Automatic telephone dialer system

Details Automatic telephone dialer system Automatic telephone dialer system

1995-03-20

1997-07-01

Zele, Krista M.

Telephonic communications

Supervisory or control line signaling

Substation originated

379359, 379216, H04M 127

Patent

active

056446330

ABSTRACT:
An autodialer including a DTMF transceiver for connection between a user telephone device and the telephone line. The DTMF transceiver is connected in a double isolation mode to allow for monitoring of DTMF tones from either the telephone line or from the user telephone device. The DTMF transceiver is connected to a microprocessor for processing a plurality of program instructions stored in a memory device. The autodialer uses its program instructions to determine how to handle outgoing dial sequences. At the start of an outgoing call, the digit sequences and outgoing dial sequences. At the start of an outgoing call, the autodialer monitors the DTMF tones generated by the user telephone device looking for an intercept digit sequence. If an intercept digit sequence occurs, the autodialer hangs up on the telephone line and begins an outgoing dial sequence while continuing to capture the additional DTMF tones from the user telephone device. When the autodialer completes the outgoing sequence, it performs a cut-through to connect the user telephone device to the telephone line. If intercept does not occur, the autodialer ignores activity on the line until the start of the next call. Program language instructions (tokens) are translated into the autodialer's internal program instruction format before being transmitted to the autodialer via DTMF tones. This allows for easy remote programmability utilizing sequences of DTMF tones transmitted from the host to the autodialer. The autodialer further includes a program instruction interpreter for interpreting stored program instructions.

REFERENCES:
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patent: 4674111 (1987-06-01), Monet et al.
patent: 4802199 (1989-01-01), Lange et al.
patent: 4920560 (1990-04-01), Kageyama
patent: 4964159 (1990-10-01), Son
patent: 5241589 (1993-08-01), Jefferson
patent: 5337349 (1994-08-01), Furohashi et al.
patent: 5339357 (1994-08-01), Sawamura et al.
patent: 5475743 (1995-12-01), Nixon et al.
patent: 5485513 (1996-01-01), Goedken et al.

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