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Administrator’s Guide SoundPoint IP / SoundStation IP
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Voice Coding Algorithms <codecs/>
The following voice codecs are supported:
These codecs include:
• Codec Preferences <codecPref/>
• Codec Profiles <audioProfile/>
Codec Preferences <codecPref/>
Algorithm MIME Type Label Bit Rate
Sample
Rate Frame Size
Effective Audio
Bandwidth
G.711μ-law PMCU G711mu 64 Kbps 8 Ksps 10ms - 80ms 3.5 KHz
G.711a-law PCMA G711A 64 Kbps 8 Ksps 10ms - 80ms 3.5 KHz
G.722 G722/8000 G722 64 Kbps 16 Ksps 10ms - 80ms 7 KHz
G.722.1 G7221/16000 G7221 16 Kbps,
24 Kbps,
32 Kbps
16 Ksps 20ms - 80ms 7 KHz
G.722.1C G7221/
32000
G7221C 24 Kbps
32 Kbps
48 Kbps
32 Ksps 20ms - 80ms 14 KHz
G.729AB G729 G729AB 8 Kbps 8 Ksps 10ms - 80ms 3.5 KHz
Lin16 L16/16000
L16/32000
L16/48000
L16 25.6 Kbps
51.2 Kbps
76.8 Kbps
16 Ksps
32 Ksps
48 Ksps
10ms 7 KHz
14 KHz
22 KHz
Siren14 SIREN14/
16000
SIREN14 24 Kbps
32 Kbps
48 Kbps
32 Ksps 20ms - 80ms 14 KHz
Siren22 SIREN22/
48000
SIREN22 32 Kbps
48 Kbps
64 Kbps
48 Ksps 20ms - 80ms 22 KHz
Attribute
Permitted
Values
Default Interpretation
voice.codecPref.G711Mu Null, 1-3 1 Specifies the codec preferences for
SoundPoint IP 320, 330, 430, 500, 501,
600 and 601 platforms.
1 = highest
3 = lowest
Null = do not use
Give each codec a unique priority, this will
dictate the order used in SDP negotiations.
voice.codecPref.G711A 2
voice.codecPref.G729AB 3