Facsimile communication method and facsimile machine

Details Facsimile communication method and facsimile machine Facsimile communication method and facsimile machine

1989-08-03

1991-03-12

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Auxiliary signal

358435, 358439, H04N 100

Patent

active

049997165

ABSTRACT:
In a facsimile communication method, a receiving facsimile machine receives a training check field signal TCF from a transmitting facsimile machine and sends a confirmation to receive signal CFR or a failure to train signal FTT to the transmitting facsimile machine depending on a result of the reception of the training check field signal TCF so as to determine a modem transmission speed. A number of erroneous bits in the training check field signal TCF which is sent from the transmitting facsimile machine at an initial modem transmission speed and received by the receiving facsimile machine is detected, and the modem transmission speed is set based on the detected number of erroneous bits. A facsimile information bit which indicates the set modem transmission speed is added to the failure to train signal FTT which is sent from the receiving facsimile machine to the transmitting facsimile machine. The training check filed signal TCF is sent from the transmitting facsimile machine to the receiving facsimile machine at the modem transmission speed indicated by the failure to train signal FTT.

REFERENCES:
patent: 4589111 (1986-05-01), Adachi
patent: 4860115 (1989-08-01), Ogura
patent: 4876609 (1989-10-01), Ogura
patent: 4887162 (1989-12-01), Arai
patent: 4910610 (1990-03-01), Utsugi

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