| 摘要 |
In a facsimile communication method capable of preventing receipt of an echo of data being transmitted, a preamble-preceded frame is used as a data to be transmitted, and the frame is allowed to be received only when its preceding preamble has been received. For this purpose, the total time length of the preamble-preceded frame being transmitted is monitored. If it is shorter than a predetermined time length, a number of flags as required are added to the end of preamble-preceded frame, thereby ensuring that the total time length of transmitting the data is always longer than the predetermined time length. In this manner, it is ensured that an echo of data being transmitted returns only while transmission of the data is in progress and is thus not received.
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