User's Manual

Grandstream Networks, Inc. GXV3140 USER MANUAL Page 36 of 83
FIRMWARE VERSION 1.0.1.18 Updated : 09/2009
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 values: For PCM is 0 frames (x10ms) ; for G76 is 20 frames (x10
ms); for G723 is 32 frames (x30 ms); for G728/G728 is 64 frames (x10ms) and
64 frames (x2.5 ms) respectively.
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.
Account/Call Settings
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
• Example 1: {[369]11 | 1617xxxxxxx}
Allow 311, 611, and 911 or any 10 digit numbers with leading digits 1617
• Example 2: {^1900x+ | <=1617>xxxxxxx}
Block any number of leading digits 1900 or add prefix 1617 for any dialed 7 digit
numbers