On-hook/off-hook status check circuit

Details On-hook/off-hook status check circuit On-hook/off-hook status check circuit

1980-02-19

1981-08-11

Brigance, Gerald L.

179 90BD, 179 90B, 179 16AA, H04M 124

Patent

active

042836034

ABSTRACT:
An on-hook/off-hook status check circuit is disclosed which is connectable between a telephone subscriber loop and a telephone station set. The circuit, upon activation, provides adjunct telephone station equipment with a predetermined sequence of outputs from two opto-isolator circuits, the sequence identifying the on-hook or off-hook status of the telephone set. The circuit may be used with adjunct station equipment in accordance with station set modularity, loop transmission and signaling, and central office traffic engineering objectives.

REFERENCES:
patent: 3128351 (1964-04-01), Hohmann et al.
patent: 3422229 (1969-01-01), Wallace
patent: 3819866 (1974-06-01), Hawley
patent: 3838223 (1974-09-01), Lee et al.
patent: 3849605 (1974-11-01), Russell
patent: 3899645 (1975-08-01), Brafman
patent: 3914556 (1975-10-01), Frazee
patent: 4110569 (1978-08-01), Schindler et al.
IBM Technical Disclosure Bulletin, "Telephone On/Off Hook Detector", Glowienka and Reiley, vol. 16, No. 5, Oct. 1973, pp. 1558-1559.

Affiliated with

Also associated with

Rating

On-hook/off-hook status check circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with On-hook/off-hook status check circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On-hook/off-hook status check circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1027495