Skype for Business as Paging System

I am not sure of any specific software based solution, but if you are just using it for paging, maybe cisco call manager express running on a router will give you what you need?  Look at Skype Connect

Bryant, I don't think I am looking for the system as Cisco Call Manager. Skype for Business or Paging system that works with Skype for Business.
Thanks

I am actually helping a global customer with a SfB rollout as a full voice solution. For the sites that they have paging, they have an AudioCodes analog gateway installed. Essentially this is just an analog gateway that ties into Skype. I'm not on the configuration side of things for this project so I can't give you much on details for how to configure this; I'm on the side the provides surveys and figures out what is needed for a site to migrate.
Anyway, as long as the site has a paging system with an analog input, we are able to use that. There is no "page" function that I'm aware of in Skype, but in this setup each site would have instructions on what phone number to call, which in turn opens up the analog phone line on the AudioCodes gateway, and they are able to page from there. Depending on the building, the paging system could be just full building paging, zone paging, or even pre-recorded messages.
The only alternate to that, is the physical phones. Polycom phones (at least the VVX series) has it's own method of paging among the phones themselves. This paging has nothing to do with Skype directly; it's just a multicast channel that the phones can open up/listen to for paging purposes.