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7 at+vts dtmf and tone generation, At+vts, Obile – Siemens MC55 User Manual

Page 399: Mc55 at command set

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MC55 AT Command Set

16.7 AT+VTS

s

m

obile

MC55_ATC_V01.05

Page 399 of 469

2/10/04

Confidential / Released

16.7

AT+VTS DTMF and tone generation

The Write command is intended to send ASCII characters or strings which cause the Mobile Switching Center
(MSC) to transmit DTMF tones to a remote subscriber. It works during active voice calls only and offers the fol-
lowing variants:

AT+VTS

=

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

AT+VTD

.

AT+VTS

=

[,

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

vidually determined during the call.

Syntax

Parameter Description

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.

Test Command

AT+VTS=?

Response(s)

+VTS:

(list of supported

s), (list of supported

s)

OK

Write Command

AT+VTS=

Response(s)

OK

Write Command

AT+VTS=

[,

]

Response(s)

OK

PIN

ASC0

ASC1

MUX1

MUX2

MUX3

!

%

%

%

%

%

Reference(s)

GSM 07.07

(str)

(str)