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Data transmission system and equipment

  • US 5,500,854 A
  • Filed: 12/22/1993
  • Issued: 03/19/1996
  • Est. Priority Date: 12/23/1992
  • Status: Expired due to Fees
First Claim
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1. A data transmission system in which the physical location of a data terminal means connected to the system can be identified, said system comprising:

  • a data transmission network (13) having a plurality of data communication connection points (18) for transmitting and/or receiving data, each of said connection points being located at a physical location served by said data transmission network;

    at least one data terminal means (16) connectable to the data transmission network at a selected one of said connection points (18) for receiving and/or transmitting to or from the network; and

    means for providing, to the data transmission network, an identification of the physical location of the selected connection point to which the data terminal means is connected, said means comprising a coding element (15) located at said selected connection point, said coding element being non-integral with said connection point, said coding element having contained therein an encoded address identifying the physical location of the selected connection point, said coding element being connectable to said data terminal means when said data terminal means is connected to said selected connection point for supplying said encoded address to said data terminal means for provision to the data transmission network as the identification of the physical location of the selected connection point to which the data terminal means is connected, said coding element being non-integral with said connection point when said data terminal means is disconnected from said selected connection point.

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