Rotate Music On Hold
Add a property like below from the PBX > [Options] > [Advanced].
tenant.template.common._config.2016=prompt.hold,Prompt for music on hold,text,maxlength:64,
Now you have the [Prompt for music on hold] field at the Tenant > Options page.
If you set like below,
When you put on hold, the prompt hold1 will be played. Next time, hold2 will be played and it will be rotated.
If you put on hold multiple times in a one session, it will be rotated as well.