Other automatic test equipment with reed relays usage are: cable testers, discrete semiconductor testers, power component testers and more. With more than 20,000 switching points, the switching devices must be extremely small. It is not unusual to have up to 30 layers making up the printed circuit boards that will house these switching points, with switches mounted on both sides of the boards. These boards are very expensive, driving up the cost of real estate on the boards. Reed relay manufacturers have been able to meet this challenge by offering very small reed relays in a surface mounted package.