Grandstream Networks GXV34 0 Series

The default setting is “2”.
G726-32 Dynamic PT Species the G726-32 payload type, and the valid range is 96 to 126. The default setting is “126”.
Opus Payload Type
Denes the desired value (96-126) for the payload type of the Opus codec.
The default value is 123.
DTMF
Species the mechanism to transmit DTMF (Dual Tone Multi-Frequency) signals.
There are 3 supported modes: in audio, RFC2833, or SIP INFO.
● In audio, which means DTMF is combined in the audio signal (not very reliable with low-bit-rate
codecs).
● RFC2833, which means to specify DTMF with RTP packet. Users could know the packet is
DTMF in the RTP header as well as the type of DTMF.
● SIP INFO, which uses SIP INFO to carry DTMF. The defect of this mode is that it’s easily to
cause desynchronized of DTMF and media packet if the SIP and RTP messages are required to
transmitted respectively.
The default setting is “RFC2833”.
DTMF Payload Type
Congures the RTP payload type that indicates the transmitted packet contains DTMF digits. Valid
range is from 96 to 126.
Default value is 101.
Enable Audio RED with
FEC
If set to “Yes”, FEC will be enabled for audio call.
The default setting is “No”.
Audio FEC Payload Type
Congures audio FEC payload type. The valid range is from 96 to 126.
The default value is 121.
Audio RED Payload Type
Congures audio RED payload type. The valid range is from 96 to 126.
The default value is 124.
Silence Suppression
Enables the silence suppression/VAD feature. If it is set to “Yes”, when silence is detected, a small
quantity of VAD packets (instead of audio packets) will be sent during the period of no talking.
If set to “No”, this feature is disabled. The default setting is “No”.
Voice Frames Per TX
Congures the number of voice frames transmitted per packet. When conguring this, it should be
noted that the “ptime” value for the SDP will change with different congurations 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 inuence the audio
quality.
The default setting is 2.
Preferred Video Codec
Preferred Video Codec
Lists the available and enabled Video codecs for this account. Users can enable the specic video
codecs by moving them to the selected box and set them with a priority order from top to bottom.
This conguration will be included with the same preference order in the SIP SDP message.
Enable Video FEC
When enabled, the video sender will temporarily allocate part of the bandwidth to one data channel
to send FEC data to system, thus to improve the video quality the receiver gets. Enabling this
function will take up part of bandwidth and reduce call rate.
The default setting is “Yes”.
Enable RFC5168
Support
Enables/disables RFC5168 mechanism for video calls. RFC5168 allows SIP party to request the
sender to refresh its video frame in H.264, or refresh the full picture in VP8.
The default setting is “Yes”.