Which call routing pattern is used for phone numbers that are in the E.164 format?
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A. B. C. D.D.
https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/srnd/collab12/collab12/dialplan.html#pgfId-1591747The correct answer is A. +.! Route Pattern.
In Cisco Unified Communications Manager (CUCM), E.164 is the globally recognized numbering plan for Public Switched Telephone Network (PSTN) and other telecommunication networks. E.164 is a standard that defines the format of phone numbers that includes the country code, area code, and local number.
To route calls to phone numbers in the E.164 format, CUCM uses a +.! Route Pattern. This route pattern consists of the following components:
+ : The backslash () followed by a plus sign (+) is an escape character used to match the plus sign literally.
. : The dot (.) is a wildcard character that matches any single digit (0-9).
! : The exclamation mark (!) is a wildcard character that matches one or more digits (0-9).
The combination of these three characters in the +.! Route Pattern allows CUCM to match any phone number in the E.164 format, regardless of the country code, area code, or local number.
Translation Pattern (option B) is used to modify or translate the dialed number before it is routed, and is not typically used for E.164 numbers.
Option C is incorrect because it uses forward slashes (/) instead of backslashes () and will not work for matching E.164 numbers.
Option D is incorrect because it refers to a Called Party Transformation Pattern, which is used to modify the destination number after it has been matched by a route pattern. This option also includes a specific North American Numbering Plan (NANP) pattern, which is not applicable to E.164 numbers in other parts of the world.