Grandstream GXV3240 Administration Guide - Manual (Page 59)

Firmware Version 1.0.3.37 GXV3240 Administration Guide Page 57 of 117
ACCOUNT/CODEC SETTINGS
DTMF
It is used to set the parameter to specify 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 use 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
It is used to configure the RTP payload type that indicates the
transmitted packet contains DTMF digits. The valid range is from 96 to
127.
Preferred Vocoder
It lists the available and enabled audio codecs for this account. Users
can enable the specific audio codecs by moving them to the Selected
box and set them with a priority order from top to bottom. This
configuration will be included with the same preference order in the
SIP SDP message.
iLBC Frame Size
It is used to set the iLBC (Internet Low Bitrate Cidec) frame size if iLBC
is used. Users can select it from 20ms or 30ms. The default setting is
30ms.
G726-32 ITU Payload
This option is used to configure G726-32 payload type for ITU packing
mode. Payload 2 is static and payload dynamic is dynamic. The default
setting is “2”.
G726-32 Dynamic PT
This option is used to configure G726-32 payload type, and the valid
range is 96 to 127. The default setting is “126”.
Opus Payload Type
It is used to enter a desired value (96-127) for the payload type of the
Opus codec. The default value is 123.
Enable RFC5168 Support
If set to “Yes”, the RFC5168 mechanism will be enabled for video call.
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
“No”.
Packetization-mode
This option is used to configure the packetization mode (0 or 1) for the
video packets during the video calls. The default setting is “1”.
H.264 Image Size It is used to set the H.264 image size. It can be selected from the