210-065 Question #265: Real Exam Question with Answer & Explanation

The correct answer is D: Implement a CPL on the Cisco VCS Expressway.. Implementing a CPL script on the Cisco VCS Expressway is the recommended method to block unwanted calls from routing to the ISDN gateway, as it intercepts and filters calls at the external-facing edge.

Question

Your customer reports that they have had unwanted calls routing from their Cisco VCS Expressway to their ISDN gateway. Which way is recommended to prevent these calls?

Options

AConfigure a Registration Deny List on the Cisco VCS Expressway.
BConfigure a Registration Allow List on the Cisco VCS Expressway.
CImplement a CPL on the Cisco VCS Control.
DImplement a CPL on the Cisco VCS Expressway.

Explanation

Implementing a CPL script on the Cisco VCS Expressway is the recommended method to block unwanted calls from routing to the ISDN gateway, as it intercepts and filters calls at the external-facing edge.

Common mistakes.

A. A Registration Deny List controls which endpoints are permitted to register with VCS and has no effect on outbound call routing toward an ISDN gateway.
B. A Registration Allow List restricts device registration eligibility and does not provide call routing control or the ability to block calls to specific destinations.
C. A CPL on the VCS Control applies rules to internally routed calls, but because the unwanted calls are already entering via the Expressway, the policy must be enforced at the Expressway to be effective.

Concept tested. CPL policy on VCS Expressway to block unwanted call routing

Reference. https://www.cisco.com/c/en/us/td/docs/telepresence/infrastructure/vcs/config_guide/X8-9/Cisco-VCS-Administrator-Guide-X8-9.html

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