Yealink CP969, Administrator'S Manual

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Configuring Audio Features
631
Codec Algorithm Reference Bit Rate
Sample
Rate
Packetization
Time
G726-24 G.726 RFC 3551 24 Kbps 8 Ksps 20ms
G726-32 G.726 RFC 3551 32 Kbps 8 Ksps 20ms
G726-40 G.726 RFC 3551 40 Kbps 8 Ksps 20ms
G723_53/
G723_63
G.723.1 RFC 3551
5.3 Kbps
6.3 Kbps
8 Ksps 30ms
iLBC iLBC RFC 3952
15.2 Kbps
13.33 Kbps
8 Ksps
20ms
30ms
Opus Opus RFC 6716
8-12 Kbps
16-20 Kbps
28-40 Kbps
48-64 Kbps
64-128 Kbps
8 Ksps
12 Ksps
16 Ksps
24 Ksps
48 Ksps
20ms
Note
Codecs and priorities of these codecs are configurable on a per-line basis. The attribute “rtpmap”
is used to define a mapping from RTP payload codes to a codec, clock rate and other encoding
parameters.
The corresponding attributes of the codec for SIP-T58V/T58A/T56A are listed as follows:
Codec Configuration
Methods
Priority RTPmap
G.722.1c(48kb/s)
Configuration Files
Web User Interface
1 121
G.722.1c(32kb/s)
Configuration Files
Web User Interface
2 122
G.722.1c(24kb/s)
Configuration Files
Web User Interface
3 123
G.722.1(24kb/s)
Configuration Files
Web User Interface
4 124
G722
Configuration Files
Web User Interface
5 9
PCMU Configuration Files 6 0
The network bandwidth necessary to send the encoded audio is typically 5~10% higher than the
bit rate due to packetization overhead. For example, a two-way G.722 audio-only call at 64 Kbps
consumes about 135 Kbps of network bandwidth.