Paging
Paging infrastructure sets up a wireless paging network through which users send and receive voice, numeric, and alphanumeric pages. An on-site paging system establishes a private paging service to ensure that personnel can be contacted at all times. These mission-critical systems are not depending on 3rd party infrastructures and therefore can communicate within their region and with nearby hospitals without external phone, radio, cellular, or data services which often fail during natural disasters.