Hookswitch bounce resistant telephone hold-mute circuit

Details Hookswitch bounce resistant telephone hold-mute circuit Hookswitch bounce resistant telephone hold-mute circuit

1983-12-12

1985-05-14

Rubinson, Gene Z.

179 99H, H04M 100

Patent

active

045174148

ABSTRACT:
A hold circuit for use with a single line telephone operable over long or short telephone loops. The included circuit during response to the momentary operation of a manual switch actuates a silicon controlled rectifier to place a resistive load across the telephone line thus allowing the subscriber at the telephone instrument to go "on-hook". Subsequent removal of the basic instrument handset from the hook-switch, or of a related extension telephone going "off-hook", will cause the resistive load to be removed.

REFERENCES:
patent: 4447674 (1984-05-01), Grantland et al.
patent: 4451706 (1984-05-01), Boeckman

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