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Telephone technician's terminals

  • US 4,837,811 A
  • Filed: 01/25/1988
  • Issued: 06/06/1989
  • Est. Priority Date: 01/25/1988
  • Status: Expired due to Term
First Claim
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1. A portable craftman'"'"'s terminal for communicating with a central access network of a telephone operating system, comprising:

  • means for connecting the terminal in communication with the central access network;

    means actuatable to transmit a code signal to the central access network to initiate downloading of ASCII coded data from the central access network;

    a central processing unit including a random access memory and erasable programmable read only memory;

    means for receiving downloaded ASCII coded data as transmitted from said central access network;

    a modem receiving said ASCII coded data and reformatting for input conversion to a serial tone signal;

    a parallel-to-serial converter receiving said serial tone signal and providing output of a parallel multi-digital signal for input to said central processing unit;

    display means receiving output from said central processing unit for displaying said downloaded data;

    dual tone multi-frequency keypad means operative thru said central processing unit for composing an alpha-numeric data message as an encoded serial tone signal for processing through said converter, and for storage in said central processing unit random access memory, and for read out on said display means; and

    means for transmitting a dual tone multi-frequency coded data message of upload to said central access network.

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