术语 | dual-tone multifrequency signalling(DTMF) |
释义 | dual-tone multifrequency signalling(DTMF) 双音多频信令法 A signalling method employing set combinations of two specific voice-band frequencies, one of which is selected from a group of four low frequencies, and the other from a group of either three or four relatively high frequencies. 一种通信方法,使用两个特殊音频频率的组合,其中一个频率选自四个低频的一组,一个 选自三个或四个相对高频的一组。 |
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