Data communication apparatus detecting interrupt requests throug

Details Data communication apparatus detecting interrupt requests throug Data communication apparatus detecting interrupt requests throug

1994-10-21

1995-06-20

Nguyen, Hoa T.

Excavating

371 55, 371 52, G06F 1100

Patent

active

054266475

ABSTRACT:
A facsimile apparatus receives data from a transmitting station and is provided with a capability for determining when an interrupt request signal has been received from another station. It is first judged whether an error has occurred in received image information on one line. If an error occurrence is detected, its time period is then measured. If the error period coincides with the output time period for a prescribed interrupt request signal, it is determined that an interrupt request signal has been received. Further, it may additionally be determined whether the coincidence has occurred a plurality of times in succession thereby affirming the reception of an interruption request signal.

REFERENCES:
patent: 4234953 (1980-11-01), Kline
patent: 4356348 (1982-10-01), Smith
patent: 4395755 (1983-07-01), Wakai
patent: 4800562 (1989-01-01), Hicks
Distler et al., "Error Signature Test System", AT&T, Technical Digest, No. 77, Oct. 1985, pp. 19-20.

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