AT Command Reference Manual
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1048
#VTM - Enable Timing Mark Placement
This command controls the placement of <DLE><T> timing marks by the DCE in the data stream during ADPCM recording.
Parameters:
n=0 (disabled) or 10 (1 second interval)
Default:
n=0 (disabled)
Result Codes:
OK
If n=0 or 10
ERROR
Otherwise
Command Options:
#VTM?
Returns the current setting of the #VTM command as an ASCII decimal value in result code
format.
#VTM=?
Returns "0, 10"
#VTS - Generate Tone Signals (Online Voice Command)
This action command can be issued to play one of more DTMF or other tones (such as a “beep") if and only if the modem is
in the Online Voice Command Mode and the sampling rate (see the #VSR command) is set to 7.2 kHz. The modem parses
and plays the tones defined in the parameter in the order listed, and no key abort is accepted. The parameter can have
three types of elements separated by commas, and following "#VTS=":
Dual or Single Tones with Variable Duration: These are represented by the substring [x,y,z] (enclosed in square
brackets, "[ ]", as shown) in the parameter field. Each such substring consists of three sub-
elements corresponding to the two frequencies (i.e., x and y), and the duration (i.e., z).
[x,y,z]
x represents the first frequency (0 or 200-3000 Hz)
y represents second frequency (0 or 200-3000 Hz)
z represents the duration (which is ASCII decimal in units of 100 ms)
DTMF Digits with Variable Duration. This is represented by a substring {x,z} (enclosed in curly braces, "{}", as
shown) in the parameter field. Each such substring consists of two sub-elements
corresponding to a DTMF digit (i.e., x) and the duration (i.e., z).
{x,z}
x represents the DTMF digit (0-9,A-D,*,#)
z represents the duration (which is ASCII decimal in units of 100 ms)
DTMF Digits, with duration defined by #VBT. This is represented by a value x (non-bracketed) corresponding to a
DTMF digit (i.e., x) in the parameter field.
x
x represents the DTMF digit (0-9,A-D,*,#), with the duration defined by #VBT
Command options:
#VTS=[x,y,z], {x,z}, and/or x, as described above.
Parameters:
The tone generation consists of elements in a list with each element separated by commas.
Result Codes:
OK
Command to play tones on currently selected device is accepted.
ERROR
Command was not issued during Online Voice Command Mode or string is grammatically
incorrect.
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