DTMF is the dialing signal, which is widely used in the new generation of telephone.
DTMF信号是音频电话中的拨号信号，广泛用于新一代电话机。
DTMF signal used as dialing signal in tone telephone applied in many new field widely.
DT MF信号是音频电话中的拨号信号，广泛应用于新一代电话机。
The apparatus adds a voice module in the main control board, which has signal monitoring function, encoding and decoding function, dialing signal sending function.
本发明所述的装置是在主控板中增加一个语音模块。语音模块具有信号监测功能，编解码功能，拨号信号发送功能。
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