Grandstream Networks GXP1625 Administration Guide

GXP16XX Administration Guide
Version 1.0.4.100
P a g e | 35
Silence Suppression
Controls the silence suppression/VAD feature of the audio codecs except for
G.723 (pending) and G.729. If set to “Yes”, a small quantity of RTP packets
containing comfort noise will be sent during the periods of silence. If set to “No”,
this feature is disabled. 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 in payload during the call. For end users, it is
recommended to use the default setting, as incorrect settings may influence the
audio quality. The default setting is 2.
G723 Rate
This option determines the encoding rate for G723 codec. Users can choose
from 6.3kbps encoding rate and 5.3kbps encoding rate. The default setting is
“5.3kbps encoding rate”.
G.726-32 Packing
Mode
Selects “ITU” or “IETF” for G.726-32 packing mode.
The default setting is “IETF”.
iLBC Frame Size
This option determines the iLBC packet frame size. Users can choose from
20ms and 30ms. The default setting is “30ms”.
iLBC payload Type
This option is used to specify iLBC payload type. Valid type is 96-127.
Jitter Buffer Type
Selects either Fixed or Adaptive based on network conditions. The default
setting is “Adaptive”.
Jitter Buffer Length
Defines jitter buffer length based on network conditions.
Hide Vocoder
Hides vocoder information on call screen when set to “yes”.
Default settings is “No”.
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 responses. 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;
3. Grammar: X – any character from 0-9, a-z, A-Z.
a) xx+ - at least 2 digit numbers
b) xx – only 2 digit numbers
c) XX – two characters ( AA, Ab, 1C, f5, 68,…)
d) \t\e\s\t : only string “test” will pass the dial plan check
e) ^ - exclude
f) [3-5] – any digit of 3, 4, or 5
g) [147] – any digit of 1, 4, or 7

Grandstream Networks GXP1625 Specifications

General

Brand	Grandstream Networks
Model	GXP1625
Category	IP Phone
Language	English