Cisco Paging Server
Cisco Paging Server is designed for applications of any size for customers of Cisco Unified Communications Manager. The InformaCast software application offers essential paging functions through Cisco IP Phones with emergency notification capabilities built-in. The solution provides business-critical corporate communications as well as reliable security awareness for many industries.
More information: http://www.cisco.com/c/en/us/products/unified-communications/paging-server/index.html