Electronic polling and calling communication system
First Claim
1. For electronic communication between a central station which transmits a communication signal train consisting of a series of N + 1 sequential uniform-amplitude square wave pulses, each of said N pulses representing a different remote station and being of short duration for an unselected remote station and being of intermediate duration for a selected remote station and the additional synch pulse being of long duration:
- means at each remote station for receiving the transmitted signal train and for producing a pulse signal on a first signal line (C pulses) for each received short duration pulse or greater and a pulse signal on a second signal line (R pulses) for each received synch pulse;
sequencer circuit means having N + 1 stages and an output signal line for each stage;
means for feeding said pulses from said first signal line into said sequencer for advancing the signal state of the sequencer from stage to stage in sequence for each received C pulse; and
means for combining the signal on the output signal line of a selected one of the sequencer stages with a third signal line to produce signal output upon concurrent appearance of a signal from the selected sequencer stage and on said third signal line.
1 Assignment
0 Petitions
Accused Products
Abstract
In an electronic communication system, having a central transmitting station and N remote receiving stations, the central station sends out a signal train consisting of a wide reset or synchronizing pulse (R) and a series of N narrower time-sequenced or time-slotted clock pulses (C). An intermediate width station selector pulse (S) in the signal train designates a call to a particular remote station. The receiving stations are equipped to recognize, acknowledge and respond to the signal train in the correct fashion if in the calling mode or in the polling mode of operation.
13 Citations
7 Claims
-
1. For electronic communication between a central station which transmits a communication signal train consisting of a series of N + 1 sequential uniform-amplitude square wave pulses, each of said N pulses representing a different remote station and being of short duration for an unselected remote station and being of intermediate duration for a selected remote station and the additional synch pulse being of long duration:
- means at each remote station for receiving the transmitted signal train and for producing a pulse signal on a first signal line (C pulses) for each received short duration pulse or greater and a pulse signal on a second signal line (R pulses) for each received synch pulse;
sequencer circuit means having N + 1 stages and an output signal line for each stage; means for feeding said pulses from said first signal line into said sequencer for advancing the signal state of the sequencer from stage to stage in sequence for each received C pulse; and means for combining the signal on the output signal line of a selected one of the sequencer stages with a third signal line to produce signal output upon concurrent appearance of a signal from the selected sequencer stage and on said third signal line. - View Dependent Claims (2, 3, 4, 5, 6, 7)
- means at each remote station for receiving the transmitted signal train and for producing a pulse signal on a first signal line (C pulses) for each received short duration pulse or greater and a pulse signal on a second signal line (R pulses) for each received synch pulse;
Specification