DTMF is the dialingsignal, 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。
2
DTMF signal used as dialingsignal 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。
3
The apparatus adds a voice module in the main control board, which has signal monitoring function, encoding and decoding function, dialingsignal sending function.