Two-way paging system transmission direction sensing and control

Details Two-way paging system transmission direction sensing and control Two-way paging system transmission direction sensing and control

1977-04-29

1978-08-15

Cooper, William C.

H04M 342

Patent

active

041074734

ABSTRACT:
A paging system is entered through appropriate telephone equipment at a master station to supply an audio paging output at a remote station. A paging amplifier is connected to drive a speaker at the remote station to provide the audio output. A direction sensing circuit is disposed between the master and remote stations which operates to sense time relationship between two signals appearing at two separate points within the direction sensing circuit. One time relationship between the two signals indicates a master station transmission and control, and another time relationship indicates a remote station transmission. The method includes coupling signals from the remote station to first and second points in the control circuit and causing a lag to appear between the two points. Signals from the master station are coupled to the second point in the circuit, and the timing of the signals present at the first and second circuit points are compared to obtain an indication of lead or lag therebetween. A lag between the signals at the two points indicates the presence of remote transmission only, and a timing at the second point in the circuit indicates the presence of a signal from the telephone equipment.

REFERENCES:
patent: 3395255 (1968-07-01), Clement
patent: 3714380 (1973-01-01), Berryman et al.
patent: 4008376 (1977-02-01), Flanagan et al.
IEEE Standard Dictionary of Electrical and Electronics Terms, pp. 402-405.

Affiliated with

Also associated with

Rating

Two-way paging system transmission direction sensing and control does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Two-way paging system transmission direction sensing and control, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Two-way paging system transmission direction sensing and control will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1437227