When designing the call control on a Cisco Expressway Core, which is the sequence of dial plan functions?
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A. B. C. D.D.
When designing the call control on a Cisco Expressway Core, the sequence of dial plan functions is as follows:
Search Rules: These are used to identify the destination of the call. Search rules are matched against the dialed string to determine the endpoint to which the call should be routed.
Transforms: Once a search rule has identified the destination endpoint, transforms are used to modify the dialed string as needed to match the endpoint's format. Transforms can be used to add or remove digits, change the order of digits, or modify the format of the dialed string in other ways.
Zones: Once the dialed string has been modified by the transforms, the Expressway Core uses zones to determine how to route the call to the destination endpoint. Zones define the network boundaries and determine how calls are routed between different networks.
CPL (Call Processing Language): CPL is a scripting language that can be used to customize the call routing behavior. CPL scripts can be used to apply additional call processing logic beyond what is provided by the built-in dial plan functions.
User Policy: User policy rules can be used to customize call handling behavior for specific users or groups of users. For example, user policy rules can be used to restrict calls to certain destinations or to apply different call handling behavior based on the time of day or other criteria.
Therefore, the correct sequence of dial plan functions when designing the call control on a Cisco Expressway Core is option A: transforms, CPL, user policy, search rules.