User's Manual Part 1

Grandstream Networks, Inc. GXV3175 USER MANUAL Page 35 of 68
FIRMWARE VERSION 1.0.0.32 Updated : 11/2010
Tone disabled.
Disable Direct IP Call
The default setting is No. If set to Yes, Direct IP calling will be
disabled.
Offhook Auto Dial
Configure a User ID/extension to dial automatically when the phone
is taken offhook. By default, the phone will use the first account to
dial out.
Advanced Settings/Video Settings
Enable Motion Detection
The phone will exit idle/screensaver mode if motion is detected. The
default setting is Yes.
Video Frame rate
The Default value is 15 frames/second. The video frame rate is
adjustable based on network conditions.
Increasing the frame rate will increase the amount of transferred data
significantly therefore consuming more bandwidth. Lack of bandwidth
will impair the video due to packet loss.
Video Packet Size
The Default value is 1400, range from 100 to 1400.
It is recommended to use 600~800 if you have an Outbound Proxy
or Media Gateway.
Video Rate Control
Frame, TMN8 or GOP. The Default setting is Frame.
TMN8 is good for bandwidths larger than 384kbps
Video Frame Skipping
Skips bad video frames as they are received
The Default setting is No.
I-Frame Reference Only
When enabled, all P frames will only have reference to previous I
frames. This method may improve video quality when the network
has heavy packet loss. It will have modest increase in bandwidth
usage. The Default setting is No.
Packetization-Mode
The packetization mode (0 or 1) for the H.264 video packets. The
default setting is 0.
Redundant P-frame
This setting allows the phone to send redundant P-frames of I
frames. When an I frame is delayed or has packet loss, the
redundant P-frames will be used instead. It may make video phone
call less prone to errors and thus make the video stream more robust
towards error propagation, but may increase bandwidth usage. The
default setting is set to No.
Adaptive MB Intra
Refresh
This parameter specifies whether Adaptive MB Intra Refresh is used
or not. It may protect most important MBs (macro blocks) subjected
to packet loss and to avoid error propagation. The intra-refresh rate
is adapted according to the video packet loss rate. It may increase
bandwidth usage. The default setting is set to No.
Video Packet Loss Rate
Specifies the video packet loss rate for the Adaptive MB Intra
Refresh. Users can choose from: Less than 5%, Less than 10%,
Less than 15%, Less than 20%, Less than 25%. The default setting
is set to Less than 10%.
Advanced Settings/Ring Tone
Call Progress Tones:
Dial Tone
Ring Back Tone
Using these settings, users can configure ring or tone frequencies
based on parameters from the local telecom provider. By default,
they are set to the North American standard.
Frequencies should be configured with known values to avoid