Vtx - start modem transmit (playback), Syntax, Result codes – Comtrol AT Commands User Manual
Page 187: Vgr - voice gain receive (record gain), Reporting current or selected values, Reporting supported range of parameter values

AT Commands for CX81801/CX06833/CX81300/CX06827 Modems Reference Manual
102184B
Conexant
5-11
+VIT - Voice Inactivity Timer (DTE/Modem)
This command sets the modem’s initial value for the DTE/modem inactivity timer.
Syntax
+VIT=<timer>
Defined Values
<timer>
Decimal number corresponding to the time in units of 1.0
second. A value of 0 disables the timer.
Reporting Current or Selected Values
Command: +VIT?
Response: <timer>
Example:
0
For the default setting.
Reporting Supported Range of Parameter Values
Command: +VIT=?
Response: <timer>
range
Example: 0-255
Result Codes
OK
<timer> = 0-255.
ERROR
Otherwise, or if not in Voice Mode.
+VLS - Analog Source/Destination Selection
This command causes the modem to select one or more source/destinations of the analog
data.
Syntax
+VLS=<label>
Defined Values
<label>
Decimal number corresponding to the selected analog
source/destination hardware configuration (see Table 5-5).
Command: +VLS?
Response: <label>
Example:
0
For the default setting.