Call waiting cancellation device

Details Call waiting cancellation device Call waiting cancellation device

1995-05-31

1996-08-13

Hofsass, Jeffery

Telephonic communications

Special services

Call waiting

379 93, 379 97, 379201, 358434, 358437, H04N 132, H04M 342

Patent

active

055464513

ABSTRACT:
A device that links a telecommunication device (for example a data terminal, a telephone instrument, a message terminal or a video terminal) directly to a telephone line for cancellation of a call waiting tone. When an incoming call is received by the linked telecommunication device, the device according to the invention places the interface terminal on hold while maintaining it on line, while a special call waiting cancellation DTMF code such as "*70" is generated and transmitted. Following this action, telecommunication device is returned to the line and the original transmission is allowed to resume.

REFERENCES:
patent: 4661975 (1987-04-01), Brecher
patent: 4852151 (1989-07-01), Dittakavi et al.
patent: 4995074 (1991-02-01), Goldman et al.
patent: 5287401 (1994-02-01), Lin
patent: 5327488 (1994-07-01), Garland
patent: 5337351 (1994-08-01), Manabe et al.
patent: 5425092 (1995-06-01), Quirk
patent: 5432616 (1995-07-01), Fukao et al.
patent: 5432845 (1995-07-01), Burd et al
patent: 5448631 (1995-09-01), Cain

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