Polycom 1725-11530-310 用户手册
Administrator’s Guide SoundPoint IP / SoundStation IP
A - 38
Voice Coding Algorithms <codecs/>
The following voice codecs are supported:
These codecs include:
•
•
Codec Preferences <codecPref/>
Algorithm
MIME Type
Label
Bit Rate
Sample
Rate
Rate
Frame Size
Effective Audio
Bandwidth
Bandwidth
G.711
μ-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
24 Kbps,
32 Kbps
16 Ksps
20ms - 80ms
7 KHz
G.722.1C
G7221/
32000
32000
G7221C
24 Kbps
32 Kbps
48 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
L16/32000
L16/48000
L16
25.6 Kbps
51.2 Kbps
76.8 Kbps
51.2 Kbps
76.8 Kbps
16 Ksps
32 Ksps
48 Ksps
32 Ksps
48 Ksps
10ms
7 KHz
14 KHz
22 KHz
14 KHz
22 KHz
Siren14
SIREN14/
16000
16000
SIREN14
24 Kbps
32 Kbps
48 Kbps
32 Kbps
48 Kbps
32 Ksps
20ms - 80ms
14 KHz
Siren22
SIREN22/
48000
48000
SIREN22
32 Kbps
48 Kbps
64 Kbps
48 Kbps
64 Kbps
48 Ksps
20ms - 80ms
22 KHz
Attribute
Permitted
Values
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.
SoundPoint IP 320, 330, 430, 500, 501,
600 and 601 platforms.
1 = highest
3 = lowest
Null = do not use
3 = lowest
Null = do not use
Give each codec a unique priority, this will
dictate the order used in SDP negotiations.
dictate the order used in SDP negotiations.
voice.codecPref.G711A
2
voice.codecPref.G729AB
3