Grandstream Networks GSC3570 User Manual page 47

Jitter
Selects either Fixed or Adaptive for jitter buffer type, based on network conditions. The default setting is
Buffer
"Adaptive".
Type
Jitter
Buffer Selects jitter buffer length from 100ms to 800ms, based on network conditions. The default setting is "300ms".
Length
Configures the number of voice frames transmitted per packet. When configuring this, it should be noted that
Voice
the "ptime" value for the SDP will change with different configurations here. This value is related to the codec
Frames
used and the actual frames transmitted during the in-payload call. For end users, it is recommended to use the
Per TX
default setting, as incorrect settings may influence the audio quality. The default setting is 2.
This option determines the encoding rate for G723 codec. Users can choose from 6.3kbps encoding rate and
G723
5.3kbps encoding rate.
Rate
The default setting is "5.3kbps encoding rate".
iLBC
This option determines the iLBC packet frame size. Users can choose from 20ms and 30ms. The default setting
Frame
is "30ms".
Size
iLBC
Payload This option is used to specify iLBC payload type. Valid range is 96 to 127. The default setting is "97".
Type
OPUS
Specifies OPUS payload type. Valid range is 96 to 127. Cannot be the same as iLBC or DTMF Payload Type.
Payload
Default value is 123.
Type
DTMF
Payload Configures the payload type for DTMF using RFC2833. Cannot be the same as iLBC or OPUS payload type.
Type
This parameter specifies the mechanism to transmit DTMF digits.
There are 3 supported modes:
• In audio: DTMF is combined in the audio signal (not reliable with low-bit-rate codecs).
Send
• RFC2833 sends DTMF with RTP packet. Users can check the RTP packet to see the DTMFs sent as well as the
DTMF
number pressed.
• SIP INFO uses SIP INFO to carry DTMF.
Default setting is "RFC2833".
DTMF
Configures the delay between sending DTMF (in milliseconds). Default is 250 ms.
Delay
Video
Settings