ZyXEL Communications 56K Plus Series manual 45

Omni 56K Plus Series User’s Guide

Table 4-12 Voice AT Commands

COMMAND	FUNCTION	OPTION	DEFAULT	DESCRIPTION
+VGR	Set the gain	0	0	0: Automatic gain control(AGC)
	for the
	received
	voice sample.
+VGT	Set the gain	0-255	128	0: Silence
	for the			1-255: The larger the value, the louder the
	transmitted
				voice will be.
	voice sample.
+VLS	Select a voice	0,1, 2	0	0: The DCE is on hook. Local phone
	I/O device.			connected to Telco line.
				1: The DCE is on-hook and is connected to the
				local phone. The local phone is also provided
				with power. The modem can record/play
				through the local phone set.
				2: The DCE is off-hook and is connected to the
				Telephone line. The local phone is provided
				with power. The modem can record/play
				through the local telephone line.
+VRA	Ring back	0 – 255	70	0: turn off the timer
	goes away			1-255: Defines the period without ringback
	timer
				(after at lease one ringback has been
				detected) in 100 -ms units.
+VRN	Ring back	0 – 255	10	0: turn off the timer
	never come			1-255: Defines the period without ringback
	timer
				after dialing in 1 sec unit.
+VTX	Voice transmit	NA	NA	Switches to voice transmit mode.
	mode
+VSD	Silence	Threshold,	15,70	Threshold:
	detection	Period		0: Disable silence detection.
		(0-255), (0-255)		1-255: The smaller the value, the more
				sensitive to the silence detection it will be.
				Period:
				1-255: The required period of silence detection
				before DCE reporting the silence event.
				0: Disable silence detection.
				Unit: 0.1 second
+VSM	Selection of	4;ZyXEL ADPCM;	4,9600	IMA 4 bit ADPCM.
	compression	4 Bit;(9600)		Sample rate: 9600
	method
+VTS=	Dual Tone	x: 0-3000 Hz	NA	x: first tone frequency
[x,y,z]	Generation	y: 0-3000 Hz		y: second tone frequency
		z: 0- 1000(10ms)		z: duration in 10ms unit
+VTS=	DTMF Tone	x:0-9,*,#, A-D	NA	x: DTMF digits (0-9,*,#, A,B,C,D)
{x,y}	Generation	y:0-1000 (10ms)		y: duration in 10ms unit

Command Sets 4-17