Implementing Cisco Advanced Call Control and Mobility Services (CLACCM) — Question 16

How does an engineer globalize routing for ingress calls coming from the PSTN to internal DNs?

Answer options

• A. At the PSTN gateway, put the calling number in PSTN format and the called number in DN format.
• B. At Cisco Unified CM, put the calling number in E.164 format and the called number in PSTN format.
• C. At the PSTN gateway, put the calling number in E.164 format and the called number in localized (DN) format.
• D. At Cisco Unified Communications Manager, put the calling number in E.164 format and the called number in E.164 format.

Correct answer: B

Explanation

The correct answer is B because it specifies that the calling number should be in E.164 format, which is necessary for global dialing, while the called number needs to be in PSTN format for proper routing. The other options either misplace the formats or do not adhere to the required standards for globalized routing, making them incorrect.