Glossary entry

Chinese term or phrase:

双音多频

English translation:

DTMF - Dual Tone Multi Frequency

Added to glossary by Inga Jakobi
Oct 11, 2006 09:34
17 yrs ago
Chinese term

双音多频

Chinese to English Other Telecom(munications) mobile phone
通话过程中可实现结束, 电话薄, ..., 双音多频等功能

Proposed translations

+7
7 mins
Selected

DTMF - Dual Toue Multi Frequeucy

双音多频信号(DTMF),电话系统中电话机与交换机之间的一种用户信令,通常用于发送被叫号码。

在使用双音多频信号之前,电话系统中使用一连串的断续脉冲来传送被叫号码,称为脉冲拨号。脉冲拨号需要电信局中的操作员手工完成长途接续。

双音多频信号是贝尔实验室发明的,其目的是为了自动完成长途呼叫。

双音多频的拨号键盘是4×4的矩阵,每一行代表一个低频,每一列代表一个高频。每按一个键就发送一个高频和低频的正弦信号组合,比如'1'相当于697和1209赫兹(Hz)。交换机可以解码这些频率组合并确定所对应的按键。

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Note added at 13 mins (2006-10-11 09:47:57 GMT)
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'n'都变成了'u'。 重写:

Dual Tone Multi Frequency
Peer comment(s):

agree Shang
4 mins
agree goalsedu
1 hr
agree Denyce Seow
1 hr
agree Bill Lao
1 hr
agree anastasia t (X)
2 hrs
agree Stefanie Sendelbach
3 hrs
agree Giovanni Valenti
19 hrs
Something went wrong...
4 KudoZ points awarded for this answer. Comment: "Thanks a lot!"
3 hrs

DTMF - Dual Tone Multi Frequeucy

1
Peer comment(s):

neutral Stefanie Sendelbach : So what's new?
29 mins
THanx. Nothing new, a copy.
neutral Denyce Seow : You did not correct the spelling mistake in "frequeucy".
6 hrs
thanx. I give asker a chance to correct it.
Something went wrong...
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