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TC63_ATC_V00.490

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5/24/05

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 is intended to send ASCII characters or strings which cause the Mobile Switching Center (MSC) to trans-

mit DTMF tones to a remote subscriber. The command can only be used during active voice calls and offers the

following variants: 
•

 allows to send a sequence of DTMF tones with a duration defined with 

. 

•

] allows to send a single DTMF tone. In this case, the duration can be ind-

vidually determined during the call. 

String of ASCII characters in the set 0-9,#,*,A, B, C, D. Maximal length of the string is 29. The string must be

enclosed in quotation marks ("...").

ASCII character in the set 0...9,#,*, A, B, C, D.

Tone duration in 1/10 second. If not specified current setting of 

 is used.

1...255

Test Command

AT+VTS=?

Response(s)

+VTS: 

(list of supported

s), (list of supported

OK

Write Command

Response(s)

OK

Write Command

[, 

]

Response(s)

OK

ERROR

+CME ERROR

Reference(s)

PIN

ASC0 ASC1 USB MUX1 MUX2 MUX3 Charge

4

Last

GSM 07.07

!

%

%

%

%

%

%

!

!

!

<dtmfString>

(str)

<dtmf>

(str)

<duration>

(num)