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Digital dialers for use in the security field

  • US 4,137,429 A
  • Filed: 06/29/1977
  • Issued: 01/30/1979
  • Est. Priority Date: 06/29/1977
  • Status: Expired due to Term
First Claim
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1. A telephone dialer apparatus of the type adapted to access a telephone line to transmit a dialing code via said line indicative of the location of a remote central station and to supply said station upon accessing of the same with a subscriber code address manifesting the location and condition of an alarm emanating from a monitored zone under surveillance, said zone including a plurality of alarm detectors, each capable of responding to a different alarm situation, comprising:

  • (a) a programmable accessible memory having a plurality of storage locations, with a first group of said locations storing a code indicative of the location of said remote central station, a second group of storage locations having stored therein a code indicative of the subscriber address code associated with said monitored zone, and a third group of storage locations having stored therein a plurality of codes, each indicative of a particular alarm condition present at said monitored zone, according to said detectors,(b) first means coupled to said memory to cause said memory to first provide an output a first code associated with said first group of locations manifesting the location of said remote central station and means responsive to said code to provide a dialing format to said telephone line for accessing said central station,(c) logic means coupled to said memory and responsive to said first code being provided to cause said memory to provide a second code associated with said second group of locations for transmission to said remote station of a signal indicative of the address of said monitored zone, and(d) means coupled to said memory and responsive to the transmission of said address signal to cause said memory to provide a third code associated with said third locations for transmission to said remote station an alarm signal indicative of the particular type of alarm situation emanating from said monitored location.

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