Electronic monitoring system particularly useful as an electronic babysitter

摘要

An electronic monitoring system particularly useful as a telephone babysitter comprises a monitoring unit connectable to the telephone line at the location to be monitored, and a portable sound-producing unit for actuating the monitoring unit from a remote telephone handset via the telephone line. The monitoring unit at the monitored location includes a microphone, a code detector detecting a predetermined code transmitted by the portable sound-producing unit, a keyboard for storing the telephone number of a selected remote telephone handset, a sound level comparator, automatic dialling means, and a microcomputer including a plurality of settable flags controlling the monitoring unit according to preprogrammed routines and in response to the transmission of preselected codes by the portable sound-producing unit. Thus, one code connects the remote telephone handset to the microphone of the monitoring unit, and another code causes the monitoring unit to automatically dial the number of the stored telephone handset number when the sound level at the location of the monitoring unit exceeds a threshold value predetermined number of times during a predetermined time period.