Specifications

AT Command Set
TC35-ATC-01-V02.10 Page 87/145 02.10 / 23.05.2001
4.44 AT+VTD=<n> Tone duration
Test command
AT+VTD=?
This command refers to an integer <duration> that defines the length of tones
emitted as a result of the +VTS command.
Response
(list of supported <duration>s) OK
Parameter
See write command
Read command
AT+VTD?
Response
<duration> OK
Parameter
See write command
Write command
AT+VTD =
<duration>
Response
OK
Parameter
<duration>
1 - 255 duration of the tone in 1/10 second
Reference
GSM 07.07
Note
4.45 AT+VTS DTMF and tone generation (<Tone> in {0-9, *, #, A, B, C, D})
Test command
AT+VTS=?
Response
+VTS: (list of supported <dtmf>s)[, (list of supported <duration>s)] OK
Parameter
See write command
Write command
1)
AT+VTS=<dtmf
- string>
2)
AT+VTS=<dt-
mf>,<duration>
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.
1) This is interpreted as a sequence of DTMF tones whose duration is set by the
+VTD command.
2) This is interpreted as a DTMF tone whose duration is determined by <dura-
tion>.
OK
If error is related to ME functionality:
+CME ERROR: <err>
Parameter
<dtmfstring> String of ASCII characters in the set 0-9,#,*,A, B, C, D. Maximal
length of the string is 29. The string has to be entered between
double-quote characters (””).
<dtmf> ASCII character in the set 0-9,#,*, A, B, C, D.
<duration> 1-255 duration of a tone in 1/10 second
Reference
GSM 07.07
Note
This command only works during active voice call