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16–15
The DCE returns the result code OK if the DCE accepts this command, or it re-
turns the result code ERROR if the <level> parameter is out of range.
• AT+VGT?
The DCE returns the current transmission gain, followed by the OK result code.
• AT+VGT=?
The DCE returns permitted values for the transmission gain. The response is:
56-200
OK
• AT+VIT=<timer>
This command sets the inactive time-out value for the DTE/DCE Inactivity Timer.
The default value is 7 seconds. Acceptable values are 0 to 255 with a unit of 0.1 sec-
onds.The DTE can disable the Inactivity Timer by setting the value to zero.
The DCE returns the OK result code if DCE accepts this command, or it returns
the ERROR result code if <timer> is out of range.
• AT+VIT?
The DCE returns the current Inactivity Timer time-out value, followed by the OK
result code.
• AT+VIT=?
The DCE returns the permitted Inactivity Timer time-out values. The units are in
0.1 seconds. The response is :
0-255
OK
• AT+VLS=<device>
This command causes the DCE to select a voice I/O device. The permitted
<device> is as follows:
<device> Description
0 The DCE is on-hook. The Local phone is connected to the Telco
Line. (default)
1 The DCE is on-hook and is connected to the Local Phone. The Lo-
cal Phone is provided with power to detect the hook condition.
2 The DCE is off-hook and is connected to the Telco Line. The Local
Phone is provided with power to detect the hook condition.
8 The DCE is on-hook and is connected to an External Microphone.
The Local Phone is connected to the Telco Line.
16 The DCE is on-hook and is connected to the Internal Speaker. The
Local Phone is connected to the Telco Line.