Enter your credentials.
Click on the "Applications" tab, then select "Queues" from the drop-down menu.
Click on the "+ Add Queue" button.
Switch over to the "Queue Agents" tab.
Switch over to the "Timing & Agent Options" tab.
Switch over to the "Capacity Options" tab.
Switch over to the "Caller Announcements" tab.
Click on "Submit" when you are finished.
After that, select "Apply Config" to reload FreePBX and finalize your changes.