In telecommunications, the coverage is the geographic area that the station in question covers. Broadcasters and telecommunications companies frequently produce coverage maps to indicate to users the station's intended service area.
Coverage noticer
A coverage noticer is a device that beeps (or vibrates) when in a certain zone there is no coverage. This is fundamental for critical services (security, emergency and so on). When the user goes to a covered area, the noticer ceases beeping. It can be integrated in a mobile phone also.
