how would i go about recording a message to have it play over the PA everyday at the same time? is that even posible with this system?
The EPI didn't have That Feature.
I do not know if this will help, but below is a link to viking they make all sorts of after market products for paging and auto attendants. I would give time a call.
https://www.vikingelectronics.com/products/view_product.php?pid=164
Almost 20 years ago in the UK I used a unit designed for British rail unmanned stations which you could dial into and leave a message which would then be played back according to a pre-programmed schedule. I used it to get around a feedback issue but it should still be available and may suit your needs. Unfortnately having no furher need of the information for the past 20years I can't remember the name of the product but hopefully this will give you a starting point in your search!