
GSM/GPRS Module
M35 AT Commands Manual
M35_AT_Commands_Manual Confidential / Released
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13.4. AT+VTS DTMF and Tone Generation
Parameter
Example
ATD10086;
// Establish a call
OK
AT+VTS=1
// Send a single DTMF tone according to the prompts of voice
OK
AT+VTS DTMF and Tone Generation
Test Command
AT+VTS=?
Response
+VTS:
(list of supported
<dtmf>
s), ,(list of supported
<duration>
s)
OK
Write Command
AT+VTS=<dtmf-string>
Response
This command allows the transmission of DTMF tones and
arbitrary tones in voice mode. These tones may be used (for
example) when announcing the start of a recording period.
OK
If error is related to ME functionality:
+CME ERROR: <err>
Reference
GSM 07.07
<dtmf-string>
It has a max length of 20 characters, must be entered between double quotes (" ") and
consists of combinations of the following separated by commas. But a single character
does not require quotes
1)
<dtmf>
A single ASCII characters in the set 0-9, #,*, A-D. This is
interpreted as a sequence of DTMF tones whose duration
is set by the
+VTD
command
2)
{<dtmf>, <duration>}
This is interpreted as a DTMF tone whose duration is
determined by
<duration>
<duration>
Duration of the tone in 1/10 seconds range :1-255