Electronic exchange having function of calling number delivery s

Details Electronic exchange having function of calling number delivery s Electronic exchange having function of calling number delivery s

1994-01-31

1995-05-02

Dwyer, James L.

Telephonic communications

Audio message storage, retrieval, or synthesis

379142, 379196, 379246, H04M 164, H04M 157

Patent

active

054127114

ABSTRACT:
An electronic exchange capable of providing at least a calling number delivery (CND) service, including a registration search unit for investigating whether or not a call terminating subscriber is registered to use the CND service every time a call is initiated from a call originating subscriber, a confirmation unit for inquiring to the call originating subscriber, if the call terminating subscriber is registered to use the CND service, whether or not the call originating subscriber intends to achieve a calling number delivery blocking (CNDB) service, and a selective transmission unit for transmitting or not transmitting data indicative of the telephone number of the call originating subscriber in accordance with an answer responding to the inquiry by the confirmation unit.

REFERENCES:
patent: 4926471 (1990-05-01), Ikeda
patent: 5033076 (1991-07-01), Jones et al.
patent: 5228080 (1993-07-01), Nutter et al.
patent: 5283824 (1994-02-01), Shaw

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