My requirement create a Page while Page running (Some music) and the someone Page to this extension need system fade out Music and Page after end page system will back play music again.
There are some paging adaptors that allows you to do that.
With Asterisk, I think the most ideal way would be to join the paging device to a Confbridge.
Set that it should play MOH when there’s only 1 participant, and whenever you want to page, call the conference bridge.