Cisco Cisco Expressway

Appendix 1: Design examples

Call Policy design examples

This section provides some flowchart examples of how a policy service could implement policy rules.

The examples refer to types of CPL such as “Allow CPL” or “Reject CPL” that would be returned by the policy
service (see

for examples of the actual CPL that could be

returned).

Using a policy service to allow or deny calls

Destination alias whitelist

In this example the network administrator wants to allow only calls to approved destination aliases.

External Policy on Cisco Expressway Deployment Guide (X8.2)

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Appendix 1: Design examples