1977-01-05
1977-11-01
Robinson, Thomas A.
179 16F, H04Q 128
Patent
active
040566919
ABSTRACT:
A communication line interface circuit including a floating current source supplying a constant current substantially independent of loop length is disclosed. The line interface circuit is provided with circuitry for line supervision and the detection of dial pulse signaling.
REFERENCES:
patent: 3522384 (1970-07-01), Rickett et al.
patent: 3546564 (1970-12-01), Denny
patent: 3914556 (1975-10-01), Frazee
patent: 3955052 (1976-05-01), Orbach
patent: 4027235 (1977-05-01), Macrander et al.
Freimanis Laimons
Mussman Harry Edward
Smith DeWitt Paul
Bell Telephone Laboratories Incorporated
Robinson Thomas A.
Visserman Peter
LandOfFree
Telephone subscriber line 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 Telephone subscriber line circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Telephone subscriber line circuit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-9005