Owner's manual
 FLYFOT-MG260-MODULE  
Page: 31 / 246 
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+VTD Syntax:   
Command syntax: AT+VTD=<n> 
Command  Possible responses 
AT+ V TD = 6 
Note: To define600 ms tone duration 
OK 
Note: Command valid 
AT+ V TD = 0 
Note: To set the default value 
OK 
AT+ V TD ?  
Note: interrogate current tone duration 
+VTD: <n> 
OK 
AT+ V TD = ? 
+VTD: (0-255) 
OK 
Defined values :   
<n> : tone duration 
<n>*100 is the duration in ms. 
If n < 4, tone duration is 300 ms; if n > 255, the value is used modulo 256. 
Default value is 300 ms, that is <n> = 3. 
+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. 
+VTS Syntax:   
Command syntax: AT+VTS=<Tone> 
Command  Possible responses 
AT+VTS=A 
OK 
Note: Command valid 
AT+VTS=11 
+CME ERROR: 4 
Note: If the <Tone> is wrong 
AT+VTS=4 
+CME ERROR: 3 
Note: If there is no communication 
Defined values:   
<Tone>: 
The value is in {0-9, *, #, A, B, C, D} 
Example: 
To send tone sequence 13#, the application sends: 
AT+VTS=1; +VTS=3; +VTS=# 
OK 
5.7  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 










