An administrator configures international calling on a Cisco UCM cluster and wants to minimize the number of route patterns that are needed. Which route pattern enables the administrator to match…

The '@' symbol is primarily used in SIP dial plans for domain routing or as part of a URI, not as a wildcard for matching variable-length digits in a numerical route pattern.

The '#' character is typically used as a call terminator or as part of special feature codes, not as a wildcard for matching a variable number of digits.

The '*' character is commonly used to match zero or more digits, or as part of feature codes, but '!' is the specific wildcard designed to match one or more digits for variable-length dialing requirements like international numbers.

In Cisco UCM route patterns, the '!' (exclamation mark) wildcard character matches one or more digits of any value, making it ideal for configuring a single route pattern like '9.011!' to cover all international numbers that vary in length after the international access code.