Two queues are associated with CAS calls. One queue is at the main office, and the other queue is at the branch. If idle RLTs are available from the branch to the main location, RLTs are seized. CAS calls are then queued at the main location, along with other attendant-seeking calls. If all RLTs are in use, CAS calls to the attendant are queued at the branch in an RLT queue. The length of the queue can vary from 1 to 100 calls. You set the length of the queue when you administer the RLT group.