Cisco Cisco Expressway Maintenance Manual
About Call Policy
You can set up rules to control which calls are allowed, which calls are rejected, and which calls are to be
redirected to a different destination. These rules are known as Call Policy (or Administrator Policy).
redirected to a different destination. These rules are known as Call Policy (or Administrator Policy).
If Call Policy is enabled and has been configured, each time a call is made the Expressway will execute the
policy in order to decide, based on the source and destination of the call, whether to:
policy in order to decide, based on the source and destination of the call, whether to:
n
proxy the call to its original destination
n
redirect the call to a different destination or set of destinations
n
reject the call
Note: when enabled, Call Policy is executed for all calls going through the Expressway.
You should use Call Policy to determine which callers can make or receive calls via the Expressway.
Configuring Call Policy
The
Call Policy configuration
page (
Configuration > Call Policy> Configuration
) is used to configure
Call Policy mode
The Call Policy mode controls from where the Expressway obtains its Call Policy configuration. The
options are:
options are:
n
Local CPL: uses locally-defined Call Policy.
n
Policy service: uses an external policy service.
n
Off: Call Policy is not in use.
Each of these options are described in more detail below:
Local CPL
The Local CPL option uses the Call Policy that is configured locally on the Expressway. If you choose Local
CPL you must then either:
CPL you must then either:
n
Call Policy rules
page (
Configuration > Call Policy > Rules
) —
note that this only lets you allow or reject specified calls, or
n
you are recommended to use an external policy service instead
Only one of these two methods can be used at any one time to specify Call Policy. If a CPL script has been
uploaded, this takes precedence and you will not be able to use the
uploaded, this takes precedence and you will not be able to use the
Call Policy rules
page; to use the page
you must first delete the CPL script that has been uploaded.
If Local CPL is enabled but no policy is configured or uploaded, then a default policy is applied that allows all
calls, regardless of source or destination.
calls, regardless of source or destination.
The Policy service option is used if you want to refer all Call Policy decisions out to an external service. If
you select this option an extra set of configuration fields appear so that you can specify the connection
details of the external service. See
you select this option an extra set of configuration fields appear so that you can specify the connection
details of the external service. See
.
Cisco Expressway Administrator Guide (X8.2)
Page 154 of 378
Dial plan and call processing
About Call Policy