Silicon Laboratories SI2493/57/34/15/04 Command Action Transmit Gain Selection, DAA is inactive

AN93

Table 39. Basic AT Command Set (Continued)
Command		Action
	Transmit Gain Selection.
	The <gain> parameter has a range of 112-134 with 128 being the
+VGT	nominal value. This represents a range of -48 to 18 dB. The default
	is 128 (0 dB). This command is used to control the transmit gain at
	the DTE to either the Si3000 Codec or the DAA. The purpose is to
	adjust the DTE transmit gain for the TAM voice stream during idle
	state.
+VIP	Load Voice Factory Defaults.
	DTE/DCE Inactivity Timer.
+VIT	The <timer> parameter has a range of 0–255 with units of sec-
	onds.
	The default is 0 (disable).
+VLS = n	Analog Source / Destination Select.
	n	Description
	0	ISOmodem on-hook. AOUT disabled. Tone detec-
		tors disabled. Si3000 sample pass-through to
		DAA is inactive.
	1	ISOmodem off-hook. AOUT disabled. Tone detectors
	disabled.
	4	ISOmodem on-hook. AOUT connected to ISOmo-
		dem tone generators. Tone detectors disabled.
	5	ISOmodem off-hook. AOUT connected to PSTN.
	Tone detectors enabled.
	15	ISOmodem goes off-hook, begins V.253 tone event
		reporting and Si3000 to DAA sample pass-through
		becomes active. Dial tone can be heard on handset.
	20	ISOmodem on-hook. AOUT disabled. Tone detectors
	enabled.
	21	ISOmodem on-hook. AOUT connected to ISOmo-
		dem tone generators. Tone detectors enabled.
+VNH = <hook	Automatic Hangup Control.
>	<hook>	Hook control description
	0	The ISOmodem retains automatic hangups as
		is normal in the other modes (such as hanging
		up the phone when the ISOmodem does not
		detect a data carrier with a given time interval).
	1	The ISOmodem shall disable automatic hangups
		in the other non-voice modes.
	2	The ISOmodem shall disable all hang-ups in other
		non-voice modes. The ISOmodem shall only per-
		form a “logical” hangup (return the OK result
		code).

74 Rev. 1.3