Using the default ARS settings, despite having several short codes in the ARS form, all outgoing calls are actually routed the same way using the same trunks. However, by having separate short codes for different call types present, it is easy to change the routing of each call type if required.

For this example, the customer has separate sets of lines for local calls and for national/international calls. These have been configured as follows:

The default ARS can be configured to match this by just changing the Line Group ID settings of the default ARS short codes to match.