You can set up announcements to continuously repeat while callers are connected to the announcement, so that a caller can listen until the system plays the entire announcement. With a barge-in queue, you do not need a separate port for each announcement.

For example, you can set up an Automatic Wakeup announcement to repeat, and use a barge-in queue. When guests pick up the telephone to hear an announcement at a particular time, they use only one port. The message repeats on that port until the last guest goes off-hook and the message ends.