Vsd - Silence Detection (Quiet And Silence) - Conexant H08-15355F Reference Manual

5.2.2.12 +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.
<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: +VSD: <sds>,<sdi>
Example: +VSD: 128, 50
Reporting Supported Range of Parameter Values
Command: +VSD=?
Response: +VSD: (<sds> range),(<sdi> range)
Example: +VSD: (0,127,128,129),(0-255)
Result Codes
OK <hook> = 0 or 1.
ERROR Otherwise, or if not in Voice Mode.
1118
Command Reference Manual
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.
For the default setting.
Conexant
5-13