Abstract: A remote telemetry unit (RTU) for use in an automated telemetry paging system for providing remote pager notification of changes in selected operating parameters measured at a specific site location. The selected parameters and the unacceptable changes therein are provided in the form of a plurality of electrical status signals each representative of one of the selected parameters. The RTU includes a programmed microprocessor, including data input/output circuits, a memory circuit, a central processing unit (CPU) and a real time clock. The RTU also includes a status signal receiving circuit for receiving and electronically isolating and digitally shaping the received status signals. An interrogation circuit controlled by the CPU scans the digital status signals, and a discrimination circuit controlled by the CPU reads the digital status signals and determines if a valid deviated or changed status signal is present.

Abstract: A microprocessor controlled integrated alarm and touch tone telephone system which allows the alarm system to be accessed, programmed, and reported upon through a touch tone telephone, either locally or remotely. Under most circumstances, the telephones on the premises can be operated in a normal manner. However, the alarm system selectively monitors the telephone activities for coded touch tone instructions specifically for the alarm system, and responds thereto by issuing synthesized voice reports on the status of the alarm system. A touch tone decoder circuit decodes dialed touch tones, such that the telephone can be utilized similar to a normal keyboard panel to access and control the alarm system. An internal power supply is provided for the telephone for supplying electrical power thereto independently of the outside telephone lines which normally supply power, in the event the outside telephone lines are inoperative.

Abstract: A supervisory monitoring and control system is described which provides for responding to a push-button telephone output from another location for changing operating parameters at the supervised site. In response to the received keyed telephone signal the system provides complete status of monitor and control ports plus any active alarms which have occurred. The foregoing information can be communicated by means of a voice synthesizer or supplied to a printer or the like.

Abstract: A portable, self-contained device for monitoring an area and reporting conditions automatically over standard telephone lines is disclosed. The device communicates through a modem in digital code with digital terminals or in synthetic speech when a digital terminal is not used.

Abstract: An emergency warning device comprises an alarm signal circuitry incorporated in the telephone lines of various telephone systems such as an existing party-line telephone system, or interphone system and it is adapted to issue an alarm call in case of emergency. The control circuitry provides a warning message of a state of emergency affairs that can be given to a user by a party-line telephone or the like in case of emergency.

Abstract: A robbery-repelling alarm system includes a shouting alarm which will produce a human warning speech prerecorded in a first cassette tape for efficiently repelling intruders; a car lock which will be actuated by intruder to ground the current of the engine ignition coil to prevent the car starting; and a telephone dialing alarm including both a pulse dialer and a prerecorded message alarm operated by a second cassette tape for easier operation and minor cost.