At+Vts Dtmf And Tone Generation - SimCom SIM7500 Series At Command Manual

+COLP: "10086",129,,,
OK
6.15

AT+VTS DTMF and tone generation

Description
This command allows the transmission of DTMF tones and arbitrary tones which cause the Mobile
Switching Center (MSC) to transmit tones to a remote subscriber. The command can only be used
in voice mode of operation (active voice call).
NOTE: The END event of voice call will terminate the transmission of tones, and as an operator
option, the tone may be ceased after a pre-determined time whether or not tone duration has been
reached.
SIM PIN References
NO 3GPP TS 27.007
Syntax
Test Command
AT+VTS=?
Write Command
AT+VTS=<dtmf>
[,<duration>]
AT+VTS=<dtmf-string>
Defined values
<dtmf>
A single ASCII character in the set 0-9, *, #, A, B, C, D.
<duration>
Tone duration in 1/10 seconds, from 0 to 255. This is interpreted as a DTMF tone of different
duration from that mandated by the
AT+VTD command will be used for the tone
<dtmf-string>
A sequence of ASCII character in the set 0-9, *, #, A, B, C, D, and maximal length of the string is
29. The string must be enclosed in double quotes (""), and separated by commas between the ASCII
characters (e.g. "1,3,5,7,9,*"). Each of the tones with a duration which is set by the
command.
SIM7500_SIM7600 Series_AT Command Manual_V1.07
Responses
+VTS: (list of supported<dtmf>s)
OK
Responses
OK
ERROR
AT+VTD command, otherwise, the duration which be set the
(<duration>
Smart Machine Smart Decision
is omitted).
127
AT+VTD
2017-12-25