How does route pattern matching determine the route for a dialed number in CUCM?

• A. CUCM uses the digit length only.
• B. CUCM selects the best match based on digit analysis.
• C. CUCM uses first pattern that matches regardless of digits.
• D. CUCM matches patterns based on time of day.

Answer: (B)

When CUCM decides how to route a dialed number, it analyzes the digits you entered and compares them against every configured route pattern. The system isn’t looking for the first pattern that fits or just using how many digits you dialed; it’s performing digit analysis to find the best fit. Each route pattern defines a template made of fixed digits and wildcards, so CUCM can match the dialed sequence against all patterns and pick the one that aligns most precisely. The deciding factor is the most specific match—the pattern that covers the greatest number of dialed digits. If multiple patterns tie on how many digits they match, other routing rules like partitions or calling search spaces determine the final route.