Expressway-C Dial Plan Configuration

A.

In a Cisco Collaboration environment, Expressway-C is a component that serves as a traversal client for secure communication between the internal and external networks. One of its main functions is to route calls to the appropriate endpoint or application.

To route a call to the Cisco Unified Communications Manager (UCM), a dial plan component called a Search Rule needs to be configured on Expressway-C. A Search Rule is used to match the dialed digits to a particular destination. When a user dials a number, Expressway-C uses the configured search rules to determine where to send the call.

A Search Rule is made up of a regular expression pattern and a destination address. The regular expression pattern matches the dialed digits, and the destination address specifies where the call should be routed. The Search Rule can be configured to route calls to a specific endpoint, such as a Cisco UCM, based on the dialed digits.

Therefore, option D, Search Rule, is the correct answer to this question. Option A, call routing, is a general term that refers to the process of determining how a call should be routed, which involves multiple dial plan components, including Search Rules. Option B, traversal subzone, is a configuration setting that specifies how Expressway-C should communicate with other Expressway components. Option C, call policy, is a set of rules that govern how calls are handled, including how they are routed.