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Method for establishing and maintaining communication processing information for a group call

  • US 5,450,405 A
  • Filed: 04/02/1993
  • Issued: 09/12/1995
  • Est. Priority Date: 04/02/1993
  • Status: Expired due to Term
First Claim
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1. In a multi-site communication system that includes a plurality of sites, a central controller, a plurality of communication units that are arranged into communication groups, and a processing multiplexer, wherein the processing multiplexer includes a central controller interface and a destination database, and a plurality of site interfaces, wherein the processing multiplexer is operably coupled to each of the plurality of sites and the central controller, a method for establishing and maintaining communication processing information for a particular communication group call, the method comprises the steps of:

  • a) when the particular communication group call is initiated, formatting, by the central controller, communication processing information, wherein the communication processing information includes source information, destination information, and a set up command;

    b) transferring, by the central controller interface, the communication processing information from the central controller to the plurality of site interfaces;

    c) storing, by at least one of said plurality of site interface, the communication processing information in the destination database;

    d) when a source change occurs, generating, by the central controller, subsequent communication processing information based on the source change, wherein the subsequent communication processing information includes subsequent source information, the destination information and a change source command;

    e) transferring, by the central controller interface, the subsequent communication processing information from the central controller to the destination database; and

    f) overwriting, by at least one of said plurality of site interfaces, portions of the communication processing information, in the destination database, with portions of the subsequent communication processing information that have changed from the communication processing information.

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