Route Lists
A route list is a prioritized list of eligible paths (route groups) for an outbound call. Typically, a route list is associated with a remote location, and multiple route patterns may point to it. A typical use of a route list is to specify two paths for a remote destination, where the first-choice path is across the IP WAN and the second-choice path is through the local PSTN gateways.
Route lists have the following characteristics:
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Multiple route patterns may point to the same route list.
•A route list is a prioritized list of route groups that function as alternate paths to a given destination. For example, you can use a route list to provide least-cost routing, where the primary route group in the list offers a lower cost per call and the secondary route group is used only if the primary is unavailable due to an "all trunks busy" condition or insufficient IP WAN resources.
•Each route group in the route list can have its own digit manipulation. For example, if the route pattern is 9.@ and a user dials 9 1 408 555 4000, the IP WAN route group can strip off the 9 1 while the PSTN route group may strip off just the 9.
•Multiple route lists can contain the same route group. The digit manipulation for the route group is associated with the specific route list that points to the route group.
•If you are performing several digit manipulations in a route pattern or a route group, the order in which the transformations are performed can impact the resulting E.164 address. Cisco Unified CallManager performs the following major types of digit manipulations in the order indicated:
1. Discarding digits
2. Called party transformations
3. Prefixing digits
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