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

H - Electricity

04

M

379/4

H04M 11/00 (2006.01) H04M 3/32 (2006.01) H04M 3/42 (2006.01) H04Q 3/62 (2006.01)

Patent

CA 1205933

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.

453611

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