User's Manual

GXV3275 User Manual
GXV3275 WEB GUI
Grandstream Co., Ltd
Software Version：1.0.0.9 Document Version：0.2
154
Figure 144 GXV3275 Web GUI Account- Codec Settings
Table 15 Account/Codec Settings Parameters
Parameters
Description
DTMF
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),
Via RTP (RFC2833). DTMF signal with identified RTP packets, it can be learnt that
the package in the RTP packet header is DTMF packet and the type of DTMF signal.
Via SIP INFO. Use INFO message of SIP signaling to carry DTMF signal. The main
deficiency is DTMF signal and media package may not synchronized due to the
separate transition of SIP control signaling and Real Time Protocol (RTP).
The default is RFC2833.
x-PDFDivision