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Chapter 6 – Voice Commands
SocketModem Global MT5634SMI Developer’s Guide 64
AT+VLS=2 The DCE answers the phone.
OK The DCE indicates that it is in Voice Command mode.
AT+VTX The DTE selects Voice Transmit mode.
CONNECT The DCE agrees.
<Data> The DTE plays the welcome message.
<DLE> <ETX> The DTE indicates the end of the data stream.
OK The DCE indicates that it is in Voice Command mode.
AT+VTS= {933, 0, 12} The DTE annotates the greeting message with a 1.2 sec. beep.
OK The DCE is ready for another Voice command.
AT+VSM=132, 7200, 0, 0 The DTE selects a low bit compression scheme to save disk space.
OK The DCE agrees.
AT+VRX The DTE selects the Voice Receive mode.
CONNECT The DCE agrees.
<Data> The DCE delivers <DLE> shielded and silence-compressed voice data across the
DTE/DCE interface.
<DLE> <NUL> The DTE strokes the Inactivity Timer.
<DLE> </> The DCE reports the start of a possible DTMF tone.
<DLE> <5> <DLE> <5> The DCE reports a DTMF 5 detection for 140 milliseconds (within a 70 millisecond
resolution).
<DLE> <-> The DCE reports the end of the DTMF 5 detection. For this example, DTMF 5 means
"finish with the voice message, and switch to fax mode".
<DLE> <!> The DTE wishes to end the record by sending an abort command.
<DLE> <ETX> The DCE indicates the end of the Voice data stream, and returns to Voice Command
mode.
AT+VNH=1 The DTE selects to disable automatic hang-ups while in Service Class 2 +VIT=0 (+FSK
command result codes in Telco on-hook). The DTE switches the +FCLASS=2 DCE to
Service Class 2 fax mode.
OK The DCE agrees.
ATA The DCE starts the fax receive process.