... 多频发送器 multifrequency sender，MFS 多频终端 multifrequency terminal 多频音调 multifrequency tone ...
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双音多频是一种在话音信道用音调来表示数字的方法，它可以用来在模拟话音信道传输信令，因此在通信中有广泛的应用。
Provide is a voice channel and tone to represent Numbers method, which can be used to transmit analog voice, so in communication has been widely used.
双音多频(DTMF)是一种在话音信道用音调来表示数字的方法，它可以用来在模拟话音信道传输信令，因此在通信中有广泛的应用。
Provide (DTMF) is a voice channel and tone to represent Numbers method, which can be used to transmit analog voice, so in communication has been widely used.
信号将一系列的方式多频(MF)音调，很像之间互动音频拨号开关。
Signaling took the form of a series of multifrequency (MF) tones, much like touch tone dialing between switches.
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