Communications privacy protection system by replacing calling pa

Details Communications privacy protection system by replacing calling pa Communications privacy protection system by replacing calling pa

1995-03-03

1996-12-31

Chin, Wellington

Telephonic communications

Reception of calling information at substation in wireline...

Blocking caller id transmission

379213, 379245, H04M 156, H04M 1500, H04M 342, H04M 300

Patent

active

055901840

ABSTRACT:
A telephone subscriber of a privacy communications service is allowed to use a randomly selected non-assigned telephone number--instead of the subscriber's real telephone number--as a return phone number in a telephone message left for a called party. The non-assigned, randomly selected telephone number becomes inoperative after a threshold that may be pre-imposed by the subscriber is exceeded. According to a feature of the invention, the function of randomly selecting a non-assigned telephone number may also include replacing the calling party number with the randomly selected number. Hence, when a caller-id display unit receives the telephone number of an incoming call for which the privacy communications service is used, the randomly selected telephone number--as opposed to the real telephone number--is received and recorded by the caller-id display unit.

REFERENCES:
patent: 5033076 (1991-07-01), Jones et al.
patent: 5161181 (1992-11-01), Zwick
patent: 5278894 (1994-01-01), Shaw
patent: 5289542 (1994-02-01), Kessler
patent: 5333185 (1994-07-01), Burke et al.
patent: 5341411 (1994-08-01), Hashimoto
patent: 5426693 (1995-06-01), Rosen
patent: 5475744 (1995-12-01), Ikeda
patent: 5521969 (1996-05-01), Paulus et al.

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