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Chapter 7 – Voice Commands
Multi-Tech Systems, Inc. SocketModem MT5600SMI Developer’s Guide 104
Basic Voice Commands
Command: +VIP Voice Initialize All Parameters
Description: his command causes the modem to initialize all voice parameters to their
default values.
Syntax: +VIP
Result Code: OK
ERROR If not in Voice Mode.
Command: +VRX Start Modem Receive (Record):
Description: This command causes the modem to start the voice reception process.
Syntax: +VRX
Result Codes: OK
ERROR If not in Voice Mode.
Command: +VTS Send Voice Tone(s)
Description: This command causes the modem to send DTMF digit or hookflash tones with
the duration specified by +VTD, to send DTMF digit or hookflash tones with
duration specified by this command, or to send single or dual tone frequencies
with duration specified with this command.
Syntax: +VTS=<string>
Defined Values: <string> The tone generation consists of elements in a list where each element is
separated by a comma. Each element can be:
1. A single character which the modem interprets as a DTMF digit (0 - 9, #, *,
or A-D) or hookflash (!), with a duration given by the +VTD command.
2. A 3-element string enclosed in square brackets, "[freq1,freq2,dur]", which
the modem interprets as a general dual tone and duration selection, or
3. A 2-element string enclosed in curly braces, "{X,dur}", which the modem
interprets as a DTMF digit (0 - 9, #, *, or A-D), or hookflash (!) with a duration
(dur) different than that given by the +VTD command.
Missing subparameters assume the default value. Unspecified values always
default to zero for frequencies, DTMF * for DTMF tones, and +VTD for
duration. The omission of commas (and associated subparameters) is valid.
The quantity in the square brackets consists of a 3-element list
(freq1,freq2,dur), which can be used to send single or dual tones. The first
element is the first frequency (freq1) with range 0 or 200-3000 Hz. The
second element is the second frequency (freq2), with range 0 or 200-3000 Hz.
The third element is the duration (dur) in 0.01 second intervals with range 0-
255 (ASCII units of 10 ms). A list may contain null elements. For example
[3000] means that the DCE generates a single tone at 3000 Hz for the default
duration, [3000,3300] means that the DCE generates a dual tone at 3000 and
3300 Hz for the default duration, and [,3300] means that the DCE generates a
single tone at 3300 Hz for the default duration.
The quantity in the curly braces consists of a 2-element list (X,dur), which can
be used to send DTMF tones or hookflash. The first element is the DTMF tone
or hookflash (!) character (X), and the second element is the duration (dur) in
0.01 seconds. The characters are of the same set given above. A list may
contain null elements. For example, {2} means DTMF tone "2" for the default
duration, and {} means silence for the default duration.
The modem will stop the tone generation at the point in the string where the
modem detects a parsing error, encounters an invalid frequency range,
encounters a <CR>, or encounters a semi-colon.