User's Manual

Firmware Version 1.0.1.54
GXV3240D Administration Guide
Page 43 of 83
ACCOUNT/CODEC SETTINGS
DTMF
This parameter specifies the mechanism to transmit DTMF digits.
There are 3 supported modes: in audio which means DTMF is
combined in the audio signal (not very reliable with low-bit-rate
codecs), via RTP (RFC2833), or via 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 for the reason the SIP and RTP are transmitted respectively.
The default setting is "RFC2833".
DTMF Payload Type
This parameter sets the payload type for DTMF using RFC2833.
Default is 101. The valid range is from 96 to 127.
Preferred Vocoder
Multiple vocoder types are supported on the phone, the vocoders in
the list is a higher preference. Users can configure vocoders in a
preference list that is included with the same preference order in SDP
message.
ILBC Frame Size
Select the iLBC frame size when iLBC is selected. Users can select
20ms or 30ms. The default setting is 30ms.
Enable RFC5168 Support
If set to "Yes", RFC5168 support will be enabled for video call. The
default setting is "No".
H.264 Image Size
Select the H.264 image size from "720P" "4CIF" "VGA" "CIF" "QVGA"
and "QCIF". The default setting is 720P.
Note: For some network environment, the default setting "720P"
"Broadsoft" and "Enable SCA" is set to "Yes".
Line-seize Timeout
For Shared Call Appearance, phone must send a SUBSCRIBE
request for the line-seize event package whenever a user attempts to
take the shared line off hook. "Line Seize Timeout" is the line-seize
event expiration timer. The default value is 15 seconds. The valid
range is from 15 to 60.