Grandstream Networks DP720 Administration Manual page 40

Call Settings
Sends an early INVITE each time a key is pressed when a user dials a number. Otherwise,
Early Dial
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.
2.
•
•
3.
Example of a simple dial plan used in a Home/Office in the US:
{ ^1900x. | <=1617>[2-9]xxxxxx | 1[2-9]xx[2-9]xxxxxx | 011[2-9]x. | [3469]11 }
Explanation of example rule (reading from left to right):
Accept Digits: +,1,2,3,4,5,6,7,8,9,0 , *, #, A,a,B,b,C,c,D,d
Grammar: x - any digit from 0-9;
a. xx+ - at least 2 digits number;
xx – exactly 2 digits number;
b.
c. ^ - exclude;
. – wildcard, matches one or more characters
d.
e. [3-5] - any digit of 3, 4, or 5;
f. [147] - any digit 1, 4, or 7;
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
i. | - or
Example 1: {[369]11 | 1617xxxxxxx} –
Allow 311, 611, 911, and any 10 digit numbers of leading digits 1617
Example 2: {^1900x+ | <=1617>xxxxxxx} –
Block any number with leading digits 1900 and add prefix 1617 for
any dialed 7 digit numbers
• Example 3: {1xxx[2-9]xxxxxx | <2=011>x+} –
Allow any length of number with leading digit 2 and 10 digit-numbers
of leading digit 1 and leading exchange number between 2 and 9; If
leading digit is 2, replace leading digit 2 with 011 before dialing.
Default: Outgoing - {x+}
DP750/DP720 Administration Guide
P a g e | 40