Grandstream GXV3140 User Manual - Manual (Page 51)

FIRMWARE VERSION 1.0.7.80 GXV3140 USER MANUAL Page 51 of 151
from Known Servers coming from the configured SIP Server and Outbound Proxy.
SIP T1 Timeout This configures the timeout period for SIP T1. The default setting is 0.5
Seconds.
SIP T2 Interval This configures the time interval for SIP T2. The default setting is 4
seconds.
Remove OBP from route The SIP Extension notifies the SIP server that it is behind a NAT/firewall.
Omit Charset Attribute in
SIP Message
If enabled, the Content-Type header in the SIP MESSAGE request will not
contain “charset=UTF-8” parameter. This is to maintain comparability with
some servers such as Asterisk. Default setting is “No”.
Account/Codec Settings
DTMF Assigns the mechanism to send DTMF. There are three supported modes:
in audio (with DTMF as audio signals), through RTP and through SIP INFO.
DTMF Payload Type Sends DTMF using RFC2833. The default is 101.
Preferred Vocoder This products supports up to 8 different Vocoders: including
G.711(a/μ)(PCMU/PCMA),GSM,G726-32,G.723.1,G.729A/B, G.722 and
L16-256.
When this has been configured, the system will select the preferred
vocoder from the list and the same order is sent with the SDP messages.
The user can change the preferred vocoder priority order by toggling with
the up and down buttons. It is recommended to use the default setting
“PCMU”; if other vocoders are chosen, there could be an audio
transmission error.
Preferred Video Codec Selects the preferred video codec from the available list. It is recommended
to use H.264.
H.264Payload type Selects the dynamic H.264 codec payload type (ranges from 96-127). The
default setting is 99.
H.263+ Payload type Selects the H.263+ codec payload type (ranges from 96-127). The default
setting is 103.
L16-256 Payload type Selects the L16-256 codec payload type (ranges from 96-127). The default
setting is 103.
H.263 Encoder Resolution Selects the resolution (CIF/QCIF) used for H.263 codec. The default
resolution is CIF.
Silence Suppression This controls the G723/G729 silence suppression/VAD. If set to YES, when
no audio is detected, the phone will send a small number of VAD packets
(instead of audio packets). If Set to NO, this feature is disabled. The default
setting is NO.