpoint and on the line rate. Audio protocol is selected
automatically to provide optimum audio clarity.
G.711, G.722, G.722.1 b , G.728
b. Provides enhanced frame loss compensation.
Mode Full duplex
Gain control Automatic
Noise suppression Automatic
Echo cancellation Instant adaptation
Table 2-10. Microphone Pods
Parameter Value/description
Pick-up elements 3 hypercardioid pressure-zone microphones
Coverage 360°
Placement Minimum 6 ft (1.8 m) from speakers
Minimum 15 ft (4.6 m) from any other microphone