Specifications

AT Command Set for L55 Platform 2003-11-21
Copyright  Siemens AG 2003 All Rights Reserved Page 59 of 131
2.3.8 TIA IS-101 commands (“Voice control interim standard for asynchronous DCE”)
This section provides the descriptions of other AT commands.
2.3.8.1 AT+VTD
AT+VTD Set duration of a DTMF tone
Test command
AT+VTD=?
Response
+VTD: (list of supported <duration>s)
OK/ERROR/+CME ERROR
Parameter
<duration>
1-255 Duration of tone (in tenths of seconds)
Read command
AT+VTD?
Response
+VTD: <duration>
OK/ERROR/+CME ERROR
Write command
AT+VTD=<duration>
Parameter
<duration
>
See Test command
Response
OK/ERROR
2.3.8.2 AT+VTS
AT+VTS Send a DTMF tone
Test command
AT+VTS=?
Response
(list of supported <dtmf>s), (list of supported <duration>s)
OK/ERROR/+CME ERROR
Parameter
<dtmf>
0-9,
#,*,
A-D
exactly one character of the list
<duration> 1 .. 255 Duration of tone (in tenths of seconds)
Write command
AT+VTS=<dtmf>[,<duration>]
Or
AT+VTS=<dtmf-string>
Parameter
<dtmf>
character from the list, see Test command
<dtmf-string> max. 29 characters in quotation marks (”...”)
(no duration cannot be specified)
Response
OK/ERROR/+CME ERROR