Grandstream Networks GXP2130 Administration Manual page 45

2. Grammar:
x – any digit from 0-9
X – digits from 0-9, and letters from a-z, A-Z.
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
<2=011> - replace digit 2 with 011 when dialing
f)
g) "|" - the OR operand
h) {X123} - match Z123, e123, 5123, ...
Back slash "\" - can be used to escape specific letters. e.g. if
i)
{ \p\a\r\k\+60 } dial plan is configured, park+60 should be able to
pass dial plan check. This also can be used to escape Mark and
User-unreserved characters.
Mark = "-" / "_" / "." / "!" / "~" / "*" / "'" / "(" / ")"
User-unreserved = "&" / "=" / "+" / "$" / "," / ";" / "?" / "/"

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;

Example 3: {1xxx[2-9]xxxxxx | <2=011>x+}
Allows any number with leading digit 1 followed by a 3-digit number, followed
by any number between 2 and 9, followed by any 7-digit number OR Allows
any length of numbers with leading digit 2, replacing the 2 with 011 when
dialed.

Example 4: If we set the dial plan with {\*123}, it should allow input *123
to pass dial plan check.

Example 5: If we set the dial plan with {\$123}, it should allow input $123
to pass dial plan check.

Example 6: If we set the dial plan with {12\_3}, it should allow input 12_3
to pass dial plan check.
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):

^1900x. - prevents dialing any number started with 1900;

<=1617>[2-9]xxxxxx - allows dialing to local area code (617) numbers by
dialing 7 numbers and 1617 area code will be added automatically;
GXP21XX Administration Guide
P a g e | 44