Specifications

MC55 AT Command Set
17.6 AT+VTD
s
MC55_ATC_V03.03 Page 390 of 459 9/9/05
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17.6 AT+VTD Tone duration
This command refers to an integer <duration> that defines the length of tones transmitted with the AT+VTS
command.
Syntax
Parameter Description
Duration of the DTMF signal in 1/10 seconds with tolerance.
The minimum duration of DTMF signals is 300ms. DTMF tones below 300ms cannot be generated.
1
(&F)(P)
...255
Test Command
AT+VTD=?
Response(s)
+VTD: (list of supported<duration>s)
OK
Read Command
AT+VTD?
Response(s)
<duration>
OK
Write Command
AT+VTD=<duration>
Response(s)
OK
ERROR
+CME ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge  Last
GSM 07.07 ! % % % % % ! ! !
<duration>
(num)