Telephonic communications – Telephone line or system combined with diverse electrical... – Having transmission of a digital message signal over a...
Patent
1994-10-03
1997-09-09
Brown, Thomas W.
Telephonic communications
Telephone line or system combined with diverse electrical...
Having transmission of a digital message signal over a...
379 67, 379 9328, 37910015, H04M 164, H04M 1100
Patent
active
056664036
ABSTRACT:
A device and a method for directing incoming calls from a single input telephone line to either a facsimile machine, a data modem, or a telephone is provided. The device and method provide for "isolating" both a facsimile machine and a data modem until after a predetermined delay period, thus preventing them to answer the call. If a person or answering machine has not answered the call within the delay period, an off-hook condition is simulated to the input telephone line, thus "answering" the call. The signal on the input telephone line is then detected. If the signal includes a DTMF digit, various functions are performed including resetting internal variables. If a facsimile handshake signal is detected, the facsimile machine is rung with a ring simulator. The facsimile machine can then read the incoming handshake signal and proceed in a conventional fashion. If, however, neither of these two signals are detected, and a telephone answering device has not answered the call, the data modem port is rung with the ring simulator. The data modem will then begin receiving the transmitted signal in a conventional fashion. If the call is answered during the delay period provided by the invention, and the transmission is a facsimile handshake signal, the call is automatically transferred to the waiting facsimile machine.
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Pathfinder Description, Viking Electronics,Inc. Catalog, 1992, p. 10.
Brown Thomas W.
TT Systems Corporation
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