Automatic call transmitter of the dual tone multifrequency type

Details Automatic call transmitter of the dual tone multifrequency type Automatic call transmitter of the dual tone multifrequency type

1974-05-31

1977-02-08

Cardillo, Jr., Raymond F.

179 5P, 179 90BB, H04M 100, H04M 1100

Patent

active

040073335

ABSTRACT:
An automatic call transmitter which uses a dual tone multifrequency generator first under the control of a pushbutton set to record, on a recording medium, a series of dual tones corresponding to a telephone number to be called, and which then uses this generator to regenerate pairs of voice frequencies corresponding to the recorded dual tones, under the control of switching means rendered frequency responsive by associated tuning means and selectively operated from the recorded tones upon playback to transmit the telephone number over a line. The automatic call transmitter may be in the form of a telephone reporting unit and the recording medium, such as an endless magnetic tape wound on a cartridge may also be used for recording and/or transmitting an oral message.

REFERENCES:
patent: 3387099 (1968-06-01), Fischer et al.
patent: 3510598 (1970-05-01), Ballin et al.
patent: 3536853 (1970-10-01), Tate
patent: 3595999 (1971-07-01), Cole
patent: 3710024 (1973-01-01), Lacey

Affiliated with

Also associated with

Rating

Automatic call transmitter of the dual tone multifrequency type does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Automatic call transmitter of the dual tone multifrequency type, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic call transmitter of the dual tone multifrequency type will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1214281