Detector circuit for sensing battery polarity and loop closure

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

H04M 714

Patent

active

041267656

ABSTRACT:
A detector circuit for use in conjunction with a trunk circuit of a PABX telephone system interfacing with a central office providing for constant monitoring of normal or reverse battery application by the central office during the high impedance idle state or the low impedance busy state. In addition, the circuit provides for detection of: proper loop closure, electrically shorted tip and ring leads, open circuit condition of tip and ring leads or a grounded ring lead. Furthermore, the circuit indicates when current flow of proper magnitude is sensed during normal or reverse battery conditions.

REFERENCES:
patent: 4049919 (1977-09-01), Young

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Detector circuit for sensing battery polarity and loop closure does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Detector circuit for sensing battery polarity and loop closure, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Detector circuit for sensing battery polarity and loop closure will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2050319

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.