Cisco 400-051 Exam

What does a period accomplish when it is used in a SIP Dial Rule pattern that is associated with a Cisco 9971 IP Phone that is registered to Cisco Unified Communications Manager?

  • A. It matches any single digit from 0 to 9.
  • B. It matches one or more digits from 0 to 9.
  • C. It is a delimiter and has no significant dialing impact.
  • D. It matches any single digit from 0 to 9, or the asterisk (*) or pound (#) symbols.
  • E. It matches one or more digits from 0 to 9, or the asterisk (*) or pound (#) symbols.
Answer: Option D.
Explanation: 

Asterisk (*) matches one or more characters. The * gets processed as a wildcard character. You can override this by preceding the * with a backward slash (\) escape sequence, which results in the sequence \*. The phone automatically strips the \, so it does not appear in the outgoing dial string. When * is received as a dial digit, it gets matched by the wildcard characters * and period (.).

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