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ViewStation EX, ViewStation FX, and VS4000 API Guide    
© Polycom, Inc. 2003
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h331audiomode <g728|g711u|g711a|g722-56|
 
g722-48|off|get> 
Description
This command sets the H.331 audio protocol for transmitting audio 
in broadcast mode. Broadcast configuration parameters should be 
set to accommodate the lowest common denominator of the 
systems which are receiving the broadcast.
g728
ITU-T Recommendation for audio encoding using Low 
Delay Code Excited Linear Prediction (CELP). The 
bandwidth of the analog audio signal is 3.4 kHz 
whereas after coding and compression the digitized 
signal requires a bandwidth of 16 Kbps.
g711u
CCITT (now called ITU-T, which is International 
Telecommunications Union's Telecommunications 
Standardization Sector) Recommendation entitled 
"Pulse Code Modulation (PCM) of Voice Frequencies."  
G.711 defines how a 3.1 kHz audio signal is encoded at 
64 Kbps using PCM and either mu-law (US and Japan) 
or A-law (Europe).
g711a
Same as g711u, but uses A-law (Europe).
g722-56
CCITT Recommendation that defines how a 7.5 kHz 
audio signal is encoded at a data rate of 64 Kbps.
g722-48
CCITT Recommendation that defines how a 7.5 kHz 
audio signal is encoded at a data rate of 64 Kbps.
off
Turns the audio mode off.
get
Displays the current setting for this option.
Example
h331audiomode g728
h331audiomode