Yealink SIP-T48G Administrator's Manual page 505

Details of Configuration Parameters:
Parameters
voice.jib.adaptive
Description:
Configures the type of jitter buffer.
0-Fixed
1-Adaptive
Web User Interface:
Settings->Voice->JITTER BUFFER->Type
Phone User Interface:
None
voice.jib.min
Description:
Configures the minimum delay time (in milliseconds) of jitter buffer.
Note: It works only if the parameter "voice.jib.adaptive" is set to 1 (Adaptive).
Web User Interface:
Settings->Voice->JITTER BUFFER->Min Delay
Phone User Interface:
None
voice.jib.max
Description:
Configures the maximum delay time (in milliseconds) of jitter buffer.
Note: It works only if the parameter "voice.jib.adaptive" is set to 1 (Adaptive).
Web User Interface:
Settings->Voice->JITTER BUFFER->Max Delay
Phone User Interface:
None
Configuring Audio Features
Navigate to:
http://<phoneIPAddress>/
servlet?p=settings-voice&
q=load
Permitted Values
0 or 1
Integer from 0 to 400
Integer from 0 to 400
Default
1
60
240
491