Grandstream Networks GRP261 Series Administration Manual page 31

G.726-32 Packing Mode
OPUS Payload Type
Send DTMF
DTMF Delay
DTMF Payload Type
Silence Suppression
Jitter Buffer Type
Jitter Buffer Length
Voice Frames Per TX
G723 Rate
RTP Settings
SRTP Mode
Selects "ITU" or "IETF" for G726-32 packing mode.
The default setting is "ITU".
Specifies OPUS payload type. Valid range is 96 to 127. Cannot be the same as
iLBC or DTMF Payload Type.
Default value is 123.
This parameter specifies the mechanism to transmit DTMF digits. There are 3
supported modes:
● In audio: DTMF is combined in the audio signal (not very reliable with low-
bit-rate codecs).
● RFC2833 sends DTMF with RTP packet. Users can check the RTP packet to
see the DTMFs sent as well as the number pressed.
● SIP INFO uses SIP INFO to carry DTMF.
Default setting is "RFC2833".
Configures the delay between sending DTMF during MPK/VPK use (in
milliseconds).
Default is "250" ms.
Configures the payload type for DTMF using RFC2833. Cannot be the same as
iLBC or OPUS payload type.
Controls the silence suppression/VAD feature of the audio codecs except
forG.723 (pending) and G.729. If set to "Yes", a small quantity of RTP packets
containing comfort noise will be sent during the periods of silence. If set to
"No", this feature is disabled.
Default setting is "No"
Selects either Fixed or Adaptive for jitter buffer type, based on network
conditions.
The default setting is "Adaptive".
Selects jitter buffer length from 100ms to 800ms, based on network
conditions.
The default setting is "300ms".
Configures the number of voice frames transmitted per packet. 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. For end
users, it is recommended to use the 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 5.3kbps encoding rate.
The default setting is "5.3kbps encoding rate".
Enable SRTP mode based on your selection from the drop-down menu.
● No
● Enabled But Not forced
● Enabled and Forced
● Optional
The default setting is "No".