Manual

Expressway-C

This example shows how to configure the Expressway-C to stop calls coming in via the gateway from being

able to route calls back out of the gateway. This is done by loading some specially constructed CPL onto the

Expressway-C and configuring its Call policy mode to use Local CPL.

Creating a CPL file

The CPL file to be uploaded onto the Expressway can be created in a text editor.

Here are 2 example sets of CPL. In these examples the “GatewayZone” is the neighbour zone to the ISDN

gateway:

This example CPL excludes any checking of whether the calling party is authenticated or not:

<?xml version="1.0" encoding="UTF-8" ?>

<cpl xmlns="urn:ietf:params:xml:ns:cpl"

xmlns:taa="http://www.tandberg.net/cpl-extensions"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="urn:ietf:params:xml:ns:cpl cpl.xsd">

<taa:routed>

<taa:rule-switch>

<taa:rule originating-zone="GatewayZone" destination="9.*">

</taa:rule>

<taa:rule origin=".*" destination=".*">

</taa:rule>

</taa:rule-switch>

</taa:routed>

</cpl>

This example CPL also ensures that the calling party is authenticated:

<?xml version="1.0" encoding="UTF-8" ?>

<cpl xmlns="urn:ietf:params:xml:ns:cpl"

xmlns:taa="http://www.tandberg.net/cpl-extensions"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="urn:ietf:params:xml:ns:cpl cpl.xsd">

<taa:routed>

<taa:rule-switch>

<taa:rule authenticated-origin="" destination="9.*">

</taa:rule>

<taa:rule originating-zone="GatewayZone" destination="9.*">

</taa:rule>

Cisco Expressway Basic Configuration Deployment Guide (X8.5.2) Page 34 of 57

Optional configuration tasks