Filter
Top Products
OnCell G2150I AT Command Set Call Control Commands
4-5
DTMF Signals: +VTD, +VTS
+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 70 ms ± 5 ms,
according to 3GPP 23.014).
Command syntax: AT+VTD=<n>
Command Possible responses
AT+VTD =6
Note: To define 600 ms tone duration
OK
Note: Command valid
AT+VTD =0
Note: To set the default value (70±5 ms)
OK
AT+VTD ?
Note: interrogate current tone duration
+VTD: <n>
OK
AT+VTD =? +VTD: (0-255)
OK
Defined values: <n>: tone duration
This refers to an integer <n> that defines the length of tones emitted as a result of the +VTS
command. This does not affect the D command. A value different than zero causes a tone of
duration <n>*100 milliseconds. A value of zero (default value) causes a tone duration of 70 ±
5 ms. Note: The value is used modulo 256.
+VTS description: The product enables the user application to send DTMF tones over the GSM
network. This command enables tones to be transmitted, only when there is an active
call.
Command syntax: AT+VTS=<Tone>
Command Possible responses
AT+VTS=“A” OK
Note: Command valid
AT+VTS=“11” +CME ERROR: 3
Note: If the <Tone> is wrong
AT+VTS=“4” +CME ERROR: 3
Note: If there is no communication
AT+VTS=“1”;+VTS=“3”;+VTS=“#”
OK
Note: send tone sequence 13#
Defined values: <Tone>: DTMF tone to transmit
<Tone> is in {0-9,*,#,A,B,C,D}
Redial Last Telephone Number: ATDL
Description: This command is used by the application to redial the last number used in the ATD
command. The last number dialed is displayed followed by “;” for voice calls only
Command syntax: ATDL
Command Possible responses
ATDL
Note: Redial last number
0146290800;
OK
Note: Last call was a voice call. Command valid
Defined values: No parameter