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DATA COMMUNICATION SYSTEM SUITED FOR TRANSMITTING AND RECEIVING DATA AMONG A PLURALITY OF DATA COMMUNICATION APPARATUSES CONNECTED TO A NETWORK, DATA TRANSMISSION APPARATUS CONSTITUTING SUCH SYSTEM, AND TRANSMISSION DESTINATION UPDATE METHOD AND TRANSMISSION DESTINATION UPDATE PROGRAM EXECUTED BY SUCH DATA TRANSMISSION APPARATUS

  • US 20090187665A1
  • Filed: 12/22/2008
  • Published: 07/23/2009
  • Est. Priority Date: 01/21/2008
  • Status: Abandoned Application
First Claim
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1. A data communication system in which a plurality of data communication apparatuses are connected in a manner enabling communication, each of said plurality of data communication apparatuses comprising:

  • a communication portion capable of communicating in multiple types of communication methods; and

    a user storage portion for associating and storing user identification information of a user, a communication method, and destination information for each said user;

    among said plurality of data communication apparatuses, a data transmission apparatus includesa destination designation portion for accepting designation of user identification information stored in said user storage portion,a data accepting portion for accepting data,a data transmission portion for controlling said communication portion to transmit said data accepted, based on a communication method and destination information stored in association with said user identification information accepted,a comparing portion for comparing the communication method stored in association with user identification information included in reply data with a communication method by which said communication portion receives said reply data when said communication portion receives said reply data for said data transmitted, andan update portion for updating the communication method and the destination information stored in association with the user identification information included in said reply data with the communication method by which said communication portion received said reply data and with the destination information included in said reply data if the communication method stored in association with the user identification information included in said reply data and the communication method by which said communication portion received said reply data do not match as a result of a comparison by said comparing portion.

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