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- 通信DTMFcommunication DTMF
- 短波地空通信多普勒频移对DTMF信号解码影响Effect to DTMF decoding of Doppler shift in ground-air HF communication
- 采用DTMF方式通信的安全报警系统Safety Alert System By DTMF Communication mode
- DTMFDual Tone Multi - Frequency
- 你亲自或通信申请均可。You may apply in person or by letter.
- DTMF信号DTMF signal
- DTMF解码DTMF decode
- 两个姑娘现在定期互相通信。Both girls write to each other regularly now.
- DTMF信令DTMF signaling
- 你一直和他通信吗?Have you been corresponding with him?
- 地下铁道通信communication in the subway
- DTMF信号检测DTMF signal detection
- 频分多路通信frequency division multiplex communication
- 双音多频（DTMF）DTMF(Dual Tone Multiple Frequency)
- 铁路长途通信railway toll communication
- DTMF（双音多频）Dual- Tone Multifrequency
- 流星余迹通信设备meteoric trail communication equipment
- 双音多频（DTMF）传输double tone multifrequency(DTMF)
- 军鸽通信military pigeon communication
- DTMF信号的产生和检测。Generation and detection of the DTMF signals.
