Today calling systems are among the most modern tools that are used by people to inform others of their needs when necessary. These systems have a significant impact on speeding up and systematizing provision of services and attending to different matters. Using them, people can let others know about their requests as fast as possible, without causing any annoyance and forming crowds.

These systems can be used by groups of people in offices for paging each other or paging a specific individual whose current location is unknown, such as a janitor. They can also be employed in restaurants, cafes, dining-rooms, hospitals, clinics, companies, offices, factories, hotels and any other place that requires a calling system.