User's Manual
GXV3240 User Manual 
GXV3240 WEB GUI 
Grandstream Co., Ltd 
Software Version:1.0.0.11 Document Version:0.1 
150 
DTMF  Payload 
Type   
Species the DTMF payload type using RFC2833. The default is 101. 
Preferred Vocoder   
5  different  vocoder  types  are  supported  on  the  phone,  including  PCMA,  PCMU, 
G.722, G.726-32, iLBC.   
Users  can  configure  vocoders  in  a  preference  list  that  is  included  with  the  same 
preference order in SDP message.   
iLBC Frame Size 
20 ms or 30 ms is optional. 
Support RFC5168 
If set to “Yes”, the video call would support RFC5168. The default setting is "No". 
H.264 Image Size 
Supports 720P、4CIF、VGA  、CIF、  QVGA、  QCIF. 
H.264 Profile Type   
There are 4 options available: Baseline Profile, Main Profile, High Profile, BP/MP/HP. 
Video Bite Rate 
Configure the bite rate for video call. The default setting is "2048kbps ". 
SDP Bandwidth 
Attribute 
Standard, Media Level, Session Level, No 
H.264  Payload 
Type 
Input H.264Payload value. The range is 96-127. The default setting is 99. 
SRTP 
The  default  setting  is  "Disable".  Users  could  choose  force  SRTP  execution  or 
execute SRTP with negotiation mode. 
Silence 
suppression 
Controls the Silence suppression/ Voice activity detection(VAD).If set to “Yes”, the 
phone will send a small quantity of VDA packets other than the voice packets when 
no voice stream detected during a call. The default setting is "No". 
x-PDFDivision










