You may think that you can use the medical alarm system installed in your residence in only medical emergencies facing dangers to your health or to any of the family members. It is not a fact. You can use the alarm button even before the paramedics are required. The providers will always encourage you to use the button before anything goes wrong.
Ordinarily the medical alarms are multipurpose. For example, they could be effective when some stranger knocks at your door and there are chances of theft or burglary. But in your case the objective is specific. You require the system for health emergencies and the use should be accordingly designed.
Very often the providers use a remote answering system with the medical alert systems so that the response is instant and there is no delay on any count. After all, delay in response may cause serious problems and even could be fatal for the person who is ailing.
A unique feature with some of the medical alert gadgets is the fall prevention feature. Suppose you are a patient and sitting on your chair or lying on the bed with no one nearby. The phone rings but you are in no position to lift the receiver. There is a system in the gadget which allows you to press the button and listen and answer to such phone calls. The alerts systems are thus also support system for you.