Integrated ringing circuit and a ring trip circuit for the same

Details Integrated ringing circuit and a ring trip circuit for the same Integrated ringing circuit and a ring trip circuit for the same

1987-10-20

1989-05-02

Mottola, Steven

Telephonic communications

Supervisory or control line signaling

Signal reception at substation

379375, 379418, H04M 166

Patent

active

048275034

ABSTRACT:
A constant current circuit, including a constant current source which draws a current and a constant current source which sends a current, is connected to a two-wire subscriber line. A ringing signal made up of constant stream of positive and negative current signals is transmitted to the telephone line. The OFF-hook condition of a telephone set is detected by comparing the output voltage of a constant current circuit with a reference voltage for ring trip.

REFERENCES:
patent: 4239935 (1980-12-01), Bosik et al.
patent: 4276448 (1981-06-01), Embree et al.
patent: 4310733 (1982-01-01), Schoofs

Affiliated with

Also associated with

Rating

Integrated ringing circuit and a ring trip circuit for the same does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Integrated ringing circuit and a ring trip circuit for the same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Integrated ringing circuit and a ring trip circuit for the same will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-590943