Paging Systems

Paging systems are communication systems that send brief messages to a subscriber. Depending on the type of service, the message may be numeric message, an alpha numeric message or a voice message. Paging systems are typically used to notify a subscriber of the need to call a particular telephone number or travel to a known location to receive further instructions. In modern paging systems, news headlines, stock quotations and faxes may be sent. A message is sent to a paging subscriber via paging system access number with a telephone keypad or modem. The issued message is called page. The paging transmits page throughout the service area using base stations which broadcast the page on a radio center.

Paging systems vary widely in their complexity and coverage area. While simple paging systems may cover a limited range of 2 to 5 kilometers or may even be confined to individual buildings, wide area paging systems can provide worldwide coverage. Though paging receivers are simple and inexpensive, the transmission system required is quite sophisticated. Wide area paging systems consist of a network of telephone lines and many base station transmitters, large radio towers that simultaneously broadcast a page from each base station. Simulcast transmitters may be located within the same service area or in in different cities or countries. Paging systems are designed to provide reliable communication to subscribers wherever they are; whether inside a building, driving on a highway, or flying in airplane.