Dual-tone multi-frequency signaling
- 双音多频(双音多频信号是电话系统中的用户信令,用于拨号和其他功能,如自动总机和语音应答)
Dual-tone multi-frequency signaling
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abstract:
Dual-tone multi-frequency signaling (DTMF) is used for telecommunication signaling over analog telephone lines in the voice-frequency band between telephone handsets and other communications devices and the switching center. The version of DTMF that is used in push-button telephones for tone dialing is known as Touch-Tone.
以上来源于:
WordNet