User's Manual

FIRMWARE VERSION 1.0.1.14 GXP2130/GXP2140/GXP2160 USER MANUAL Page 54 of 84
"Disabled".
Symmetric RTP
Defines whether symmetric RTP is supported or not. The default setting is
"No".
Silence Suppression
Controls the silence suppression/VAD feature of the audio codec G.729. If set
to "Yes", when silence is detected, a small quantity of VAD packets (instead of
audio packets) will be sent during the period of no talking. If set to "No", this
feature is disabled. The default setting is "No".
Voice Frames Per TX
Configures the number of voice frames transmitted per packet. When
configuring this, it should be noted that the "ptime" value for the SDP will
change with different configurations here. This value is related to the codec
used and the actual frames transmitted during the in payload call. For end
users, it is recommended to use the default setting, as incorrect settings may
influence the audio quality.
G.726-32 Packing Mode
Selects "ITU" or "IETF" for G726-32 packing mode.
Jitter Buffer Type
Selects either Fixed or Adaptive based on network conditions. The default
setting is "Adaptive".
Jitter Buffer Length
Selects Low, Medium, or High based on network conditions. The default
setting is "Medium".
Account x -> Call Settings
Early Dial
Selects whether or not to enable early dial. If it's set to "Yes", the SIP proxy
must support 484 response. The default setting is "No".
Dial Plan Prefix
Sets the prefix added to each dialed number.
Dial Plan
A dial plan establishes the expected number and pattern of digits for a
telephone number. This parameter configures the allowed dial plan for the
phone.
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}