Coaster pager system is mainly used in fast food restaurant, self-service reataurant, hospital, office and so on where there are a lot of customers waiting for his or her service.
When the callers are ready for offering service, they just press the number on the keypad to send an ID to the pager.
And the people hold the pager will know the information that the dishes or the service are ready to be offered and take it at earlier time.
When the customer places an order, he(she) will be given one pager receiver with a number, when the order is ready,the waiter press the keypad number to call the pager, then customer will get the information by the buzzer/vibration/LED indications of the pager.