User guide

Developers guidelines | AT commands
92 June 2010
AT+VTS DTMF and tone generation
Unsolicited result codes
+CME Mobile equipment error result
+CR Service reporting control
<negtype> Description
0 Negotiation is done using logical link zero
1 Negotiation is done with USER INFORMATION
messages on a temporary signalling connection
Description: Allows the transmission of DTMF tones. These tones may be used, for
example, when announcing the start of a recording period. The command
is write-only. The command is used only during voice calls.
Note: The ATD command is used only for dialling. It is not possible to
generate arbitrary DTMF tones using the ATD command.
Set command: AT+VTS=<DTMF>
Test command: AT+VTS=? Shows if the command is supported.
Parameter:
<DTMF>: An ASCII character string with entries in the set “0-9, #, *, A-D”, separated
by commas. Each entry is interpreted as a single DTMF tone.
Example: The string “8,9” sends two DTMF tones, “8” followed by “9”.
Description: Produced to indicate completion of a command. Produced when the
command is not recognised, the command line maximum length is
exceeded, the parameter value is invalid or there are other problems with
processing the command line.
Unsolicited result
code: +CME: <err>
Parameter:
<err>: Numeric or verbose format. Decided by AT+CMEE.
Description: Transmitted during connect negotiation at the point where the phone has
determined what speed and quality-of-service will be used, before any
error control or data compression reports are transmitted and before any
final result code is transmitted.
Unsolicited result
code: +CR: <serv>
Parameter:
<serv>: