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Data distribution system for private automatic branch exchange

  • US 4,286,118 A
  • Filed: 07/02/1979
  • Issued: 08/25/1981
  • Est. Priority Date: 07/02/1979
  • Status: Expired due to Term
First Claim
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1. In a private branch telephone exchange including a switching matrix for connecting a plurality of incoming trunk pairs to a plurality of stations, a controller responsive to the state of said switching matrix for storing a plurality of connection signals, each of said plurality of connection signals corresponding to connection of a particular one of said plurality of trunk pairs to a particular one of said plurality of stations, the improvement of:

  • a data distribution system comprising at least one data communication channel connecting said controller to at least two of said plurality of stations;

    address defining means associated with each of said plurality of stations for providing a unique station address for each of said plurality of stations connected to said data communication channel;

    said controller further comprising an addressing means for providing a plurality of addressing signals, one at a time, to said data communication channel, each of said addressing signals being followed in time by one of a plurality of data signals, said plurality of data signals corresponding to one of said plurality of connection signals; and

    a display and control means associated with each of said plurality of stations for causing a display to provide a visible indication corresponding to said one of a plurality of connection signals in response to said plurality of data signals;

    said display and control means comprising an addressable memory connected to said display responsive to a first particular one of said plurality of data signals to load a first address of said addressable memory, and further responsive to subsequent data signals of said plurality of data signals to load sequential addresses of said addressable memory.

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