Apparatus for blocking voice band signals when receiving caller

Details Apparatus for blocking voice band signals when receiving caller Apparatus for blocking voice band signals when receiving caller

1997-02-03

1999-05-04

Wolinsky, Scott

Telephonic communications

Special services

Call waiting

379 9335, 379127, 379142, H04M 157

Patent

active

059012129

ABSTRACT:
An improved caller identity on call waiting unit permits caller identification signals to be received without changing the direct current state of a customer telephone station. This is accomplished by using a capacitor/inductor circuit with appropriate bypass to accomplish the function of blocking voice band signals to and from the station. Advantageously, such an arrangement avoids the problem of falsely disconnecting calls on hold.

REFERENCES:
patent: 4451706 (1984-05-01), Boeckmann
patent: 5263084 (1993-11-01), Chaput et al.
patent: 5287401 (1994-02-01), Lin
patent: 5649002 (1997-07-01), Brady et al.
patent: 5651060 (1997-07-01), Cohn et al.
patent: 5768367 (1998-06-01), Westergaard et al.

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