a university or CCRC Types of devices There are a number of different devices that can be used to trigger an alarm. Pendant worn around the neck Small device worn on the belt Wristband Installed motion detectors in a home Radar based detectors in a room Smart Protect Smart Watch A smart phone Active devices require the user to take some action to trigger an alarm condition; passive systems monitor the user and raise an alarm based on an algorithm - a fall, lack of activity, etc. A weakness of active devices is that the user must be conscious to trigger the alarm. Both passive and active devices require that the user wear the device. Installed systems can be expensive and difficult to deploy. Human brainwaves, or EEG Functionality A medical alarm system may consist of Personal Device a wireless transmitter, which is worn around the neck, on a belt, or on a wrist an application running on a smart phone and carried in a pocket the device may contain a speaker and microphone Sensor(s) fall detection sensors movement sensors door open/close sensors usage sensor on a device such as a microwave oven Communication cellular data access for operation anywhere there is cell phone coverage an in-home base station that is either connected to a regular telephone, or to a WiFi network, an ISDN line, or to a cellular data network. The base station may contain a speaker and microphone Data some systems will transmit the GPS location of the alarming device some systems can be configured to transmit additional personal information when an alarm is triggered (such as age, medical history, etc.) Responders Class-B EMT Operators local 911 service friend(s) or family In addition there are various other types of accessories (emergency buttons, fall sensors, smoke detectors, carbon monoxide detectors, flood detectors, motion detectors) that can be placed around the home and integrated with the base station. Base stations can be connected over analog or digital ISDN connections. In the event of a power failure, these devices can operate on batteries, thus adding an extra degree of safety. In case of emergency the user can set off a call for help by the press of an alert button on a personal device, without needing to reach the telephone. Systems with passive alerts may set off a call for help if no movement has been detected over some period of