"Motion sensor". So the old person falls over, ComCast sees their waving hand as "motion" and just ignores it. Seems bollocks to me. Things like the redbutton which most areas have are good enough. They sub to it monthly and wear their red button. If they fall, just press it and someone comes to check. Or you can have the option where you have to press it every day at least once to say you're OK. If you don't, someone will come round to check you're OK. Works just fine and is simple.