Grandstream Networks DP752 Administration Manual page 55

Silence Allows detecting the absence of audio and conserves bandwidth by preventing the
Suppression (VAD) transmission of "silent packets" over the network. Default is No.
Jitter Buffer Type Selects jitter buffer type (Fixed or Adaptive) based on network conditions.
• High (initial 200ms, min 40ms, max 600ms) Note: not all vocoders can meet
Jitter Buffer Length
• Medium (initial 100ms, min 20ms, max 200ms).
• Low (initial 50ms, min 10ms, max 100ms).
Voice Monitoring
Enable RTCP Enables RTCP statistics and control information. Default settings is RTCP.
Call Settings
Early Dial Sends an early INVITE each time a key is pressed when a user dials a number.
Otherwise, only one INVITE is sent after full number is dialed (user presses Dial
Key or after "no key entry timeout" expires). This option should be used only if there
is a SIP proxy configured and supporting "484 Incomplete Address" responses.
Otherwise, the call will likely be rejected by the proxy (with a 404 Not Found error).
Default is No.
This feature is NOT designed to work with and should NOT be enabled for direct
IP-to-IP calling.
Dial Plan Prefix Adds specified prefix to dialed number.
Dial Plan Dial Plan Rules:
1. Accept 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;
•
the high requirement.
a. xx+ - at least 2-digit number;
b. xx – exactly 2-digit number;
c. ^ - exclude;
d. . – wildcard, matches one or more characters
e. [3-5] – any digit of 3, 4, or 5;
[147] – any digit 1, 4, or 7;
f.
g. <2=011> - replace digit 2 with 011 when dialing
h. <=1> - add a leading 1 to all numbers dialed, vice versa will
remove a 1 from the number dialed
| - or
i.
Example 1: {[369]11 | 1617xxxxxxx} –
Allow 311, 611, 911, and any 10-digit
numbers of leading digits 1617
DP752/DP730/DP722 Administration Guide
Version 1.0.11.4
P a g e | 55