Loop, dial pulse and ring trip detection circuit with...

Details Loop, dial pulse and ring trip detection circuit with... Loop, dial pulse and ring trip detection circuit with...

H - Electricity

04

Q

379/57

H04Q 1/48 (2006.01) H04M 3/22 (2006.01) H04M 19/02 (2006.01)

Patent

CA 1138581

TITLE LOOP, DIAL PULSE AND RING TRIP DETECTION CIRCUIT WITH CAPACITIVE SHUNT NETWORK ABSTRACT OF THE INVENTION A circuit which detects the presence and absence of a telephone subscriber loop, before and after ringing current is applied to the loop. Coils functioning as magnetic field generating devices and a Hall effects device are used to perform the detection function. Inclusion of a capacitive shunt network limits the responsiveness of the Hall effect device during ringing, permitting use of the device on lines to which multiple ringers are connected.

338522

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