Public voice notification system and paging?

For information and coordination between different departments

in places such as hospitals and health centers, universities

and training centers, factories and warehouses, airports, public places, hotels, entertainment centers, chain stores, etc.

Efficient is needed for pitching and public information

with the aim of giving voice to different parts of a large building or complex (Public Address System). This system can be used to call people, play music and radio, play voice alerts in emergencies, inform and generally facilitate the control and management of places.