Apparatus for providing an ISDN to analog interface

Details Apparatus for providing an ISDN to analog interface Apparatus for providing an ISDN to analog interface

1991-03-29

1994-04-19

Dwyer, James L.

Telephonic communications

Subscriber line or transmission line interface

379339, 370 32, 3701101, H04J 312

Patent

active

053053770

ABSTRACT:
An interface for translating signals from a ISDN terminal to an analog telephone terminal including apparatus for separating ISDN signals into control and data signals, apparatus for utilizing the control signals to generate tone signals for transfer to a telephone line, apparatus for translating the digital control signals into signals controlling the transfer of data from digital to analog form, apparatus for translating digital signals in ISDN format into analog signals under control of the apparatus for translating the digital control signals into signals controlling the transfer of data from digital to analog form, apparatus for translating control signals in analog tone format to digital signals for controlling the transfer of signals to an ISDN terminal, apparatus for using the control signals for controlling the transfer of data from analog to digital form, and apparatus for translating analog signals into digital signals in ISDN format under control of the digital signals for controlling the transfer of signals to an ISDN terminal.

REFERENCES:
patent: 4759059 (1988-07-01), Christensen
patent: 4922484 (1990-05-01), Yoshida et al.
patent: 4947483 (1990-08-01), Dirr
patent: 5018141 (1991-05-01), Kim
patent: 5119365 (1992-06-01), Warner et al.
patent: 5134611 (1992-07-01), Steinka et al.
Article entitled: Study on Subscriber Line Circuits Applicable for Analog Telephone and ISDN Interfaces; Satoru Fujii, Yukinao Hashitsume, Takaaki Ozeki and Toshiyuki Tahara; IEEE International Conference on Communications, Boston, 1989.
Article entitled: Evaluation Kits and Real-World Test Beds Fertilize ISDN Environment; Milt Leonard, Electronic Design, Apr. 26, 1990.

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