×

Programmable automatic calling systems

  • US 4,468,529 A
  • Filed: 04/21/1982
  • Issued: 08/28/1984
  • Est. Priority Date: 04/21/1982
  • Status: Expired due to Fees
First Claim
Patent Images

1. An improved automatic calling system for selectively outpulsing DTMF tone pairs on any of a plurality of channels in response to a service request signal received from a channel requiring service, said automatic calling system including processor means, tone generator means, and means for selectively interconnecting said processor means and said tone generator means to any of said pluraliity of channels to permit a determination of an off hook condition on any of said plurality of channels and an exchange of tone information, the improvement comprising:

  • means interconnected to said processor means for providing an output signal thereto indicating a programming operation is about to be initiated;

    means in said processor means responsive to said output signal indicating a programming operation is about to be initiated for determining if one of said plurality of channels has been placed in an off hook condition and has applied a predetermined DTMF row or column tone to said processor means; and

    means in said processor means responsive to a detection of said one of said plurality of channels being placed in an off hook condition and supplying a single predetermined DTMF row or column tone to said processor means for receiving DTMF tone pairs in sequence from said one of said plurality of channels and storing information corresponding to DTMF tone pairs received as digits of a number sequence to be subsequently outpulsed in response to a service request from any of said plurality of channels.

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