this SIM5218 AT command manual - Cooking Hacks

SIM5218 Serial AT Command Set
AT+CRC=1
OK
AT+CRC
+CRC: 1
OK
4.18 AT+VTS DTMF and tone generation
Description
The 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
YES 3GPP TS 27.007
Syntax
Test Command
AT+VTS=
Write Command
AT+VTS=
[,]
AT+VTS=
Responses
+VTS: (list of supporteds)
OK
Responses
OK
ERROR
Defined values
A single ASCII character in the set 0-9, *, #, A, B, C, D.
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, otherwise, the duration which be set the
AT+VTD command will be used for the tone ( is omitted).
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 AT+VTD
command.
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5/15/2012