DT MF信号用于数据传输时无需专用数据传输线且可靠性高。
It need not special data transmission line and has high reliability when DTMF signal is used in data transmission.
该模型包括输入输出以及连接两者的传输线，通过线与线之间的接合模拟了在数据传输过程中可能出现的故障。
It comprise input line and output line and transfer line which connect input and output. This model simulate those likely faults which emerge in transfer process through connection of lines.
该模型包括输入输出以及连接两者的传输线，通过线与线之间的接合模拟了在数据传输过程中可能出现的故障。
It comprise input line and output line and transfer line which connect input and output. This model simulate those likely faults which emerge in transfer process through connection of lines.
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