Telephone apparatus for caller ID

Details Telephone apparatus for caller ID Telephone apparatus for caller ID

1995-06-20

1997-08-19

Kuntz, Curtis

Telephonic communications

Reception of calling information at substation in wireline...

Blocking caller id transmission

379377, 379380, H04M 156, H04M 1506, H04M 100, H04M 300

Patent

active

056596022

ABSTRACT:
A telephone apparatus for connection to central office equipment to receive a caller ID signal therefrom and having an operating mode in which line current is less than a threshold at which off-hook state is detected, the line current drawn in said mode being sufficient to allow reception and processing of the caller ID signal. In this way, the telephone apparatus can receive and process the caller ID signal, and so can determine whether the call can be accepted, without the central office equipment recognizing the apparatus as having gone off-hook (i.e. having already accepted the call).

REFERENCES:
patent: 4242539 (1980-12-01), Hashimoto
patent: 4320258 (1982-03-01), McDonald
patent: 4748664 (1988-05-01), Blomley
patent: 5117452 (1992-05-01), Callele et al.
patent: 5263084 (1993-11-01), Chaput et al.
patent: 5454031 (1995-09-01), Gray et al.
patent: 5546448 (1996-08-01), Caswell et al.

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