Which pattern type is used to normalize dialed numbers before routing?

• A. Line Group
• B. Route List
• C. Translation Pattern
• D. Route Pattern

Answer: (C)

Dialed-number normalization is done with translation patterns. These patterns examine the digits a user dials and rewrite them into a form that the routing logic can understand and use. By matching a dialed string and replacing it with another sequence (for example, stripping a prefix, adding an area code, or converting an extension to a full E.164 number), translation patterns ensure the number fits the format expected by the Route Patterns that actually determine where the call goes. Once the number has been normalized, the system can reliably match it to a Route Pattern and route it over the correct trunk or to the proper destination.

Line Group, Route Pattern, and Route List don’t perform digit normalization themselves; they are about grouping lines, defining destinations, or organizing routing paths once a properly formatted number is determined.