Programmable line circuit

Details Programmable line circuit Programmable line circuit

H - Electricity

04

M

379/57

H04M 3/22 (2006.01) H04M 3/00 (2006.01) H04M 3/30 (2006.01) H04M 19/02 (2006.01) H04Q 3/00 (2006.01)

Patent

CA 1173182

TITLE PROGRAMMABLE LINE CIRCUIT ABSTRACT A circuit which can perform a plurality of sensor functions relating to telephone subscriber supervisory circuits. These functions can occur before and after ringing current is applied to the subscriber line facility. Coils function as magnetic field generating devices and a Hall effect device is used to perform the sensory functions. A program- mable comparator is used to compare detected condi- tions with predetermined thresholds.

393028

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