Account/Codec Settings - Grandstream Networks GXV3240 Administration Manual

ACCOUNT/CODEC SETTINGS

DTMF
DTMF Payload Type
Preferred Vocoder
iLBC Frame Size
Enable RFC5168 Support
H.264 Image Size
Firmware Version 1.0.3.6
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".
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.
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.
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.
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".
It is used to set the H.264 image size. It can be selected from the
dropdown list.

720P

4CIF

VGA

CIF

QVGA

QCIF
The default setting is 720P.
GXV3240 Administration Guide Page 50 of 105