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FIRMWARE VERSION 1.0.1.38 GXV3175V2 USER MANUAL Page 58 of 138
TX” is set to 2. Then in the INVITE request, the “ptime” value for SDP will be
60 ms. This is because the G723 voice frame is 30 ms. Similarly, if the
setting is 2 and the codec is G729 or G711 or G726, the “ptime” value for
SDP in the INVITE request will be 20 ms.
If the voice frames per TX configuration exceeds the maximum value
allowed, the phone will choose the preferred codec and use the maximum
value allowed.
The maximum value is 64 frames.
Adjusting these values will also change the jitter buffer. The phone has an
algorithm for setting the jitter buffer and the jitter buffer rate is around
20-200ms.
For end-users, it is recommended to use the default setting, as incorrect
settings may influence the quality of audio.
G723 Rate
This defines the encoding rate for G723 vocoder, and can be 6.3Kb/s or
5.3Kb/s. Please confirm with your service provider.
Jitter Buffer Type
Users can select either Fixed or Adaptive based on network conditions. The
default is Adaptive.
Jitter Buffer Length
User can select Low, Medium, or High based on network conditions. The
default is Medium.
Send Silent RTP Packets
on Mute
Default is No. If set to “Yes”, silent RTP packets will be sent on Mute.
Account/Call Settings
Start Video Automatically
Default is Yes.
Remote Video Request
This field sets the preference of video request handling during an audio call
prompt the user, accept automatically or deny automatically.
Dial Plan Prefix
Sets the prefix added to each dialed number.
Dial Plan
Dial Plan Rules:
1. Accepted Digits: 1,2,3,4,5,6,7,8,9,0 , *, #, A,a,B,b,C,c,D,d
2. Grammar: x - any digit from 0-9;
a) xx+ - at least 2 digit numbers
b) xx. - only 2 digit numbers
c) ^ - exclude
d) [3-5] - any digit of 3, 4, or 5
e) [147] - any digit of 1, 4, or 7
f) <2=011> - replace digit 2 with 011 when dialing
g) | - the OR operand
58


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