g) | - the OR operand
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 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;
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.
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