They mostly go to call centers, but can be configured to alert a relitive via cell...
''Fall detectors use specialized technology to measure your movements and the position of your body. These devices can tell the difference between everyday movements and emergencies. For example, the device can tell if you are just laying down or if there is a sudden change in direction as a result of a fall.
Many fall detectors use accelerometers and gyroscopes to measure the changes in direction or acceleration of your movement. These monitoring tools use careful calculations that enable a sensor to tell the difference between a fall and other movements.
Another feature included with this technology is movement-monitoring, which monitors your movement up to 30 seconds after an abrupt change in direction. If after 30 seconds the device does not detect movement, it will alert help. This 30-second window reduces the occurrence of false alerts. For example, without this monitoring, the device may alert help every time you drop it or bang it against the counter while doing dishes''
http://www.toptenreviews.com/health/senior-care/best-fall-detection-sensors/
ie, ''When you purchase ATS, you buy the equipment upfront and program the device, which connects through your landline, to call designated numbers. This is a good option if you have friends and family members that live close to you and could respond quickly and reliably to your emergencies''
http://whatis.techtarget.com/definition/server
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