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---
title
:
双音多频(DTMF)
slug
:
Glossary/DTMF
l10n
:
sourceCommit
:
ada5fa5ef15eadd44b549ecf906423b4a2092f34
---
{{GlossarySidebar}}
**
双音多频
**
(DTMF)信号是一种通过可听音调来表示按键的系统。在美国,通常称为“触摸音”(来源于触摸音商标,在从脉冲拨号过渡到 DTMF 时开始使用)。DTMF 可以表示数字 0-9、字母“A”到“D”以及符号“#”和“
\*
”,虽然很少有电话键盘包括这些字母,因其通常由电话网络用于控制信令。
计算机可能在拨打调制解调器或发送命令到菜单系统(如电话会议或其他用途)时使用 DTMF。
##
参见
-
维基百科上的
[
双音多频
]
(
https://zh.wikipedia.org/wiki/双音多频
)
-
维基百科上的
[
脉冲拨号
]
(
https://zh.wikipedia.org/wiki/脉冲拨号
)
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