Modem with automatic callback provisions

Details Modem with automatic callback provisions Modem with automatic callback provisions

1996-11-22

2000-05-16

Woo, Stella

Telephonic communications

Telephone line or system combined with diverse electrical...

Polling

379 9201, 37910601, H04M 1100

Patent

active

060647248

ABSTRACT:
A modem is included in a television receiver for transferring data, such as "pay per view" billing information, to a modem in a billing station during periodic callback operations. The television receiver modem monitors the telephone line for predetermined conditions, such as the presence of high frequency energy or a drop in the telephone line loop current, indicative of telephone use. The television receiver modem will ordinarily inhibit or terminate a callback in order to avoid interfering with normal telephone calls when the predetermined conditions are detected. However, the detection of the predetermined conditions may be caused by telephone network problems and not by normal telephone usage. Accordingly, the modem is controlled to ignore the detection of the conditions after a predetermined number of unsuccessful callbacks due to the detection of the conditions until a successful callback is achieved.

REFERENCES:
patent: 4361851 (1982-11-01), Asip et al.
patent: 4833618 (1989-05-01), Verma et al.
patent: 5081680 (1992-01-01), Bennett
patent: 5157716 (1992-10-01), Naddor et al.
patent: 5239575 (1993-08-01), White et al.
patent: 5270809 (1993-12-01), Gammie et al.
patent: 5300980 (1994-04-01), Maekawa et al.
patent: 5374951 (1994-12-01), Welsh
RCA DSS (I) Receiver, partial schematic, Modem circuitry, 1994.
Data Sheet, Silicon Systems, Single-Chip Modem with UART SSI 73K222U, Dec. 1993.

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