Below are the following destination-pattern operators that can be used in IOS dial-peers for voice:
Standard Operators
- Asterisk (*) and pound sign (#)—Keys that appear on standard touchtone dial pads.
- Brackets ([ ])—Range of digits. Digits (0 to 9) are enclosed in brackets. Similar to a regular expression rule.
- Parentheses (( ))—Define specific pattern. Same as the regular expression rule—for example, 408(555). Use parentheses in conjunction with symbols ? or %.
- Period (.)—Match to any entered digit (used as a wildcard).
- Comma (,)—Pause between digits.
“Repeating” Operators
- Percent sign (%)—The previous digit or pattern zero or multiple times, similar to wildcard usage in the regular expression.
- Question mark (?)—The previous digit occurred zero or one time.
Other Operators
- Circumflex (^)—Match to the beginning of the string.
- Dollar sign ($)—Match to the null string at the end of the input string.
- Backslash (\)—Is followed by a single character matching that character or used with a single character having no other significance (matching that character).
- T—Control character indicating that the destination-pattern value is a variable-length dial string.
