Grandstream Networks GRP261 Series Administration Manual page 35

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. Default setting is "{ x+ | +x+ | *x+ | *xx*x+ }".
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;
● Grammar: x – any digit from 0-9;
● Grammar: X – any character from 0-9, a-z, A-Z.
● xx+ – at least 2-digit numbers
● xx – only 2-digit numbers
● ^ – exclude
● [3-5] – any digit of 3, 4, or 5
● [147] – any digit of 1, 4, or 7
● <2=011> – replace digit 2 with 011 when dialing
● | – the OR operand
● , – second dial tone. For example: {0,x+} will play second dial tone after
dialing 0 and all digits will be sent including 0
● {X123} — match Z123, e123, 5123, ...
● Flag T when adding a "T" at the end of the dial plan, the phone will wait for
3 seconds before dialing out. This gives users more flexibility on their dial
plan setup. E.g. with dial plan 1XXT, phone will wait for 3 seconds to let
user dial more than just 3 digits if needed. Originally the phone will dial out
immediately after dialing the third digit.
● Back slash "" — can be used to escape specific letters. E.g. if { park+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 11 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
dialing7 numbers and 1617 area code will be added automatically;
● 1[2-9]xx[2-9]xxxxxx |- allows dialing to any US/Canada Number with 11
digits length;
● 011[2-9]x – allows international calls starting with 011;
● [3469]11 – allows dialing special and emergency numbers 311, 411, 611
and 911.
Note: In some cases, where the user wishes to dial strings such as *123 to
activate voice mail or other applications provided by their service provider, the
* should be predefined inside the dial plan feature.
An example dial plan will be: { *x+ } which allows the user to dial * followed by
any length of numbers.