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SIM800 Series_AT Command Manual_V1.09

2015-08-03

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.

Write Command

AT+VTD=<n>

Parameters

<n>

1-255 Duration of the tone in 1/10 seconds

Parameter Saving

Mode

AT&W_SAVE

Max

Response

Time

Reference

3GPP TS 27.007

[13]

Note

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)

Test Command

AT+VTS=?

Parameters

See Write Command

Write Command

Generate

tone

Duration is set by

+VTD

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.

Note: D is used only for dialing.

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

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