Comtrol AT Commands for SmartACFL - Manual (Page 158)

Command Reference Manual
6-14 Conexant 100722A
6.2.2.11 +VSD - Silence Detection (Quiet and Silence)
This command causes the modem to set the silence detection sensitivity and the required period of silence before the modem
reports silence detected at the end of a voice receive either with the “Presumed End of Message” (QUIT) or “Presumed
Hangup (SILENCE) event reports.
Syntax
+VSD=<sds>,<sdi>
Defined Values
<sds> Decimal number corresponding to the selected parameter.
0 Use +VSM silence compression setting and algorithm for long-term silence
detection (if +VSM is in use) or proprietary silence compression setting and
algorithm for long-term silence detection (if +VSM is not in use).
127 Sets less aggressive long-term silence detection independent of presence or use
of silence compression.
128 Sets nominal long-term silence detection independent of presence or use of
silence compression.
129 Sets more aggressive long-term silence detection independent of presence or use
of silence compression.
<sdi> Decimal number specifying the required period of silence, in units of 0.1 second, before the
modem can report silence detected at the end of a voice receive either with the “Presumed End of
Message” (QUIT) or “Presumed Hangup (SILENCE) event reports. A value of 0 disables the
modem silence detection. The range is 0.1 to 25.5 seconds for <sdi> = 1 to 255.
Reporting Current or Selected Values
Command: +VSD?
Response:
<sds>,<sdi>
Example: 0,50 For the default setting.
Reporting Supported Range of Parameter Values
Command: +VSD=?
Response:
(<sds> range),(<sdi> range)
Example: (0,127-129),(0-255)
Result Codes
OK <hook> = 0 or 1.
ERROR Otherwise, or if not in Voice Mode.