User's Manual

Grandstream Networks, Inc. GXV3175 USER MANUAL Page 50 of 60
FIRMWARE VERSION 1.0.1.1 Updated : 3/2012
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.
Account/Codec Settings
Start Video Automatically --YES: Accepts all incoming video, this is the default setting;
--NO: video is disabled.
--Enable/Disable during dialing: Dialing time choice to enable/disable video
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.
Enable RFC5168 support Select YES to enable RFC5168 support. The default is set to NO.
Video Bit Rate Rate of information content in a video stream. (Ranges from 32 – 1024
kbps)
H.264 Image Size Select the type of H.264 compression (4CIF, VGA, WQVGA, CIF, QVGA,
QCIF, QQVGA)
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.
SRTP Mode This is option to secure the RTP audio