Data communication apparatus and method for switching from g3 an

Details Data communication apparatus and method for switching from g3 an Data communication apparatus and method for switching from g3 an

1993-07-08

1996-08-20

Lee, Thomas C.

Telephonic communications

Special services

Anonymous party

379100, 358442, 364DIG1, 3642222, 3642408, 364DIG2, 3649191, 36492792, H04N 100, H04N 142

Patent

active

055487815

ABSTRACT:
A data communication apparatus and associated method for switching from the Compatible mode to the ECM mode. The data communication apparatus receives a protocol message transmitted by a second data communication apparatus in accordance with a Compatible mode of operation. The first data communication apparatus then inverts the polarity of the received protocol message so that the inverted polarity protocol message is formatted in accordance with a G3 mode of operation. Then, the first data communication apparatus determines from the inverted polarity protocol message that the second data communication apparatus will receive the image data if it is transmitted in accordance with an ECM mode of operation. The image data is then transmitted in accordance with the ECM mode of operation to the second data communication apparatus.

REFERENCES:
patent: 5159465 (1992-10-01), Maemura et al.
patent: 5220439 (1993-06-01), Yoshida

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