Line conditioning and transfer circuit

Details Line conditioning and transfer circuit Line conditioning and transfer circuit

1976-12-16

1978-01-31

Robinson, Thomas A.

179 84R, H04M 304

Patent

active

040717097

ABSTRACT:
A circuit for electrically preconditioning a telephone line and switching an associated ringing generator on and off at the instant of opportune circuit conditions to eliminate circuit transients. The line circuit is switched by means of a relay so that an equipotential charge exists on either side of the switching contacts at closure and with zero current through the contacts at opening to eliminate suppression devices.

REFERENCES:
patent: 3720793 (1973-03-01), Hofmann

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