Westermo GD-01 - Manual (Page 22)

22 6196-2220
+VTD, +VTS – DTMF signals
+VTD Description:
The product enables the user application to send DTMF tones over the GSM network.
This command is used to define tone duration (the default value is 300 ms).
+VTD Syntax:
AT+VTD= where *100 gives the duration in ms.
If n < 4, tone duration is 300 ms.
Command example Possible responses Note
AT+VTD=6 OK To define 600 ms tone
duration, command valid
AT+VTD=0 OK To set the default value
+VTS Description:
The product enables the user application to send DTMF tones over the GSM network.
This command enables tones to be transmitted. DTMF tones can only be transmitted
when there is an active call.
+VTS Syntax:
AT+VTS= where is in {0-9,*,#,A,B,C,D}.
Command example Possible responses Note
AT+VTS=A OK Command valid
AT+VTS=11 +CME ERROR: 4 If the is wrong
AT+VTS=4 +CME ERROR: 3 If there is no communica-
tion
Informative example:
To send tone sequence 13#, the application sends:
AT+VTS=1;+VTS=3;+VTS=#
B A C K