×

System for providing secure telecommunication access to a computer

  • US 4,922,521 A
  • Filed: 03/08/1989
  • Issued: 05/01/1990
  • Est. Priority Date: 09/05/1986
  • Status: Expired due to Fees
First Claim
Patent Images

1. A telecommunication exchange for controlling the interconnection of an external computer connected thereto to any of a plurality of terminals also connected thereto over telephone lines, interconnection of the computer with a terminal requesting access thereto only being established if such terminals transmits an authorized identification code and has an address in accordance with a predetermined list of authorized identification codes and authorized terminal addresses corresponding thereto;

  • such exchange comprising;

    a control processor which includes a receive memory for storing the identification code transmitted by a requesting terminal and an authorization memory for storing said list of authorized identification codes and authorized terminal addresses corresponding thereto;

    said control processor being programmed to compare whether the identification code received from a requesting terminal and stored in the receive memory matches an authorized identification code stored in the authorization memory, and if there is such a match to identify the authorized terminal address corresponding to such authorized identification code;

    a switching network controlled by said control processor to selectively interconnect any of the terminals connected to said exchange with said computer and to selectively transmit confirm signals and ringing signals to any of such terminals, a confirm signal signifying to a user of a terminal to release its line and a ringing signal signifying to a user of a terminal to engage its line;

    said control processor being further programmed to carry out a security procedure such that upon determining that a requesting terminal has an authorized identification code said control processor causes said switching network to(i) transmit a conform signal to the requesting terminal,(ii) after the calling terminal line has been released, transmit a ringing signal to the authorized terminal address corresponding to said authorized identification code, and(iii) after the terminal at the authorized address has engaged its line, interconnect such terminal with said computer.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×