Data Sheet

Smart Machine Smart Decision
See Write Command
Response
This command refers to an integer <n> that defines the length of tones
emitted as a result of the +VTS command. This does not affect the D
command.
OK
Write Command
AT+VTD=<n>
Parameters
<n> 1-255 Duration of the tone in 1/10 seconds
Parameter Saving AT&W_SAVE
Mode
Max Response -
Time
Reference
3GPP TS 27.007
Note
[13]
3.2.37 AT+VTS DTMF and Tone Generation
AT+VTS DTMF and Tone Generation
Response
+VTS: (list of supported <dtmf>s),(list of supported <duration>s)
OK
Test Command
AT+VTS=?
Parameters
See Write Command
Write Command
Generate tone
Response
This Command allows the transmission of DTMF tones and arbitrary
Duration is set by tones in voice mode. These tones may be used (for example) when
+VTD announcing the start of a recording period.
AT+VTS=<dtmf-
Note: D is used only for dialing.
string> OK
If error is related to ME functionality:
+CME ERROR: <err>
Note: The Command is writing only.
Parameters
<dtmf-string> Which 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
SIM800 Series_AT Command Manual_V1.05 94 2014-07-31