Distributed privacy oriented telephone extension system

Details Distributed privacy oriented telephone extension system Distributed privacy oriented telephone extension system

1986-02-21

1987-10-27

Rubinson, Gene Z.

Telephonic communications

Call or terminal access alarm or control

Lockout or double use signalling

379387, 379442, H04M 170, H04M 316

Patent

active

047034998

ABSTRACT:
A distributed privacy oriented telephone extension system having up to three different kinds of privacy circuits of different capacity for coupling a respective extension phone to the telephone line. Selective user configuration of the telephone extension system effects one level of privacy control and spontaneous user control during conversation to disconnect or reconnect other phones effects a second level of user control relating to the extent of privacy achieved.

REFERENCES:
patent: 3691308 (1972-09-01), Anger et al.
patent: 3822366 (1974-07-01), O'Dea et al.
patent: 3852537 (1974-12-01), Vincent
patent: 3870829 (1975-03-01), Chacon
patent: 4384171 (1983-05-01), Klee

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