Implementing Cisco Advanced Call Control and Mobility Services (CLACCM) — Question 181

An engineer configures several calling party transformation patterns in Cisco UCM so that calling numbers are shown in the +E.164 format. The route patterns match seven-digit internal numbers and prefix the numbers with 1408. The SIP trunk matches 1408XXXXXXX and prefixes the number with +. When users make outbound calls, the calling number still shows as seven digits. What is the cause of this problem?

Answer options

• A. The calling transformation on the SIP trunk is applied first, and then the calling transformation on the route patterns is applied.
• B. Calling transformations cannot be configured on both route patterns and a SIP trunk.
• C. The calling transformation on the route patterns is ignored because there is already a calling transformation on the SIP trunk.
• D. The engineer must also apply a calling transformation at the route group details level.

Correct answer: C

Explanation

The correct answer is C because the calling transformation on the route patterns is ignored when there is already a transformation applied on the SIP trunk. Options A and B are incorrect since both transformations can exist, and the order of application is not the primary issue. Option D is also incorrect as the problem specifically relates to the existing transformation on the SIP trunk overriding the route pattern.