Patent ID: 6175307
Filing Date: 2001-01-16
Classification: G08B

Abstract:
A security system for monitoring a space and reporting unauthorized entry, said security system comprising a control panel and a combination keypad and door sensor, said control panel including an arrangement connected to a telephone system for originating, a telephone communication with a monitoring station, said control panel including a microphone, a signal processing arrangement for the signal from said microphone, a microprocessor and a sound generating arrangement,said combination keypad and door sensor comprising a plurality of keys for entering codes into said keypad for arming and disarming of said system, a microphone, signal processing means for the signal of said microphone, a microprocessor and a sound generating arrangement,said control panel and said combination keypad and sensor using said sound generators and said microphones to form a high frequency free air broadcast communication link therebetween, said sound generator of said combination keypad and sensor producing as part of said communication link a communication signal in a high frequency and producing an audible signal portion for the user indicating a requirement to enter information via said keypad which information is communicated to said control panel by said combination key pad door sensor through said communication signal, whereby said control panel and said combination keypad and sensor interact to allow a user to arm and disarm the system at said combination keypad and sensor and have said instructions communicated to said control panel by the two-way free air broadcast communication signal therebetween.