Off-hook telephone sensing system

Details Off-hook telephone sensing system Off-hook telephone sensing system

1980-11-17

1983-07-05

Rubinson, G. Z.

179 18AB, H04M 1100

Patent

active

043920233

ABSTRACT:
An off hook telephone sensing system for use with a voice and data transmission system, including a transaction terminal coupled to a telephone line for data transmission, a telephone instrument coupled to the telephone line for voice transmission, an off hook telephone sensing device coupled to the telephone instrument for detecting the on-hook or off-hook condition of the instrument and for providing an output signal having values in accordance with the on-hook or off-hook condition of the instrument, a switching means coupled to the telephone instrument and to the telephone line for connecting or disconnecting the telephone instrument to or from the telephone line, the transaction terminal including means coupled to the off-hook sensing device and responsive to the output signal for producing an interrupt signal when the off-hook sensing device detects the off-hook condition of the telephone instrument and with the telephone instrument disconnected from the telephone line, and the transaction terminal including means coupled to the switching means and responsive to the interrupt signal for controlling the switching means to connect the telephone instrument to the telephone line after the reception of the interrupt signal and after the termination by the transaction terminal of the data transmission.

REFERENCES:
patent: 4224478 (1980-09-01), Fahey et al.
patent: 4306116 (1981-12-01), McClure et al.
patent: 4321429 (1982-03-01), Takatsuki et al.

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