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Group emergency call system

  • US 5,166,972 A
  • Filed: 10/26/1989
  • Issued: 11/24/1992
  • Est. Priority Date: 11/15/1988
  • Status: Expired due to Term
First Claim
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1. In a communication system for receiving dialed digit signals from a plurality of subscriber sets connected thereto, a group emergency call system comprised of:

  • (a) means for storing one or more emergency hunt group assignment data tables each containing a predetermined pilot number for defining a predetermined emergency hunt group within said communication system, and a plurality of directory numbers corresponding to respective ones of said subscriber sets assigned to said predetermined emergency hunt group.(b) means for receiving dialed digit signals designating an incoming emergency call from a predetermined one of said subscriber sets and comparing said dialed digit signals with said pilot number, and in the event said dialed digit signals correspond to said predetermined pilot number generating a request device message signal.(c) means for receiving said request device message signal and in response retrieving said directory numbers from a corresponding one of said emergency hunt group assignment tables and in response generating a plurality of ringing signals for simultaneously ringing said respective ones of said subscriber sets assigned to said emergency hunt group, whereby embers of said emergency hunt group are alerted to said incoming emergency call, and(d) means for establishing communication paths in the form of bidirectional conference channels between said predetermined one of said subscriber sets and said respective ones of said subscriber sets.

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