Patent
1980-12-01
1982-12-28
Popek, Joseph A.
179 2DP, H04M 1100
Patent
active
043663486
ABSTRACT:
An apparatus and method are described for receiving multi-frequency tone signals, such as those which are now being utilized in telephone systems, and for deriving the informational content available from such signals in such a way as to permit storage of that information for subsequent selective retrieval. The multi-frequency signals are received from, for example, a computer operated electronic telecommunication switching system, and, for example, they have originated at the tone-generating keyboard of a telephone. Detection apparatus responsive to the frequency content of the signals produces output signals corresponding to the specific frequencies received, and these output signals are converted into digital signals of corresponding values, which digital signals have a coding form corresponding to the specific form of the digital network involved. A storage device is provided for receiving the digital signals and storing them in a selected location. The stored digital signals may be selectively read by, for example, a telephone subscriber, and the signals so read are displayed on a visual display device or the like.
Lett Gerald L.
Popek Joseph A.
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