Facsimile machine for transmitting information indicative of the

Details Facsimile machine for transmitting information indicative of the Facsimile machine for transmitting information indicative of the

1994-12-28

1996-12-17

Vu, Kim

Facsimile and static presentation processing

Facsimile

Auxiliary signal

358435, 358436, 358438, 358439, H04N 100

Patent

active

055859380

ABSTRACT:
When a protocol signal is transmitted between a facsimile machine which operates under new ITU-T Recommendation and another facsimile machine which operates under old ITU-T Recommendation, a certain functional bit to specify a particular function of the new facsimile machine may not be understood by the old facsimile machine if such a functional bit is previously included in a protocol signal for non-standard procedure but now included in a protocol signal for standard procedure. If the old facsimile machine does not interpret the functional bit, a desired communication cannot be conducted between the two facsimile machines. To avoid such a case, a prescribed functional bit is included in both a protocol signal for standard procedure and a protocol signal for non-standard procedure. The functional bit included in the protocol signal for non-standard procedure will be understood by the old facsimile machine. When both facsimile machines operate under new ITU-T Recommendation, the functional bit included in the protocol signal for standard procedure establishes the desired mode of communication.

REFERENCES:
patent: 4727429 (1988-02-01), Ueno
patent: 4885755 (1989-12-01), Yoshida
patent: 5125025 (1992-06-01), Lin
patent: 5274462 (1993-12-01), Satoh
patent: 5418628 (1995-05-01), Perkins
Fax: Digital Facsimile Technology & Applications 2nd Edition, D. Bodson, K. McConnell, R. Schaphrost 1992, pp. 36-49.

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