Programmable line circuit

Details Programmable line circuit Programmable line circuit

1980-12-29

1982-10-19

Robinson, Thomas A.

H04G 130, H04M 300

Patent

active

043552099

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 programmable comparator is used to compare detected conditions with predetermined thresholds.

REFERENCES:
patent: 4104488 (1978-08-01), Weir et al.
patent: 4191859 (1980-03-01), Sabon
patent: 4282407 (1981-08-01), Stiefel et al.

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