Route List
A route list is used to route a call. It is configured to map the routes of a call to
one or more route groups, which basically act as trunk groups.The route list will
then forward the call to the route group based on some predefined preferences.
For example, the main (primary) route group may be configured to route calls
based on cost and metrics, whereas the secondary route may be configured to
only be used in instances where the primary circuit is unavailable, like in an alltrunks-
busy condition when there isn’t enough bandwidth to admit or complete
a call.