Interface circuit for remote control of a PABX

Details Interface circuit for remote control of a PABX Interface circuit for remote control of a PABX

1985-01-14

1987-08-04

Dwyer, James L.

Telephonic communications

Telephone line or system combined with diverse electrical...

379201, 379218, 434379, H04M 1100, H04M 342

Patent

active

046851224

ABSTRACT:
An interactive audio/visual demonstration system for connection to a telephone system, comprising an audio/visual unit connected to an interface circuit. The interface circuit decodes DTMF tones received from the audio/visual unit and in response causes implementation of one or more special features in the telephone system. The interface circuit is preferably connected to an audio track of a video tape recorder, and to the telephone system, such as a PABX, in order to implement a highly interactive video tape presentation in response to a video tape being played on the video tape recorder. The interface circuit is of simple construction and hence durable and inexpensive.

REFERENCES:
patent: 3654708 (1972-04-01), Brudner
patent: 3882538 (1975-05-01), Lowe
patent: 4332980 (1982-06-01), Reynolds et al.
patent: 4451701 (1984-05-01), Bendig
patent: 4539435 (1985-09-01), Eckmann

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