Loop, dial pulse and ring trip detection circuit

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

H - Electricity

04

M

379/16, 379/57

H04M 3/22 (2006.01) H04M 19/02 (2006.01)

Patent

CA 1116329

TITLE LOOP, DIAL PULSE AND RING TRIP DETECTION CIRCUIT ABSTRACT OF THE DISCLOSURE 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 mag- netic field generating devices and a Hall effect device are used to perform the detection function. A ringing current shunt circuit facilitates loop detection in the presence of ringing current. -3-

310946

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