Yealink SIP-T38G, Administrator'S Manual

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Administrator’s Guide for SIP-T3xG IP Phones
174
Codec Configuration Method Priority RTPmap
G722
Configuration Files
Web User Interface
4 9
G723_53
Configuration Files
Web User Interface
0 4
G723_63
Configuration Files
Web User Interface
0 4
G726_16
Configuration Files
Web User Interface
0 112
G726_24
Configuration Files
Web User Interface
0 102
G726_32
Configuration Files
Web User Interface
0 2
G726_40
Configuration Files
Web User Interface
0 104
iLBC_13_3 Configuration Files 0 97
iLBC_15_2 Configuration Files 0 97
Packetization Time
Ptime (Packetization Time) is measurement of the duration (in milliseconds) of the audio
data in each RTP packet sent to the destination, and hence it defines how much network
bandwidth is used for transfer of the RTP stream. Before establishing a conversation,
codec and ptime are negotiated through SIP signaling. The valid values of ptime range
from 10 to 60, in increments of 10 milliseconds. The default ptime is 20ms. You can also
disable the ptime negotiation.
Procedure
Configuration changes can be performed using the configuration files or locally.
Configuration File <MAC>.cfg
Configure the codecs to use on
a per-account basis.
Configure the priority and
rtpmap for the enabled codec.
For more information, refer to
Audio Codecs on page 299 .
Configure the ptime.
For more information, refer to