Trunk Group Routing to set up an outbound routing table for the trunk groups you assigned in Program 14-05. When a user dial 9, the system routes their calls in the order (priority) specified. For example, if a user dials 9 and all calls in the first group are busy, the system may route the call to another group. Trunk Access Map programming (Programs 14-07) may limit this option. The system contains 25 routing tables for trunk access. Each table has four priority orders for trunk access. There are 25 available Trunk Group Numbers.