| 摘要 |
A data communication apparatus for performing a communication of a procedure signal at a low transmission speed, and performing a communication of data at a high transmission speed, includes a discrimination unit for discrimination whether or not a received signal is an echo signal, and a detection unit for detecting reception of one of high- and low-speed signals according to a discrimination result of the discrimination unit at a timing at which the high- and low-speed signals in communication may be received.
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