Your phone settings are currently set to indicate that you do not have touch tone service.

您的电话当前设置表明您不具有双音频电话服务。

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All you need is a touch-tone phone, and neither a computer nor any special software is required.

只需一部按键式电话，既不需要电脑也不需要任何特殊软件。

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Mobile phone keypad, computer keyboard are all touch-tone keypad.

手机按键、微机键盘都属于按键式键盘。

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In 1973 he cofounded Mitel, which pioneered electronic switching systems that allowed for operator-free PBXs and touch-tone phone sets.

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But the new, better phone system also enabled new applications ranging from simple touch-tone ordering systems to, ultimately, the Internet which supported an entirely new set of commercial opportunities and jobs.

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