1978-07-19
1980-11-04
Tupper, Robert S.
179 84C, H04M 338
Patent
active
042321956
ABSTRACT:
Responder apparatus enables a telephone subscriber to obtain a status report of the conditions at his premises by placing a telephone call thereto from a remote location. The subscriber dials his telephone number and permits his telephone subset to ring an abnormally large number of times n. The responder apparatus, which is installed at the premises, counts the rings and, upon the nth ring, creates a temporary off-hook condition on the subscriber's line. During the off-hook period, a status reporting unit sends signals over the line to the calling subscriber which are indicative of the conditions at the premises. The signals, which are generated under the control of various sensors at the premises and which may be in the form of coded tones, may indicate that the temperature of the premises is or is not normal, that intrusion has or has not taken place, and numerous other such conditions. Upon receipt of additional telephone calls from the subscriber within specified periods of time, the responder apparatus may also be used to initiate various control functions at the premises. These control functions may include turning lights, appliances or other devices on or off, changing a thermostat setting, and numerous other such functions
REFERENCES:
patent: 3324245 (1967-06-01), Stenhammar
patent: 3702904 (1972-11-01), Bard
patent: 4006316 (1977-02-01), Bolgiano
patent: 4016360 (1977-04-01), Cane
patent: 4085292 (1978-04-01), Leslar et al.
Popek Joseph A.
Tupper Robert S.
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