Transient free ring relay circuit for arbitrary time switching

Details Transient free ring relay circuit for arbitrary time switching Transient free ring relay circuit for arbitrary time switching

1978-02-22

1979-09-04

Claffy, Kathleen H.

179 84R, H04M 304

Patent

active

041669304

ABSTRACT:
A circuit which connects a ringing voltage generator to a telephone subscriber loop without allowing harmful, electrical transient discharges to develop. Relay contacts are used to switch current limiting resistors into the loop circuit and ringing voltage generator circuit to limit transients during transfer of the ringing voltage generator to or from the subscriber loop circuit. These current limiting resistors are then switched out of the loop when the transients have dissipated.

REFERENCES:
patent: 4071709 (1978-01-01), Lee et al.

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