I am replacing a customer's current Asterix system with a UC500. The Asterix system has a page all function which, when pressed, will activate speakerphones on all phones AND trigger their PA system (which is connected with a Linksys PAP2T) for a true global page. On the UC500, I can configure this to work with all IP phones (via paging-dn) OR just the PA system (by dialing the extension of the FXS port). The paging group on the UC500 will not allow me to include the FXS-connected PA system.
I really need to deliver this functionality and am willing to purchase any ATAs I might need.
Can someone please provide advice on how to accomplish a paging feature that will activate all phones AND the FXS-connected PA system?