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Chapter 10 - Voice Mode Operation
10-18
The DCE returns the VCON result code (returns OK if S48.5=1) if the DCE
accepts this command, or it returns the ERROR result code if the <device> value
is not permitted.
AT+VLS?
The DCE will return the current I/O device followed by the OK result code.
AT+VLS=?
The DCE will return permitted I/O devices. The response is:
0,1,2,8,16
OK
AT+VSD=<sds>,<sdi>
This command causes the DCE to set the silence detection sensitivity and the
required period of silence before the DCE can report silence detected at the end
of a voice reception either with the "Presumed End of Message" (QUIET) or
"Presumed Hang-up" (SILENCE) event reports.
<sds>: DCE silence detection threshold level a larger value of this
subparameter implies that the DTE wants the DCE to treat noisier condition
as silence. The actual value of this subparameter has no physical meaning.
The range of the sensitivity <sds> is from 0 to 31. A value of zero disables
the silence detection. The default value is 15.
<sdi>: The required period of silence before the DCE can report silence
detected either with the "Presumed End of Message" (QUIET) or "Presumed
Hang-up" (SILENCE) event report. A value of zero disables the DCE silence
detection. The range of the interval <sdi> is from 0 to 255 in units of 0.1
seconds. The default value is 70 (7 seconds).
The DCE returns the OK result code if DCE accepts this command, or it returns
the ERROR result code if <sds> or <sdi> is out of range.
AT+VSD?
This command causes the DCE to report current <sds> and <sdi> settings. The
form of the response is:
<sds>,<sdi>
OK
AT+VSD=?
This command causes the DCE to report the permitted range of <sds> and <sdi>.
The response is:
(0-31),(0-255)