Ringing voltage transfer circuit

Details Ringing voltage transfer circuit Ringing voltage transfer circuit

1978-11-24

1980-05-06

Tupper, Robert S.

H04Q 900

Patent

active

042018978

ABSTRACT:
A circuit which prepares a conductive path between a ringing voltage generator and a telephone subscriber loop circuit prior to the application of ringing voltage to the conductive path. Photo coupled switching and monitoring circuits are used to coordinate application of ringing voltage with operation of a ring relay which completes the circuit path between the ringing voltage generator and the loop circuit.

REFERENCES:
patent: 3536852 (1970-10-01), Dolarmore
patent: 3941939 (1976-03-01), Holmes et al.

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