Dtmf Signals +Vtd, +Vts - Wavecom WMO1-G900 User Manual

Wavecom GSM Modem
3.5. DTMF signals
The GSM module offers the user application to send DTMF tones. One
command shall be used for defining the duration of the tones (default value is
70 ms), the other for sending the Tones.
For defining the duration, the application uses :
Application to GSM
GSM to application
Application to GSM
GSM to application
Application to GSM
GSM to application
For sending DTMF tones, the application uses :
Application to GSM
GSM to application
Application to GSM
GSM to application
Application to GSM
GSM to application
Exemple : to send the Tone sequence 13#, the application shall send :
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+VTD, +VTS
AT+VTD=<n>
AT+VTD=1
OK
AT+VTD=100000
+CME ERROR: 3
AT+VTD=0
OK
AT+VTS=<Tone>
AT+VTS=A
OK
AT+VTS=11
+CME ERROR: 4
AT+VTS=4
+CME ERROR: 3
AT+VTS=1
OK
AT+VTS=3
OK
AT+VTS=#
OK
where <n>*100 gives the duration in ms.
for defining 100 ms tone duration
command valid
if the duration is too long (the limit is to
define for each application)
for setting the manufacturer default value
where <Tone> is in {0-9,*,#,A,B,C,D}
command valid
if the <Tone> is wrong
if there is no communication
and then wait for
and then wait for
and then wait for
14