Implementing Cisco Advanced Call Control and Mobility Services (CLACCM) — Question 158

An engineer set up and successfully tested a TEHO solution on the Cisco UCM. PSTN calls are routed correctly using the IP WAN as close to the final PSTN destination as possible. However, suddenly, calls start using the backup local gateway instead. What is causing the issue?

Answer options

• A. route pattern
• B. LAN connectivity
• C. WAN connectivity
• D. route list and route group

Correct answer: C

Explanation

The correct answer is C because if the calls are shifting to the local gateway, it indicates a problem with the WAN connection that prevents proper routing through the IP WAN. Options A, B, and D do not directly address the issue of calls reverting to the local gateway, which signifies a failure in the WAN connectivity.