A route plan consists of one or more trunks and it controls how CenturyLink delivers calls to those trunks (known as inbound traffic).
You control your outbound traffic by how your configuration and equipment points to our trunks. To manage your outbound traffic, create new plans for one or more of your enterprise trunks. You can also add descriptions to your route plans to make it easier to differentiate them.
To create a route plan for SIP trunk service: