User's Manual

GXV3240 User Manual
GXV3240 WEB GUI
Grandstream Co., Ltd
Software Version：1.0.0.11 Document Version：0.1
151
Voice Frames Per
TX
Configures the number of voice frames transmitted per packet.( The maximum value
of IS limit that based on Ethernet packets is recommended to be 1500 bytes or
120Kbit/s)
When configuring this, it should be noted that the "ptime" value for the SDP will
change with different configurations here. This value is related to the codec used and
the actual frames transmitted during the in payload call.
i.e., If set the first code to G. 723 and “voice frame/TX" to 2, for the reason G. 723
voice frame includes 30 milliseconds of audio, the "ptime" value is 60 milliseconds
in the SDP packet of INVITE request. Similarly if set the first code to G. 729/ G. 711/
G. 726 and “voice frame/TX" to 2, then the "ptime" value is 20 milliseconds.
If the "Speech frame/TX” exceeds its the maximum value, the phone will save the
maximum value to correspond with the choice of the first coding.
PCM maximum value: 10 frame (x10 milliseconds) ;
G.726 maximum value: 20 frame (x10 milliseconds) ;
G.723 maximum value: 32 frame (x10 milliseconds) ;
G.729 maximum value: 64 frame (x10 milliseconds) ;
Adjust the above parameters will also change the dynamic jitter buffer. The phone
has a dynamic jitter buffer processing algorithm. The jitter buffer scope is 20 to 200
milliseconds.
For end users, it is recommended to use the default setting, as incorrect settings may
influence the audio quality.
Jitter Buffer Type
Selects either Fixed or Adaptive based on network conditions. The default setting is
"Adaptive".
x-PDFDivision