I've been tasked at my job to find an intercom/paging system as it is being a requirement that now any and all of the education facility must be equiped with one.
I would like to explore a few options such as implementation with current phone system (s) Merilin and/or Cisco systems as well as a stand alone system, which for some reason I think might be an easy solution.
I've found Bogen 25 and 75 station systems which I believe will fit our need, but these are only main consoles and the rest of the equipment must be purchased as well which includes speakers, amplifiers if need be, obviously cabling, and the switches for locations where the need would be to contact DON's office which would be mostly classrooms.

https://www.bogen-paging.com/products/school-paging-intercom-systems/school-intercoms.aspx

Does anyone have recomendations for brands or type of systems to implement for a small/medium sized privately owned higher education facility?

Thanks