| 摘要 |
A facsimile machine is provided with a fall-back strategy arranged to track not only errors occurring in received scan lines randomly disposed over a received facsimile page, but also errors occurring in each of a series of scan lines. If the level of each such error at least equals the value of a respective threshold adapted to the current transmission rate and facsimile resolution, then the transmission rate is changed, in which case, the value of each threshold is changed in accordance with a new transmission rate.
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