Polycom SIP 3.1 Administrator's Manual page 192

Administrator's Guide SoundPoint IP / SoundStation IP
Algorithm MIME Type
G.711μ-law PMCU
G.711a-law PCMA
G.722 G722/8000
G.722.1 G7221/16000
G.722.1C G7221/
32000
G.729AB G729
Lin16 L16/16000
L16/32000
L16/48000
Siren14 SIREN14/
16000
Siren22 SIREN22/
48000
Attribute
voice.codecPref.G711Mu
voice.codecPref.G711A
voice.codecPref.G729AB
A - 38
Voice Coding Algorithms <codecs/>
The following voice codecs are supported:
Label Bit Rate
G711mu 64 Kbps
G711A 64 Kbps
G722 64 Kbps
G7221 16 Kbps,
24 Kbps,
32 Kbps
G7221C 24 Kbps
32 Kbps
48 Kbps
G729AB 8 Kbps
L16 25.6 Kbps
51.2 Kbps
76.8 Kbps
SIREN14 24 Kbps
32 Kbps
48 Kbps
SIREN22 32 Kbps
48 Kbps
64 Kbps
These codecs include:
• Codec Preferences <codecPref/>
• Codec Profiles <audioProfile/>
Codec Preferences <codecPref/>
Permitted
Values
Null, 1-3
Sample
Rate Frame Size
8 Ksps 10ms - 80ms
8 Ksps 10ms - 80ms
16 Ksps 10ms - 80ms
16 Ksps 20ms - 80ms
32 Ksps 20ms - 80ms
8 Ksps 10ms - 80ms
16 Ksps 10ms
32 Ksps
48 Ksps
32 Ksps 20ms - 80ms
48 Ksps 20ms - 80ms
Default Interpretation
1 Specifies the codec preferences for
SoundPoint IP 320, 330, 430, 500, 501,
2
600 and 601 platforms.
1 = highest
3
3 = lowest
Null = do not use
Give each codec a unique priority, this will
dictate the order used in SDP negotiations.
Effective Audio
Bandwidth
3.5 KHz
3.5 KHz
7 KHz
7 KHz
14 KHz
3.5 KHz
7 KHz
14 KHz
22 KHz
14 KHz
22 KHz